Darken the dark theme, and hover a tree row like a menu

The client's own look-and-feel defaults now live beside LookAndFeelManager as
FlatLaf properties files, which FlatLaf loads on top of each theme's own,
instead of a handful of UIManager.put calls.

The dark theme is built on three surfaces keyed to the toolbar's #282828: the
window chrome, the tab strips and menu bar one step below it at #232323, and
the content the client shows — channel tree, chat log, text fields, lists — at
#1e1e1e. Selections are #364b6f, and channel names in the tree are white; the
chat lines about server events keep the blue they had, which channel names no
longer carry. Everything FlatLaf derives (borders, scroll bars, hover states)
follows from those.

A read-only editor pane is a chat log or an information view here, not a
disabled input, so it keeps the content background rather than FlatLaf's
inactive one; and since neither a text view nor a tree fills its viewport, the
space below the last line takes their background instead of the window's.

The row under the pointer is now washed in the same colour a hovered menu is,
rather than outlined. FlatLaf states that colour as a shift of the surface
beneath it, so it is resolved against the window background exactly as the
menu bar resolves it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

.gitignore

@@ -6,6 +6,7 @@ out/
 
 # The bundled proprietary TeamSpeak 3 client (reference binary, not our source)
 /TeamSpeak3-Client-linux_amd64/
+/re-android/
 
 # Packages
 *.jar

ts3-client/README.md

@@ -80,6 +80,35 @@ frontend supplies its own UI and audio backend while reusing `core` unchanged.
 - **Status bar** shows the server name, user count and live ping.
 - Change your nickname, mute/deafen from the toolbar.
 
+### Hotkeys
+- **Global hotkeys**, as in TeamSpeak 3: single keys or combinations (any key can act
+  as the modifier) and mouse buttons including *Mouse 4* / *Mouse 5*, working
+  system-wide rather than only while the window has focus. Configure them in
+  **Options → Hotkeys**.
+- Per binding you choose whether it **triggers on key down or on key up**, and whether
+  it applies **on the active server** only or to every connected one (checkbox off).
+  Push-to-talk style actions ignore the trigger setting and simply last while held.
+- The action list is TeamSpeak's own, reverse-engineered from its hotkey dialog:
+  three categories (*Server*, *Self*, *Misc*) and a **"Show advanced actions"**
+  checkbox that reveals the rest, exactly as the original hides all but the everyday
+  actions. Actions this client does not implement are listed but greyed out.
+- Push-to-talk is one of those hotkeys; the button in **Options → Voice Activation**
+  edits that binding.
+- On Linux, capture uses **XInput2 raw events**, as TeamSpeak's own client does: no
+  privileges needed and the keystroke is not swallowed. X11's RECORD extension is kept
+  as a fallback for servers without XInput2.
+- On **Windows**, capture uses **raw input** (`RIDEV_INPUTSINK`) through a message-only
+  window: it observes rather than intercepts, so unlike a low-level keyboard hook it
+  cannot swallow a keystroke or stall the system input queue, and it reports the side
+  buttons and both edges of every key. Bindings are stored as scan codes, so they follow
+  the physical key rather than the layout.
+- On Wayland the hooks run inside Xwayland, so they see every X11 application, and keys
+  aimed at native Wayland windows only where the compositor forwards them — under KWin
+  that is *System Settings → Window Management → Legacy X11 App Support*, which is why
+  TeamSpeak's hotkeys work there. Where it forwards nothing, the client reads
+  `/dev/input/event*` instead, for which your user has to be in the `input` group.
+  The Hotkeys tab says which backend is in use, or why none is.
+
 ### Notification sounds
 - **Sound packs** in TeamSpeak's own format: a folder of waves plus a `settings.ini`
   mapping actions (`CONNECTION_CONNECTED`, `CLIENT_MOVED_TO_CURRENT_CHANNEL_STAYS`, …)
@@ -151,6 +180,12 @@ core/   com.ts3client
 ├── gfx
 │   ├── IconPack             an icon pack zip/folder + its settings.ini mapping
 │   └── IconPacks            discovery of installed packs
+├── hotkey
+│   ├── HotkeyAction         catalogue of TeamSpeak's hotkey actions (RE'd from its binary)
+│   ├── Hotkey/HotkeyCombo   one binding: keys, trigger edge, server scope, argument
+│   ├── Hotkeys              persisted bindings (~/.ts3jclient/hotkeys.properties)
+│   ├── GlobalInputHook      platform hook interface: system-wide key/button events
+│   └── HotkeyEngine         held-key tracking, combination matching, recording
 ├── sound
 │   ├── SoundEvent           catalogue of actions (TeamSpeak's own event ids)
 │   ├── SoundPack            a pack folder + its settings.ini mapping
@@ -164,14 +199,22 @@ core/   com.ts3client
     ├── ChannelNode/ClientEntry  view models
     └── ConnectionListener   frontend callbacks
 
-desktop/  com.ts3client.audio.desktop
+desktop/  com.ts3client.audio.desktop + com.ts3client.hotkey.desktop
 ├── Opus                     Panama (FFM) binding to native libopus
 ├── OpusEncoder/OpusDecoder  thin codec wrappers
 ├── AudioDevices             device enumeration + line opening (48 kHz/16-bit)
 ├── JavaSoundVoiceInput      capture + VAD/PTT gating + Opus encode
 ├── JavaSoundVoiceOutput     per-client Opus decode + playback + mixing
 ├── WavSoundPlayer           sound-pack playback: decode, resample and mix on one line
-└── JavaSoundAudioBackend    wires the above into the core AudioBackend
+├── JavaSoundAudioBackend    wires the above into the core AudioBackend
+└── hotkey.desktop
+    ├── XInput2InputHook     global key/button capture via XInput2 raw events
+    ├── XRecordInputHook     the same via X11's RECORD extension, as a fallback
+    ├── EvdevInputHook       /dev/input fallback for Wayland sessions
+    ├── WindowsInputHook     the same on Windows: raw input into a message-only window
+    ├── RawInput             RAWINPUT layout and decoding, split out to be testable
+    ├── X11KeyNamer/WindowsKeyNamer  layout-aware key labels per platform
+    └── DesktopInputHooks    picks the backend that suits the session
 
 swing/  com.ts3client
 ├── Main                     entry point (look & feel, settings, backend injection)
@@ -182,6 +225,10 @@ swing/  com.ts3client
     ├── InfoPanel            channel description / client group + details view
     ├── ChatPanel            chat log + input
     ├── SettingsDialog       audio + VAD options with live meter
+    ├── HotkeysPanel         hotkey list (Options → Hotkeys)
+    ├── HotkeyDialog         add/edit one hotkey: action, combination, trigger, scope
+    ├── HotkeyService        bindings + engine + input hook, for the dialogs
+    ├── HotkeyActions        carries a fired hotkey out on the client
     ├── NotificationsPanel   sound pack + per-action sound/important configuration
     ├── IconPackPanel        icon pack chooser + icon viewer (Options → Design)
     ├── ConnectDialog        connect form
@@ -200,6 +247,15 @@ swing/  com.ts3client
   dependency-free and reusable in the core library.
 - Whisper is received/played but not yet **sendable** from the UI.
 - Playback decodes streams as mono; stereo music-bot audio is down-mixed.
-- Push-to-talk is captured via Swing key events, so it only works while the app
-  window has focus (no global hotkey).
+- Hotkey actions TeamSpeak offers but this client does not perform yet (listed but
+  greyed out in the dialog): capture/playback/hotkey profiles and sound packs,
+  whisper and push-to-whisper, recording, plugins, server groups, talk power, 3D
+  sound, hardware ("local") microphone mute and the channel-traversal variants
+  beyond "Switch to Channel".
+- Global hotkeys cover Linux and Windows; **macOS has no backend**, so hotkeys there are
+  inert (a `CGEventTap`, which needs Accessibility permission, is the way in). The
+  Windows backend is written but has not been run on Windows — only its decoding is
+  covered by tests.
+- When no backend can start, push-to-talk does not work at all, not even with the window
+  focused; a focus-scoped fallback hook would restore the pre-hotkey behaviour.
 - No file transfer, avatars, or server/channel administration UI yet.

ts3-client/core/src/main/java/com/ts3client/audio/AudioFrameListener.java

@@ -0,0 +1,17 @@
+package com.ts3client.audio;
+
+/** Receives frames of PCM audio as they pass through the capture or playback chain. */
+@FunctionalInterface
+public interface AudioFrameListener {
+
+    /**
+     * Called with one frame of interleaved samples in [-1, 1].
+     *
+     * <p>The array is reused between calls, so copy anything you need to keep. Called from
+     * the audio thread: do not block.
+     *
+     * @param interleaved samples, {@code channels} per sample position
+     * @param channels    number of interleaved channels
+     */
+    void onFrame(float[] interleaved, int channels);
+}

ts3-client/core/src/main/java/com/ts3client/audio/InputLevel.java

@@ -0,0 +1,58 @@
+package com.ts3client.audio;
+
+/**
+ * Capture level on the scale the TeamSpeak 3 client puts on its voice-activation slider.
+ *
+ * <p>TS3 stores {@code voiceactivation_level} in decibels but compares powers: its setter
+ * converts the slider value with {@code 10^(dB/10) * 0.0095} and its getter reports a
+ * measured power back with {@code 10*log10(power / 0.0095)}. The same reference constant is
+ * used here so a threshold of &minus;40 means the same thing it does in TeamSpeak.
+ *
+ * <p>The resulting scale runs from {@link #MIN_DB} to {@link #MAX_DB}, with 0&nbsp;dB
+ * corresponding to roughly &minus;20&nbsp;dBFS and the default &minus;40 to about
+ * &minus;60&nbsp;dBFS.
+ */
+public final class InputLevel {
+
+    /**
+     * Mean-square level that reads as 0 dB, taken from the client's own dB conversion.
+     */
+    private static final double REFERENCE_POWER = 0.0095;
+
+    /** Lower end of the slider range. */
+    public static final double MIN_DB = -50.0;
+
+    /** Upper end of the slider range. */
+    public static final double MAX_DB = 50.0;
+
+    /** Reported when the frame is digital silence. */
+    public static final double SILENCE_DB = MIN_DB;
+
+    private InputLevel() {
+    }
+
+    /** Level of {@code length} mono samples in [-1, 1], in dB on the scale above. */
+    public static double toDb(float[] frame, int length) {
+        if (length <= 0) {
+            return SILENCE_DB;
+        }
+        double sumSq = 0;
+        for (int i = 0; i < length; i++) {
+            sumSq += (double) frame[i] * frame[i];
+        }
+        return powerToDb(sumSq / length);
+    }
+
+    /** Converts a mean-square power to the slider's dB scale. */
+    public static double powerToDb(double power) {
+        if (power <= 0) {
+            return SILENCE_DB;
+        }
+        return Math.max(SILENCE_DB, 10.0 * Math.log10(power / REFERENCE_POWER));
+    }
+
+    /** Inverse of {@link #powerToDb}, matching the client's threshold conversion. */
+    public static double dbToPower(double db) {
+        return Math.pow(10.0, db / 10.0) * REFERENCE_POWER;
+    }
+}

ts3-client/core/src/main/java/com/ts3client/audio/SpeechDetector.java

@@ -1,112 +0,0 @@
-package com.ts3client.audio;
-
-/**
- * Lightweight speech-presence detector used by the "Automatic" and "Hybrid" voice
- * activation modes (the TeamSpeak 3 client uses a WebRTC GMM detector for the same
- * purpose). It classifies each 20 ms frame from three features — short-term
- * energy, spectral flatness and dominant frequency — against an adaptive noise
- * floor, following Moattar & Homayounpour's real-time VAD.
- *
- * <p>Pure DSP with no platform dependencies, so any frontend/backend can reuse it.
- * A frame votes for speech when at least two of the three features exceed the
- * baseline; the smoothed vote fraction is exposed as a [0,1] probability.
- */
-public final class SpeechDetector {
-
-    private static final int FFT_SIZE = 1024;
-
-    // Primary thresholds from the reference algorithm (16-bit sample scale).
-    private static final double ENERGY_PRIM = 40.0;
-    private static final double DOMINANT_FREQ_PRIM = 185.0;
-    private static final double FLATNESS_PRIM = 5.0;
-
-    private final int sampleRate;
-    private final double[] re = new double[FFT_SIZE];
-    private final double[] im = new double[FFT_SIZE];
-
-    private double minEnergy;
-    private double minDominantFreq;
-    private double minFlatness;
-    private long silenceFrames;
-    private long frameCount;
-    private double probability;
-
-    public SpeechDetector(int sampleRate) {
-        this.sampleRate = sampleRate;
-    }
-
-    public void reset() {
-        frameCount = 0;
-        silenceFrames = 0;
-        probability = 0;
-    }
-
-    public double getProbability() {
-        return probability;
-    }
-
-    /**
-     * Processes one frame of mono PCM in [-1,1] and returns the smoothed speech
-     * probability in [0,1].
-     */
-    public double process(float[] frame) {
-        double energy = 0;
-        int n = Math.min(frame.length, FFT_SIZE);
-        for (int i = 0; i < n; i++) {
-            double s = frame[i] * 32768.0; // emulate 16-bit scale
-            energy += s * s;
-            re[i] = frame[i];
-            im[i] = 0;
-        }
-        for (int i = n; i < FFT_SIZE; i++) {
-            re[i] = 0;
-            im[i] = 0;
-        }
-
-        Fft.forward(re, im);
-
-        int half = FFT_SIZE / 2;
-        double geoLogSum = 0;
-        double arithSum = 0;
-        double maxMag = 0;
-        int maxBin = 0;
-        for (int k = 1; k < half; k++) {
-            double mag = Math.sqrt(re[k] * re[k] + im[k] * im[k]) + 1e-12;
-            geoLogSum += Math.log(mag);
-            arithSum += mag;
-            if (mag > maxMag) {
-                maxMag = mag;
-                maxBin = k;
-            }
-        }
-        int bins = half - 1;
-        double geoMean = Math.exp(geoLogSum / bins);
-        double arithMean = arithSum / bins;
-        double flatness = -10.0 * Math.log10(geoMean / arithMean); // high = tonal (speech)
-        double dominantFreq = (double) maxBin * sampleRate / FFT_SIZE;
-
-        if (frameCount == 0) {
-            minEnergy = Math.max(energy, 1.0);
-            minDominantFreq = dominantFreq;
-            minFlatness = flatness;
-        }
-
-        double energyThresh = ENERGY_PRIM * Math.log10(Math.max(minEnergy, 1.0));
-        int votes = 0;
-        if (energy - minEnergy >= energyThresh) votes++;
-        if (dominantFreq - minDominantFreq >= DOMINANT_FREQ_PRIM) votes++;
-        if (flatness - minFlatness >= FLATNESS_PRIM) votes++;
-
-        boolean speech = votes >= 2;
-        if (!speech) {
-            // Adapt the noise floor towards the current (silent) energy.
-            silenceFrames++;
-            minEnergy = ((silenceFrames * minEnergy) + energy) / (silenceFrames + 1);
-        }
-
-        double instant = votes / 3.0;
-        probability = 0.6 * probability + 0.4 * instant;
-        frameCount++;
-        return probability;
-    }
-}

ts3-client/core/src/main/java/com/ts3client/audio/SpeechProbabilityDetector.java

@@ -0,0 +1,27 @@
+package com.ts3client.audio;
+
+/**
+ * Estimates how likely it is that a frame of captured audio contains speech.
+ *
+ * <p>Used by the "Automatic" and "Hybrid" voice-activation modes. Implementations are
+ * stateful and expect frames in capture order; {@link #reset()} clears that state.
+ *
+ * <p>Pure DSP with no platform dependencies, so any frontend or backend can reuse it.
+ */
+public interface SpeechProbabilityDetector {
+
+    /**
+     * Consumes one frame of mono PCM in [-1, 1] and returns the current speech
+     * probability in [0, 1].
+     *
+     * @param frame  samples in capture order
+     * @param length number of valid samples in {@code frame}
+     */
+    double process(float[] frame, int length);
+
+    /** Speech probability from the most recent {@link #process} call. */
+    double probability();
+
+    /** Drops all history. Call on a capture discontinuity or a settings change. */
+    void reset();
+}

ts3-client/core/src/main/java/com/ts3client/audio/VoiceInput.java

@@ -18,11 +18,20 @@ public interface VoiceInput extends Microphone {
 
     void setMuted(boolean muted);
 
+    /**
+     * Silences capture the same way {@link #setMuted} does, but locally only: it does
+     * not touch {@link #isMuted}, so the mute status published to the server (and the
+     * mute/unmute sound) is unaffected. TS3's "Local Mic Mute".
+     */
+    void setLocalMuted(boolean muted);
+
+    boolean isLocalMuted();
+
     void setMode(Settings.InputMode mode);
 
     void setVadMode(Settings.VadMode mode);
 
-    /** Voice-activation volume-gate threshold in dBFS. */
+    /** Volume-gate threshold on {@link InputLevel}'s scale. */
     void setThresholdDb(double db);
 
     /** Speech-probability threshold (0..1) for Automatic/Hybrid modes. */
@@ -50,12 +59,19 @@ public interface VoiceInput extends Microphone {
 
     void setPushToTalk(boolean pressed);
 
-    /** Receives the live input level in dBFS, once per captured frame. */
+    /** Receives the live input level on {@link InputLevel}'s scale, once per captured frame. */
     void setLevelListener(Consumer<Double> listener);
 
     /** Receives local transmit-state transitions (talking / silent). */
     void setTalkListener(Consumer<Boolean> listener);
 
+    /**
+     * Receives every frame that is actually transmitted, for local monitoring: the audio
+     * after pre-processing and gating, including the pre-roll replayed when the gate opens.
+     * Nothing is delivered while the gate is shut or the microphone is muted.
+     */
+    void setMonitorListener(AudioFrameListener listener);
+
     /** Called when speech is detected while the microphone is muted. */
     void setMutedTalkListener(Runnable listener);
 }

ts3-client/core/src/main/java/com/ts3client/audio/vad/LinearPrediction.java

@@ -0,0 +1,99 @@
+package com.ts3client.audio.vad;
+
+import static com.ts3client.audio.vad.VadConstants.NUM_LPC_COEFFICIENTS;
+
+/**
+ * Linear-prediction analysis for the pitch search, ported from WebRTC's
+ * {@code rnn_vad/lp_residual.cc}.
+ *
+ * <p>Whitening the signal before searching for a pitch makes the auto-correlation peak at
+ * the true period rather than at whichever formant happens to dominate.
+ */
+final class LinearPrediction {
+
+    private final float[] autoCorr = new float[NUM_LPC_COEFFICIENTS];
+    private final float[] reflection = new float[NUM_LPC_COEFFICIENTS - 1];
+
+    /** Computes the 5 post-processed inverse-filter coefficients for {@code x}. */
+    void computeLpcCoefficients(float[] x, float[] lpcCoeffs) {
+        for (int lag = 0; lag < NUM_LPC_COEFFICIENTS; lag++) {
+            float sum = 0;
+            for (int i = 0; i < x.length - lag; i++) {
+                sum += x[i] * x[i + lag];
+            }
+            autoCorr[lag] = sum;
+        }
+        if (autoCorr[0] == 0.0f) { // Empty frame.
+            java.util.Arrays.fill(lpcCoeffs, 0.0f);
+            return;
+        }
+
+        // Assume a -40 dB white noise floor.
+        autoCorr[0] *= 1.0001f;
+        autoCorr[1] -= autoCorr[1] * 0.000064f;
+        autoCorr[2] -= autoCorr[2] * 0.000256f;
+        autoCorr[3] -= autoCorr[3] * 0.000576f;
+        autoCorr[4] -= autoCorr[4] * 0.001024f;
+
+        java.util.Arrays.fill(reflection, 0.0f);
+        computeInitialInverseFilterCoefficients();
+
+        // Bandwidth expansion, then convolution with (1 + 0.8 z^-1).
+        reflection[0] *= 0.9f;
+        reflection[1] *= 0.9f * 0.9f;
+        reflection[2] *= 0.9f * 0.9f * 0.9f;
+        reflection[3] *= 0.9f * 0.9f * 0.9f * 0.9f;
+        final float c = 0.8f;
+        lpcCoeffs[0] = reflection[0] + c;
+        lpcCoeffs[1] = reflection[1] + c * reflection[0];
+        lpcCoeffs[2] = reflection[2] + c * reflection[1];
+        lpcCoeffs[3] = reflection[3] + c * reflection[2];
+        lpcCoeffs[4] = c * reflection[3];
+    }
+
+    /** Levinson&ndash;Durbin recursion over {@link #autoCorr}, writing {@link #reflection}. */
+    private void computeInitialInverseFilterCoefficients() {
+        float error = autoCorr[0];
+        for (int i = 0; i < NUM_LPC_COEFFICIENTS - 1; i++) {
+            float reflectionCoeff = 0;
+            for (int j = 0; j < i; j++) {
+                reflectionCoeff += reflection[j] * autoCorr[i - j];
+            }
+            reflectionCoeff += autoCorr[i + 1];
+
+            // Avoid dividing by numbers close to zero.
+            final float minErrorMagnitude = 1e-6f;
+            if (Math.abs(error) < minErrorMagnitude) {
+                error = Math.copySign(minErrorMagnitude, error);
+            }
+            reflectionCoeff /= -error;
+
+            reflection[i] = reflectionCoeff;
+            for (int j = 0; j < ((i + 1) >> 1); j++) {
+                float tmp1 = reflection[j];
+                float tmp2 = reflection[i - 1 - j];
+                reflection[j] = tmp1 + reflectionCoeff * tmp2;
+                reflection[i - 1 - j] = tmp2 + reflectionCoeff * tmp1;
+            }
+            error -= reflectionCoeff * reflectionCoeff * error;
+            if (error < 0.001f * autoCorr[0]) {
+                break;
+            }
+        }
+    }
+
+    /**
+     * Applies the inverse filter: {@code y[i] = x[i] + sum_j lpc[j] * x[i - 1 - j]},
+     * with the sum truncated near the start of the buffer.
+     */
+    static void computeLpResidual(float[] lpcCoeffs, float[] x, float[] y) {
+        for (int i = 0; i < x.length; i++) {
+            float sum = x[i];
+            int taps = Math.min(i, NUM_LPC_COEFFICIENTS);
+            for (int j = 0; j < taps; j++) {
+                sum += lpcCoeffs[j] * x[i - 1 - j];
+            }
+            y[i] = sum;
+        }
+    }
+}

ts3-client/core/src/main/java/com/ts3client/audio/vad/PitchEstimator.java

@@ -0,0 +1,329 @@
+package com.ts3client.audio.vad;
+
+import static com.ts3client.audio.vad.VadConstants.BUF_SIZE_12K;
+import static com.ts3client.audio.vad.VadConstants.FRAME_20MS_12K;
+import static com.ts3client.audio.vad.VadConstants.FRAME_20MS_24K;
+import static com.ts3client.audio.vad.VadConstants.INITIAL_NUM_LAGS_24K;
+import static com.ts3client.audio.vad.VadConstants.MAX_PITCH_24K;
+import static com.ts3client.audio.vad.VadConstants.MAX_PITCH_48K;
+import static com.ts3client.audio.vad.VadConstants.MIN_PITCH_24K;
+import static com.ts3client.audio.vad.VadConstants.MIN_PITCH_48K;
+import static com.ts3client.audio.vad.VadConstants.NUM_LAGS_12K;
+import static com.ts3client.audio.vad.VadConstants.REFINE_NUM_LAGS_24K;
+
+/**
+ * Pitch period estimation for {@code rnn_vad}, ported from WebRTC's
+ * {@code rnn_vad/pitch_search.cc} and {@code pitch_search_internal.cc}.
+ *
+ * <p>Three stages: a coarse search over the 12&nbsp;kHz decimated LP residual picks two
+ * candidates, those are refined against the 24&nbsp;kHz buffer, and finally sub-harmonics
+ * of the winner are tested so that an octave error can be corrected. The result is a
+ * period expressed at 48&nbsp;kHz, which is what the network was trained on.
+ *
+ * <p>Lags are stored inverted: index 0 corresponds to the maximum pitch period.
+ */
+final class PitchEstimator {
+
+    /**
+     * For each divisor k in [2, 15], the multiplier n such that n*T/k is a sub-harmonic
+     * worth checking alongside T/k, chosen so no multiple is visited twice.
+     */
+    private static final int[] SUB_HARMONIC_MULTIPLIERS =
+            {3, 2, 3, 2, 5, 2, 3, 2, 3, 2, 5, 2, 3, 2};
+
+    /** Thresholds on the initial period, computed as {@code [5*k*k for k in range(16)]}. */
+    private static final int[] INITIAL_PITCH_PERIOD_THRESHOLDS =
+            {20, 45, 80, 125, 180, 245, 320, 405, 500, 605, 720, 845, 980, 1125};
+
+    /** Number of pitch periods analysed either side of a candidate during refinement. */
+    private static final int PITCH_NEIGHBORHOOD_RADIUS = 2;
+
+    private final float[] pitchBuffer12k = new float[BUF_SIZE_12K];
+    private final float[] autoCorrelation12k = new float[NUM_LAGS_12K];
+    private final float[] yEnergy24k = new float[REFINE_NUM_LAGS_24K];
+    private final float[] autoCorrelation24k = new float[INITIAL_NUM_LAGS_24K];
+    private final int[] invertedLagsIndex = new int[2 * (2 * PITCH_NEIGHBORHOOD_RADIUS + 1)];
+    private int invertedLagsCount;
+
+    // Pitch tracking: the previous estimate biases the sub-harmonic decision.
+    private int lastPeriod48k;
+    private float lastStrength;
+
+    void reset() {
+        lastPeriod48k = 0;
+        lastStrength = 0;
+    }
+
+    /** Returns the pitch period at 48 kHz for the given 24 kHz LP residual buffer. */
+    int estimate(float[] pitchBuffer) {
+        // Coarse search at 12 kHz. WebRTC decimates without an anti-aliasing filter here;
+        // the refinement stage below is what recovers the accuracy.
+        for (int i = 0; i < BUF_SIZE_12K; i++) {
+            pitchBuffer12k[i] = pitchBuffer[2 * i];
+        }
+        computeAutoCorrelation12k();
+        long candidates = computePitchPeriod12kHz();
+        int best = (int) (candidates >> 32) * 2;
+        int secondBest = (int) candidates * 2;
+
+        computeSlidingFrameSquareEnergies24k(pitchBuffer);
+        int pitchLag48k = computePitchPeriod48kHz(pitchBuffer, best, secondBest);
+        computeExtendedPitchPeriod48kHz(pitchBuffer, MAX_PITCH_48K - pitchLag48k);
+        return lastPeriod48k;
+    }
+
+    /**
+     * {@code autoCorrelation12k[lag]} is the correlation of the most recent 20 ms with the
+     * frame starting {@code lag} samples into the buffer.
+     */
+    private void computeAutoCorrelation12k() {
+        final int refOffset = BUF_SIZE_12K - FRAME_20MS_12K;
+        for (int lag = 0; lag < NUM_LAGS_12K; lag++) {
+            float sum = 0;
+            for (int i = 0; i < FRAME_20MS_12K; i++) {
+                sum += pitchBuffer12k[refOffset + i] * pitchBuffer12k[lag + i];
+            }
+            autoCorrelation12k[lag] = sum;
+        }
+    }
+
+    /** Returns the best and second-best inverted lags packed into a long. */
+    private long computePitchPeriod12kHz() {
+        float denominator = 1.0f;
+        for (int i = 0; i < FRAME_20MS_12K + 1; i++) {
+            denominator += pitchBuffer12k[i] * pitchBuffer12k[i];
+        }
+
+        int bestLag = 0;
+        float bestNumerator = -1.0f;
+        float bestDenominator = 0.0f;
+        int secondLag = 1;
+        float secondNumerator = -1.0f;
+        float secondDenominator = 0.0f;
+
+        for (int invertedLag = 0; invertedLag < NUM_LAGS_12K; invertedLag++) {
+            // A pitch candidate must have positive correlation.
+            if (autoCorrelation12k[invertedLag] > 0.0f) {
+                float numerator = autoCorrelation12k[invertedLag] * autoCorrelation12k[invertedLag];
+                // Compare numerator/denominator ratios without dividing.
+                if (numerator * secondDenominator > secondNumerator * denominator) {
+                    if (numerator * bestDenominator > bestNumerator * denominator) {
+                        secondLag = bestLag;
+                        secondNumerator = bestNumerator;
+                        secondDenominator = bestDenominator;
+                        bestLag = invertedLag;
+                        bestNumerator = numerator;
+                        bestDenominator = denominator;
+                    } else {
+                        secondLag = invertedLag;
+                        secondNumerator = numerator;
+                        secondDenominator = denominator;
+                    }
+                }
+            }
+            // Slide the energy window to the next inverted lag.
+            float yOld = pitchBuffer12k[invertedLag];
+            float yNew = pitchBuffer12k[invertedLag + FRAME_20MS_12K];
+            denominator -= yOld * yOld;
+            denominator += yNew * yNew;
+            denominator = Math.max(0.0f, denominator);
+        }
+        return ((long) bestLag << 32) | (secondLag & 0xffffffffL);
+    }
+
+    /** Energy of the sliding 20 ms frame for every inverted lag. */
+    private void computeSlidingFrameSquareEnergies24k(float[] pitchBuffer) {
+        float yy = 0;
+        for (int i = 0; i < FRAME_20MS_24K; i++) {
+            yy += pitchBuffer[i] * pitchBuffer[i];
+        }
+        yEnergy24k[0] = yy;
+        for (int invertedLag = 0; invertedLag < MAX_PITCH_24K; invertedLag++) {
+            yy -= pitchBuffer[invertedLag] * pitchBuffer[invertedLag];
+            yy += pitchBuffer[invertedLag + FRAME_20MS_24K] * pitchBuffer[invertedLag + FRAME_20MS_24K];
+            yy = Math.max(1.0f, yy);
+            yEnergy24k[invertedLag + 1] = yy;
+        }
+    }
+
+    /** Correlation of the most recent 20 ms with the frame at {@code invertedLag}. */
+    private static float autoCorrelation(int invertedLag, float[] pitchBuffer) {
+        float sum = 0;
+        for (int i = 0; i < FRAME_20MS_24K; i++) {
+            sum += pitchBuffer[MAX_PITCH_24K + i] * pitchBuffer[invertedLag + i];
+        }
+        return sum;
+    }
+
+    /**
+     * Recomputes the auto-correlation around both candidates at 24 kHz and returns the
+     * strongest inverted lag, pseudo-interpolated to 48 kHz.
+     */
+    private int computePitchPeriod48kHz(float[] pitchBuffer, int bestCandidate, int secondCandidate) {
+        invertedLagsCount = 0;
+        // Order the two neighbourhoods so the first precedes the second.
+        boolean swap = bestCandidate > secondCandidate;
+        int firstCenter = swap ? secondCandidate : bestCandidate;
+        int secondCenter = swap ? bestCandidate : secondCandidate;
+        int r1min = Math.max(firstCenter - PITCH_NEIGHBORHOOD_RADIUS, 0);
+        int r1max = Math.min(firstCenter + PITCH_NEIGHBORHOOD_RADIUS, INITIAL_NUM_LAGS_24K - 1);
+        int r2min = Math.max(secondCenter - PITCH_NEIGHBORHOOD_RADIUS, 0);
+        int r2max = Math.min(secondCenter + PITCH_NEIGHBORHOOD_RADIUS, INITIAL_NUM_LAGS_24K - 1);
+
+        if (r1max + 1 >= r2min) { // Overlapping or adjacent ranges.
+            computeAutoCorrelationRange(pitchBuffer, r1min, r2max);
+        } else {
+            computeAutoCorrelationRange(pitchBuffer, r1min, r1max);
+            computeAutoCorrelationRange(pitchBuffer, r2min, r2max);
+        }
+
+        int bestInvertedLag = 0;
+        float bestNumerator = -1.0f;
+        float bestDenominator = 0.0f;
+        for (int i = 0; i < invertedLagsCount; i++) {
+            int invertedLag = invertedLagsIndex[i];
+            if (autoCorrelation24k[invertedLag] > 0.0f) {
+                float numerator = autoCorrelation24k[invertedLag] * autoCorrelation24k[invertedLag];
+                float denominator = yEnergy24k[invertedLag];
+                if (numerator * bestDenominator > bestNumerator * denominator) {
+                    bestInvertedLag = invertedLag;
+                    bestNumerator = numerator;
+                    bestDenominator = denominator;
+                }
+            }
+        }
+
+        if (bestInvertedLag == 0 || bestInvertedLag >= INITIAL_NUM_LAGS_24K - 1) {
+            return bestInvertedLag * 2; // Cannot interpolate at the boundaries.
+        }
+        int offset = pseudoInterpolationOffset(
+                autoCorrelation24k[bestInvertedLag + 1],
+                autoCorrelation24k[bestInvertedLag],
+                autoCorrelation24k[bestInvertedLag - 1]);
+        return 2 * bestInvertedLag + offset;
+    }
+
+    private void computeAutoCorrelationRange(float[] pitchBuffer, int min, int max) {
+        // The pseudo-interpolation reads one lag either side, so zero those rather than
+        // clearing the whole array.
+        if (min > 0) {
+            autoCorrelation24k[min - 1] = 0.0f;
+        }
+        if (max < INITIAL_NUM_LAGS_24K - 1) {
+            autoCorrelation24k[max + 1] = 0.0f;
+        }
+        for (int invertedLag = min; invertedLag <= max; invertedLag++) {
+            autoCorrelation24k[invertedLag] = autoCorrelation(invertedLag, pitchBuffer);
+            invertedLagsIndex[invertedLagsCount++] = invertedLag;
+        }
+    }
+
+    /** Returns a lag correction in {-1, 0, +1} based on the neighbouring correlations. */
+    private static int pseudoInterpolationOffset(float prev, float curr, float next) {
+        if ((next - prev) > 0.7f * (curr - prev)) {
+            return 1;
+        } else if ((prev - next) > 0.7f * (curr - next)) {
+            return -1;
+        }
+        return 0;
+    }
+
+    /** Refines {@code lag} (24 kHz) to a 48 kHz lag using pseudo-interpolation. */
+    private static int pseudoInterpolationLagPitchBuf(int lag, float[] pitchBuffer) {
+        int offset = 0;
+        if (lag > 0 && lag < MAX_PITCH_24K) {
+            int invertedLag = MAX_PITCH_24K - lag;
+            offset = pseudoInterpolationOffset(
+                    autoCorrelation(invertedLag + 1, pitchBuffer),
+                    autoCorrelation(invertedLag, pitchBuffer),
+                    autoCorrelation(invertedLag - 1, pitchBuffer));
+        }
+        return 2 * lag + offset;
+    }
+
+    /** Same as {@code round(multiplier * pitchPeriod / divisor)}. */
+    private static int alternativePitchPeriod(int pitchPeriod, int multiplier, int divisor) {
+        return (2 * multiplier * pitchPeriod + divisor) / (2 * divisor);
+    }
+
+    /**
+     * Tests sub-harmonics of the refined period and keeps the strongest, then stores the
+     * winner in {@link #lastPeriod48k}/{@link #lastStrength}.
+     */
+    private void computeExtendedPitchPeriod48kHz(float[] pitchBuffer, int initialPeriod48k) {
+        final float xEnergy = yEnergy24k[MAX_PITCH_24K];
+
+        int bestPeriod = Math.min(initialPeriod48k / 2, MAX_PITCH_24K - 1);
+        float bestXy = autoCorrelation(MAX_PITCH_24K - bestPeriod, pitchBuffer);
+        float bestYEnergy = yEnergy24k[MAX_PITCH_24K - bestPeriod];
+        float bestStrength = pitchStrength(bestXy, bestYEnergy, xEnergy);
+
+        final int initialPeriod = bestPeriod;
+        final float initialStrength = bestStrength;
+        // The tracked pitch is kept at 48 kHz but compared at 24 kHz.
+        final int lastPeriod = lastPeriod48k / 2;
+
+        // Largest divisor for which the alternative period is still above the minimum.
+        int maxPeriodDivisor = (2 * initialPeriod) / (2 * MIN_PITCH_24K - 1);
+        for (int periodDivisor = 2; periodDivisor <= maxPeriodDivisor; periodDivisor++) {
+            int alternativePeriod = alternativePitchPeriod(initialPeriod, 1, periodDivisor);
+            int dualPeriod = alternativePitchPeriod(
+                    initialPeriod, SUB_HARMONIC_MULTIPLIERS[periodDivisor - 2], periodDivisor);
+            // Special case: for a divisor of 2 the sub-harmonic can exceed the pitch range.
+            if (periodDivisor == 2 && dualPeriod > MAX_PITCH_24K) {
+                dualPeriod = initialPeriod;
+            }
+
+            // Score the candidate together with its sub-harmonic.
+            float xyPrimary = autoCorrelation(MAX_PITCH_24K - alternativePeriod, pitchBuffer);
+            float xySecondary = autoCorrelation(MAX_PITCH_24K - dualPeriod, pitchBuffer);
+            float xy = 0.5f * (xyPrimary + xySecondary);
+            float yy = 0.5f * (yEnergy24k[MAX_PITCH_24K - alternativePeriod]
+                    + yEnergy24k[MAX_PITCH_24K - dualPeriod]);
+            float alternativeStrength = pitchStrength(xy, yy, xEnergy);
+
+            if (isAlternativeStronger(lastPeriod, initialPeriod, initialStrength,
+                    alternativePeriod, alternativeStrength, periodDivisor)) {
+                bestPeriod = alternativePeriod;
+                bestStrength = alternativeStrength;
+                bestXy = xy;
+                bestYEnergy = yy;
+            }
+        }
+
+        bestXy = Math.max(0.0f, bestXy);
+        float finalStrength = (bestYEnergy <= bestXy) ? 1.0f : bestXy / (bestYEnergy + 1.0f);
+        finalStrength = Math.min(bestStrength, finalStrength);
+
+        lastPeriod48k = Math.max(MIN_PITCH_48K, pseudoInterpolationLagPitchBuf(bestPeriod, pitchBuffer));
+        lastStrength = finalStrength;
+    }
+
+    private static float pitchStrength(float xy, float yEnergy, float xEnergy) {
+        return xy / (float) Math.sqrt(1.0f + xEnergy * yEnergy);
+    }
+
+    private boolean isAlternativeStronger(int lastPeriod, int initialPeriod, float initialStrength,
+                                          int alternativePeriod, float alternativeStrength,
+                                          int periodDivisor) {
+        // Pitch tracking: a candidate close to the previous estimate clears a lower bar.
+        float lowerThresholdTerm = 0.0f;
+        int distance = Math.abs(alternativePeriod - lastPeriod);
+        if (distance <= 1) {
+            lowerThresholdTerm = lastStrength;
+        } else if (distance == 2
+                && initialPeriod > INITIAL_PITCH_PERIOD_THRESHOLDS[periodDivisor - 2]) {
+            lowerThresholdTerm = 0.5f * lastStrength;
+        }
+
+        // Higher frequencies get a stricter threshold: short-term correlations bias
+        // the search towards them and cause false positives.
+        float threshold = Math.max(0.3f, 0.7f * initialStrength - lowerThresholdTerm);
+        if (alternativePeriod < 3 * MIN_PITCH_24K) {
+            threshold = Math.max(0.4f, 0.85f * initialStrength - lowerThresholdTerm);
+        } else if (alternativePeriod < 2 * MIN_PITCH_24K) {
+            threshold = Math.max(0.5f, 0.9f * initialStrength - lowerThresholdTerm);
+        }
+        return alternativeStrength > threshold;
+    }
+}

ts3-client/core/src/main/java/com/ts3client/audio/vad/RealFft.java

@@ -0,0 +1,224 @@
+package com.ts3client.audio.vad;
+
+/**
+ * Real-input FFT for the {@code rnn_vad} spectral analysis.
+ *
+ * <p>The transform length is 480 (a 20&nbsp;ms frame at 24&nbsp;kHz), which is not a
+ * power of two, so the shared radix-2 {@code Fft} cannot be used. This is a
+ * mixed-radix Cooley&ndash;Tukey complex FFT (radices 2, 3, 4 and 5, with a generic
+ * DFT for any other factor) wrapped in the standard real-input trick: an
+ * {@code n}-point real transform is computed as an {@code n/2}-point complex one
+ * followed by a split step.
+ *
+ * <p>Output uses the packed layout WebRTC's PFFFT produces, which the band
+ * correlator indexes directly:
+ * <pre>
+ *   out[0]     = Re(X[0])      (DC)
+ *   out[1]     = Re(X[n/2])    (Nyquist)
+ *   out[2k]    = Re(X[k])
+ *   out[2k+1]  = Im(X[k])      for k in [1, n/2)
+ * </pre>
+ */
+final class RealFft {
+
+    private final int size;
+    private final int half;
+
+    // Twiddles for the complex sub-transform and for the real split step.
+    private final float[] halfRe;
+    private final float[] halfIm;
+    private final float[] splitCos;
+    private final float[] splitSin;
+
+    private final ComplexFft complexFft;
+
+    RealFft(int size) {
+        if (size < 2 || (size & 1) != 0) {
+            throw new IllegalArgumentException("Real FFT length must be even: " + size);
+        }
+        this.size = size;
+        this.half = size / 2;
+        this.halfRe = new float[half];
+        this.halfIm = new float[half];
+        this.complexFft = new ComplexFft(half);
+
+        this.splitCos = new float[half / 2 + 1];
+        this.splitSin = new float[half / 2 + 1];
+        for (int k = 0; k <= half / 2; k++) {
+            double angle = -2.0 * Math.PI * k / size;
+            splitCos[k] = (float) Math.cos(angle);
+            splitSin[k] = (float) Math.sin(angle);
+        }
+    }
+
+    int size() {
+        return size;
+    }
+
+    /**
+     * Transforms {@code in} ({@link #size} real samples) into {@code out}
+     * ({@link #size} floats in the packed layout described above).
+     */
+    void forward(float[] in, float[] out) {
+        // Pack the real signal as half/2 complex samples: z[i] = x[2i] + j*x[2i+1].
+        for (int i = 0; i < half; i++) {
+            halfRe[i] = in[2 * i];
+            halfIm[i] = in[2 * i + 1];
+        }
+        complexFft.forward(halfRe, halfIm);
+
+        // Split Z into the transforms of the even and odd sample sequences, then
+        // recombine them into the spectrum of the original real signal.
+        out[0] = halfRe[0] + halfIm[0];
+        out[1] = halfRe[0] - halfIm[0];
+        for (int k = 1; k <= half / 2; k++) {
+            int mirror = half - k;
+
+            // Even part: hermitian-symmetric average; odd part: the difference.
+            float evenRe = 0.5f * (halfRe[k] + halfRe[mirror]);
+            float evenIm = 0.5f * (halfIm[k] - halfIm[mirror]);
+            float oddRe = 0.5f * (halfIm[k] + halfIm[mirror]);
+            float oddIm = -0.5f * (halfRe[k] - halfRe[mirror]);
+
+            float c = splitCos[k];
+            float s = splitSin[k];
+            float twRe = oddRe * c - oddIm * s;
+            float twIm = oddRe * s + oddIm * c;
+
+            float re = evenRe + twRe;
+            float im = evenIm + twIm;
+            out[2 * k] = re;
+            out[2 * k + 1] = im;
+
+            if (mirror != k) {
+                // X[n/2 - k] is the conjugate-mirrored companion of X[k].
+                out[2 * mirror] = evenRe - twRe;
+                out[2 * mirror + 1] = -(evenIm - twIm);
+            }
+        }
+    }
+
+    /**
+     * Mixed-radix complex FFT, decimation in time.
+     *
+     * <p>A transform of length {@code n = r * m} is computed by transforming the {@code r}
+     * interleaved subsequences of length {@code m} and combining them:
+     * {@code X[k1*m + k2] = sum_j (W_n^(j*k2) * X_j[k2]) * W_r^(j*k1)}.
+     *
+     * <p>The recursion is expressed directly rather than as an iterative digit-reversed
+     * loop, which keeps it correct for any factorisation. Scratch buffers are allocated
+     * once per recursion level so no transform allocates.
+     */
+    static final class ComplexFft {
+
+        private final int n;
+        private final float[] cosTable;
+        private final float[] sinTable;
+        private final float[][] scratchRe;
+        private final float[][] scratchIm;
+        private final float[] dftRe;
+        private final float[] dftIm;
+
+        ComplexFft(int n) {
+            this.n = n;
+            this.cosTable = new float[n];
+            this.sinTable = new float[n];
+            for (int i = 0; i < n; i++) {
+                double angle = -2.0 * Math.PI * i / n;
+                cosTable[i] = (float) Math.cos(angle);
+                sinTable[i] = (float) Math.sin(angle);
+            }
+            int depth = 0;
+            int maxRadix = 1;
+            for (int rest = n; rest > 1; depth++) {
+                int r = smallestFactor(rest);
+                maxRadix = Math.max(maxRadix, r);
+                rest /= r;
+            }
+            this.scratchRe = new float[depth + 1][n];
+            this.scratchIm = new float[depth + 1][n];
+            this.dftRe = new float[maxRadix];
+            this.dftIm = new float[maxRadix];
+        }
+
+        /** Transforms {@code re}/{@code im} of length {@code n} in place. */
+        void forward(float[] re, float[] im) {
+            transform(re, im, 0, 1, n, scratchRe[0], scratchIm[0], 0, 1);
+            System.arraycopy(scratchRe[0], 0, re, 0, n);
+            System.arraycopy(scratchIm[0], 0, im, 0, n);
+        }
+
+        /**
+         * Transforms the {@code len} samples starting at {@code inOff} with the given
+         * {@code stride}, writing the spectrum to {@code outRe}/{@code outIm} at
+         * {@code outOff}.
+         */
+        private void transform(float[] inRe, float[] inIm, int inOff, int stride, int len,
+                               float[] outRe, float[] outIm, int outOff, int depth) {
+            if (len == 1) {
+                outRe[outOff] = inRe[inOff];
+                outIm[outOff] = inIm[inOff];
+                return;
+            }
+            int r = smallestFactor(len);
+            int m = len / r;
+
+            // Sub-transforms of the r interleaved subsequences, laid out end to end.
+            float[] subRe = scratchRe[depth];
+            float[] subIm = scratchIm[depth];
+            for (int j = 0; j < r; j++) {
+                transform(inRe, inIm, inOff + j * stride, stride * r, m,
+                        subRe, subIm, outOff + j * m, depth + 1);
+            }
+
+            // Twiddle step for this transform size, expressed in top-level table units.
+            int unit = n / len;
+            for (int k2 = 0; k2 < m; k2++) {
+                for (int j = 0; j < r; j++) {
+                    int idx = outOff + j * m + k2;
+                    int t = (j * k2 * unit) % n;
+                    float c = cosTable[t];
+                    float s = sinTable[t];
+                    dftRe[j] = subRe[idx] * c - subIm[idx] * s;
+                    dftIm[j] = subRe[idx] * s + subIm[idx] * c;
+                }
+                combine(outRe, outIm, outOff + k2, m, r);
+            }
+        }
+
+        /** Length-{@code r} DFT of {@code dftRe}/{@code dftIm}, written with stride {@code m}. */
+        private void combine(float[] outRe, float[] outIm, int outOff, int m, int r) {
+            switch (r) {
+                case 2 -> {
+                    outRe[outOff] = dftRe[0] + dftRe[1];
+                    outIm[outOff] = dftIm[0] + dftIm[1];
+                    outRe[outOff + m] = dftRe[0] - dftRe[1];
+                    outIm[outOff + m] = dftIm[0] - dftIm[1];
+                }
+                default -> {
+                    int unit = n / r;
+                    for (int k1 = 0; k1 < r; k1++) {
+                        float sumRe = 0;
+                        float sumIm = 0;
+                        for (int j = 0; j < r; j++) {
+                            int t = (j * k1 % r) * unit;
+                            float c = cosTable[t];
+                            float s = sinTable[t];
+                            sumRe += dftRe[j] * c - dftIm[j] * s;
+                            sumIm += dftRe[j] * s + dftIm[j] * c;
+                        }
+                        outRe[outOff + k1 * m] = sumRe;
+                        outIm[outOff + k1 * m] = sumIm;
+                    }
+                }
+            }
+        }
+
+        private static int smallestFactor(int v) {
+            for (int f = 2; f * f <= v; f++) {
+                if (v % f == 0) return f;
+            }
+            return v;
+        }
+    }
+}

ts3-client/core/src/main/java/com/ts3client/audio/vad/RnnNetwork.java

@@ -0,0 +1,203 @@
+package com.ts3client.audio.vad;
+
+/**
+ * The {@code rnn_vad} network: a 42→24 dense layer, a 24-unit GRU and a 24→1
+ * dense output. Ported from WebRTC's {@code rnn_vad/rnn.cc}, {@code rnn_fc.cc} and
+ * {@code rnn_gru.cc}, using the activation approximations from RNNoise.
+ *
+ * <p>The GRU carries state between frames, so the caller must feed frames in order and
+ * {@link #reset()} on a discontinuity. Silence resets the state, matching WebRTC.
+ */
+final class RnnNetwork {
+
+    private static final int INPUT_SIZE = 42;
+    private static final int FC1_SIZE = 24;
+    private static final int GRU_SIZE = 24;
+    private static final int NUM_GATES = 3; // update, reset, output
+
+    private final float[] fc1Weights;   // [output][input]
+    private final float[] fc1Bias;
+    private final float[] fc2Weights;
+    private final float[] fc2Bias;
+
+    private final float[] gruWeights;          // [gate][output][input]
+    private final float[] gruRecurrentWeights; // [gate][output][output]
+    private final float[] gruBias;             // [gate][output]
+
+    private final float[] fc1Output = new float[FC1_SIZE];
+    private final float[] state = new float[GRU_SIZE];
+    private final float[] update = new float[GRU_SIZE];
+    private final float[] resetGate = new float[GRU_SIZE];
+    private final float[] resetTimesState = new float[GRU_SIZE];
+
+    RnnNetwork() {
+        fc1Weights = transposeAndScale(RnnVadWeights.INPUT_DENSE_WEIGHTS, INPUT_SIZE, FC1_SIZE);
+        fc1Bias = scale(RnnVadWeights.INPUT_DENSE_BIAS);
+        // The output layer is 24x1, so its stored layout already matches.
+        fc2Weights = scale(RnnVadWeights.OUTPUT_DENSE_WEIGHTS);
+        fc2Bias = scale(RnnVadWeights.OUTPUT_DENSE_BIAS);
+        gruWeights = transposeGruTensor(RnnVadWeights.HIDDEN_GRU_WEIGHTS, FC1_SIZE, GRU_SIZE);
+        gruRecurrentWeights =
+                transposeGruTensor(RnnVadWeights.HIDDEN_GRU_RECURRENT_WEIGHTS, GRU_SIZE, GRU_SIZE);
+        gruBias = transposeGruTensor(RnnVadWeights.HIDDEN_GRU_BIAS, 1, GRU_SIZE);
+    }
+
+    void reset() {
+        java.util.Arrays.fill(state, 0.0f);
+    }
+
+    /**
+     * Returns the speech probability for a feature vector. When {@code silence} is set the
+     * state is cleared and zero is returned without running the network.
+     */
+    float computeVadProbability(float[] featureVector, boolean silence) {
+        if (silence) {
+            reset();
+            return 0.0f;
+        }
+        for (int o = 0; o < FC1_SIZE; o++) {
+            float x = fc1Bias[o] + dot(featureVector, fc1Weights, o * INPUT_SIZE, INPUT_SIZE);
+            fc1Output[o] = tansigApproximated(x);
+        }
+        computeGruOutput(fc1Output);
+        float x = fc2Bias[0] + dot(state, fc2Weights, 0, GRU_SIZE);
+        return sigmoidApproximated(x);
+    }
+
+    private void computeGruOutput(float[] input) {
+        final int strideWeights = FC1_SIZE * GRU_SIZE;
+        final int strideRecurrent = GRU_SIZE * GRU_SIZE;
+
+        // u = sigmoid(W_u.i + R_u.s + b_u)
+        computeGate(input, 0, 0, 0, update);
+        // r = sigmoid(W_r.i + R_r.s + b_r)
+        computeGate(input, GRU_SIZE, strideWeights, strideRecurrent, resetGate);
+
+        // s' = u.s + (1 - u).ReLU(W_s.i + R_s.(s.r) + b_s)
+        for (int o = 0; o < GRU_SIZE; o++) {
+            resetTimesState[o] = state[o] * resetGate[o];
+        }
+        for (int o = 0; o < GRU_SIZE; o++) {
+            float x = gruBias[2 * GRU_SIZE + o];
+            x += dot(input, gruWeights, 2 * strideWeights + o * FC1_SIZE, FC1_SIZE);
+            x += dot(resetTimesState, gruRecurrentWeights,
+                    2 * strideRecurrent + o * GRU_SIZE, GRU_SIZE);
+            state[o] = update[o] * state[o] + (1.0f - update[o]) * Math.max(0.0f, x);
+        }
+    }
+
+    private void computeGate(float[] input, int biasOffset, int weightsOffset,
+                             int recurrentOffset, float[] gate) {
+        for (int o = 0; o < GRU_SIZE; o++) {
+            float x = gruBias[biasOffset + o];
+            x += dot(input, gruWeights, weightsOffset + o * FC1_SIZE, FC1_SIZE);
+            x += dot(state, gruRecurrentWeights, recurrentOffset + o * GRU_SIZE, GRU_SIZE);
+            gate[o] = sigmoidApproximated(x);
+        }
+    }
+
+    private static float dot(float[] a, float[] weights, int weightsOffset, int len) {
+        float sum = 0;
+        for (int i = 0; i < len; i++) {
+            sum += a[i] * weights[weightsOffset + i];
+        }
+        return sum;
+    }
+
+    // ---- weight layout ----
+
+    private static float[] scale(byte[] src) {
+        float[] out = new float[src.length];
+        for (int i = 0; i < src.length; i++) {
+            out[i] = RnnVadWeights.SCALE * src[i];
+        }
+        return out;
+    }
+
+    /** Stored as {@code [input][output]}; the dot products want {@code [output][input]}. */
+    private static float[] transposeAndScale(byte[] src, int inputSize, int outputSize) {
+        float[] out = new float[src.length];
+        for (int o = 0; o < outputSize; o++) {
+            for (int i = 0; i < inputSize; i++) {
+                out[o * inputSize + i] = RnnVadWeights.SCALE * src[i * outputSize + o];
+            }
+        }
+        return out;
+    }
+
+    /**
+     * GRU tensors are stored as {@code [n][gate][output]} and are wanted as
+     * {@code [gate][output][n]}, where {@code n} is the input size (1 for the bias).
+     */
+    private static float[] transposeGruTensor(byte[] src, int n, int outputSize) {
+        float[] out = new float[src.length];
+        int strideSrc = NUM_GATES * outputSize;
+        int strideDst = n * outputSize;
+        for (int g = 0; g < NUM_GATES; g++) {
+            for (int o = 0; o < outputSize; o++) {
+                for (int i = 0; i < n; i++) {
+                    out[g * strideDst + o * n + i] =
+                            RnnVadWeights.SCALE * src[i * strideSrc + g * outputSize + o];
+                }
+            }
+        }
+        return out;
+    }
+
+    // ---- activations (RNNoise approximations, bit-compatible with WebRTC) ----
+
+    /** tanh sampled every 0.04, copied verbatim from RNNoise's {@code rnn_activations.h}. */
+    private static final float[] TANSIG_TABLE = {
+            0.000000f, 0.039979f, 0.079830f, 0.119427f, 0.158649f, 0.197375f, 0.235496f, 0.272905f,
+            0.309507f, 0.345214f, 0.379949f, 0.413644f, 0.446244f, 0.477700f, 0.507977f, 0.537050f,
+            0.564900f, 0.591519f, 0.616909f, 0.641077f, 0.664037f, 0.685809f, 0.706419f, 0.725897f,
+            0.744277f, 0.761594f, 0.777888f, 0.793199f, 0.807569f, 0.821040f, 0.833655f, 0.845456f,
+            0.856485f, 0.866784f, 0.876393f, 0.885352f, 0.893698f, 0.901468f, 0.908698f, 0.915420f,
+            0.921669f, 0.927473f, 0.932862f, 0.937863f, 0.942503f, 0.946806f, 0.950795f, 0.954492f,
+            0.957917f, 0.961090f, 0.964028f, 0.966747f, 0.969265f, 0.971594f, 0.973749f, 0.975743f,
+            0.977587f, 0.979293f, 0.980869f, 0.982327f, 0.983675f, 0.984921f, 0.986072f, 0.987136f,
+            0.988119f, 0.989027f, 0.989867f, 0.990642f, 0.991359f, 0.992020f, 0.992631f, 0.993196f,
+            0.993718f, 0.994199f, 0.994644f, 0.995055f, 0.995434f, 0.995784f, 0.996108f, 0.996407f,
+            0.996682f, 0.996937f, 0.997172f, 0.997389f, 0.997590f, 0.997775f, 0.997946f, 0.998104f,
+            0.998249f, 0.998384f, 0.998508f, 0.998623f, 0.998728f, 0.998826f, 0.998916f, 0.999000f,
+            0.999076f, 0.999147f, 0.999213f, 0.999273f, 0.999329f, 0.999381f, 0.999428f, 0.999472f,
+            0.999513f, 0.999550f, 0.999585f, 0.999617f, 0.999646f, 0.999673f, 0.999699f, 0.999722f,
+            0.999743f, 0.999763f, 0.999781f, 0.999798f, 0.999813f, 0.999828f, 0.999841f, 0.999853f,
+            0.999865f, 0.999875f, 0.999885f, 0.999893f, 0.999902f, 0.999909f, 0.999916f, 0.999923f,
+            0.999929f, 0.999934f, 0.999939f, 0.999944f, 0.999948f, 0.999952f, 0.999956f, 0.999959f,
+            0.999962f, 0.999965f, 0.999968f, 0.999970f, 0.999973f, 0.999975f, 0.999977f, 0.999978f,
+            0.999980f, 0.999982f, 0.999983f, 0.999984f, 0.999986f, 0.999987f, 0.999988f, 0.999989f,
+            0.999990f, 0.999990f, 0.999991f, 0.999992f, 0.999992f, 0.999993f, 0.999994f, 0.999994f,
+            0.999994f, 0.999995f, 0.999995f, 0.999996f, 0.999996f, 0.999996f, 0.999997f, 0.999997f,
+            0.999997f, 0.999997f, 0.999997f, 0.999998f, 0.999998f, 0.999998f, 0.999998f, 0.999998f,
+            0.999998f, 0.999999f, 0.999999f, 0.999999f, 0.999999f, 0.999999f, 0.999999f, 0.999999f,
+            0.999999f, 0.999999f, 0.999999f, 0.999999f, 0.999999f, 0.999999f, 1.000000f, 1.000000f,
+            1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f,
+            1.000000f
+    };
+
+    private static float tansigApproximated(float x) {
+        // Tests are reversed to catch NaNs.
+        if (!(x < 8.0f)) {
+            return 1.0f;
+        }
+        if (!(x > -8.0f)) {
+            return -1.0f;
+        }
+        float sign = 1.0f;
+        if (x < 0.0f) {
+            x = -x;
+            sign = -1.0f;
+        }
+        int i = (int) Math.floor(0.5f + 25 * x);
+        float y = TANSIG_TABLE[i];
+        // Newton step back to x's own scale (undoing the table's factor of 25).
+        x -= 0.04f * i;
+        y = y + x * (1.0f - y * y) * (1.0f - y * x);
+        return sign * y;
+    }
+
+    private static float sigmoidApproximated(float x) {
+        return 0.5f + 0.5f * tansigApproximated(0.5f * x);
+    }
+}

ts3-client/core/src/main/java/com/ts3client/audio/vad/RnnSpeechDetector.java

@@ -0,0 +1,140 @@
+package com.ts3client.audio.vad;
+
+import com.ts3client.audio.SpeechProbabilityDetector;
+
+/**
+ * {@link SpeechProbabilityDetector} backed by {@link RnnVad}, adapting an arbitrary
+ * capture rate and frame size to the detector's fixed 10 ms frames at 24 kHz.
+ *
+ * <p>Capture frames rarely divide into 10&nbsp;ms chunks exactly, so leftover samples are
+ * carried into the next call. The reported probability is that of the most recent complete
+ * 10&nbsp;ms frame; a capture frame long enough to span several of them advances the
+ * detector several times, exactly as feeding it directly would.
+ */
+public final class RnnSpeechDetector implements SpeechProbabilityDetector {
+
+    /** Half-band FIR used when decimating; long enough to keep aliasing out of the passband. */
+    private static final int FILTER_TAPS = 32;
+
+    private final RnnVad vad = new RnnVad();
+
+    private final int sampleRate;
+    private final boolean decimateByTwo;
+    private final float[] filterCoeffs;
+    private final float[] filterState;
+    private int filterPos;
+
+    /** Resampled samples not yet consumed as a whole 10 ms frame. */
+    private final float[] pending = new float[RnnVad.FRAME_SIZE];
+    private int pendingCount;
+
+    /** Fractional read position, for capture rates that are not a multiple of 24 kHz. */
+    private double resamplePos;
+
+    public RnnSpeechDetector(int sampleRate) {
+        this.sampleRate = sampleRate;
+        this.decimateByTwo = sampleRate == 2 * RnnVad.SAMPLE_RATE;
+        if (decimateByTwo) {
+            this.filterCoeffs = lowPass(FILTER_TAPS, 0.25);
+            this.filterState = new float[FILTER_TAPS];
+        } else {
+            this.filterCoeffs = null;
+            this.filterState = null;
+        }
+    }
+
+    @Override
+    public double process(float[] frame, int length) {
+        if (sampleRate == RnnVad.SAMPLE_RATE) {
+            feed(frame, 0, length, 1);
+        } else if (decimateByTwo) {
+            decimateAndFeed(frame, length);
+        } else {
+            resampleAndFeed(frame, length);
+        }
+        return vad.probability();
+    }
+
+    @Override
+    public double probability() {
+        return vad.probability();
+    }
+
+    @Override
+    public void reset() {
+        vad.reset();
+        pendingCount = 0;
+        resamplePos = 0;
+        filterPos = 0;
+        if (filterState != null) {
+            java.util.Arrays.fill(filterState, 0.0f);
+        }
+    }
+
+    /** Appends samples (taking every {@code step}-th) and runs the detector per full frame. */
+    private void feed(float[] src, int offset, int length, int step) {
+        for (int i = offset; i < offset + length; i += step) {
+            push(src[i]);
+        }
+    }
+
+    /** 48 kHz (the common case): low-pass, then keep every other sample. */
+    private void decimateAndFeed(float[] frame, int length) {
+        for (int i = 0; i < length; i++) {
+            filterState[filterPos] = frame[i];
+            filterPos = (filterPos + 1) % FILTER_TAPS;
+            if ((i & 1) == 1) {
+                float acc = 0;
+                int idx = filterPos;
+                for (int t = 0; t < FILTER_TAPS; t++) {
+                    acc += filterCoeffs[t] * filterState[idx];
+                    idx = (idx + 1) % FILTER_TAPS;
+                }
+                push(acc);
+            }
+        }
+    }
+
+    /**
+     * Any other capture rate. Linear interpolation is enough here: the detector's own
+     * analysis is far coarser than the resampling error.
+     */
+    private void resampleAndFeed(float[] frame, int length) {
+        double ratio = (double) sampleRate / RnnVad.SAMPLE_RATE;
+        while (resamplePos < length) {
+            int i = (int) resamplePos;
+            double frac = resamplePos - i;
+            float a = frame[i];
+            float b = frame[Math.min(i + 1, length - 1)];
+            push((float) ((1 - frac) * a + frac * b));
+            resamplePos += ratio;
+        }
+        resamplePos -= length;
+    }
+
+    private void push(float sample) {
+        pending[pendingCount++] = sample;
+        if (pendingCount == RnnVad.FRAME_SIZE) {
+            vad.process(pending, 0);
+            pendingCount = 0;
+        }
+    }
+
+    /** Windowed-sinc low-pass with the given normalised cutoff, scaled to unit DC gain. */
+    private static float[] lowPass(int taps, double cutoff) {
+        float[] h = new float[taps];
+        double centre = (taps - 1) / 2.0;
+        double sum = 0;
+        for (int i = 0; i < taps; i++) {
+            double t = i - centre;
+            double sinc = (t == 0) ? 2 * cutoff : Math.sin(2 * Math.PI * cutoff * t) / (Math.PI * t);
+            double window = 0.54 - 0.46 * Math.cos(2 * Math.PI * i / (taps - 1)); // Hamming
+            h[i] = (float) (sinc * window);
+            sum += h[i];
+        }
+        for (int i = 0; i < taps; i++) {
+            h[i] /= (float) sum;
+        }
+        return h;
+    }
+}

ts3-client/core/src/main/java/com/ts3client/audio/vad/RnnVad.java

@@ -0,0 +1,103 @@
+package com.ts3client.audio.vad;
+
+import static com.ts3client.audio.vad.VadConstants.BUF_SIZE_24K;
+import static com.ts3client.audio.vad.VadConstants.FEATURE_VECTOR_SIZE;
+import static com.ts3client.audio.vad.VadConstants.FRAME_10MS_24K;
+import static com.ts3client.audio.vad.VadConstants.FRAME_20MS_24K;
+import static com.ts3client.audio.vad.VadConstants.MAX_PITCH_24K;
+import static com.ts3client.audio.vad.VadConstants.NUM_LPC_COEFFICIENTS;
+
+/**
+ * WebRTC's {@code rnn_vad} speech-probability detector, ported to Java.
+ *
+ * <p>This is the detector the TeamSpeak 3 client uses for its "Automatic" and "Hybrid"
+ * voice-activation modes: TS3 links the same network with byte-identical weights, so at a
+ * given threshold this gates on the same frames theirs does.
+ *
+ * <p>Feed exactly {@link VadConstants#FRAME_10MS_24K} samples of 24&nbsp;kHz mono audio in
+ * [-1, 1] per call, in order. Combines {@code features_extraction.cc} and {@code rnn.cc}.
+ */
+public final class RnnVad {
+
+    /** Samples per call: 10 ms at 24 kHz. */
+    public static final int FRAME_SIZE = FRAME_10MS_24K;
+
+    /** Sample rate this detector expects. */
+    public static final int SAMPLE_RATE = VadConstants.SAMPLE_RATE_24K;
+
+    /**
+     * WebRTC's audio processing carries float samples on the 16-bit integer scale, and the
+     * network's thresholds (the silence cut-off, the pitch energy floor) are calibrated for
+     * it. Callers pass [-1, 1], so scale on the way in.
+     */
+    private static final float INT16_SCALE = 32768.0f;
+
+    /**
+     * Rolling window of 24 kHz samples: one maximum pitch period of history followed by
+     * the most recent 20 ms.
+     */
+    private final float[] pitchBuffer = new float[BUF_SIZE_24K];
+    private final float[] lpResidual = new float[BUF_SIZE_24K];
+    private final float[] lpcCoeffs = new float[NUM_LPC_COEFFICIENTS];
+    private final float[] featureVector = new float[FEATURE_VECTOR_SIZE];
+
+    private final LinearPrediction linearPrediction = new LinearPrediction();
+    private final PitchEstimator pitchEstimator = new PitchEstimator();
+    private final SpectralFeatures spectralFeatures = new SpectralFeatures();
+    private final RnnNetwork network = new RnnNetwork();
+
+    private float probability;
+    private int pitchPeriod48k;
+
+    /** Clears all history. Call on a capture discontinuity. */
+    public void reset() {
+        java.util.Arrays.fill(pitchBuffer, 0.0f);
+        pitchEstimator.reset();
+        pitchPeriod48k = 0;
+        spectralFeatures.reset();
+        network.reset();
+        probability = 0.0f;
+    }
+
+    /** Speech probability in [0, 1] from the most recent {@link #process} call. */
+    public float probability() {
+        return probability;
+    }
+
+    /**
+     * Pitch period of the most recent frame, expressed at 48&nbsp;kHz as the network's
+     * feature is. Exposed for diagnostics and tests.
+     */
+    public int pitchPeriod48kHz() {
+        return pitchPeriod48k;
+    }
+
+    /**
+     * Analyses one 10 ms frame and returns the speech probability in [0, 1].
+     *
+     * @param frame  mono samples in [-1, 1]
+     * @param offset index of the first sample
+     */
+    public float process(float[] frame, int offset) {
+        System.arraycopy(pitchBuffer, FRAME_10MS_24K, pitchBuffer, 0, BUF_SIZE_24K - FRAME_10MS_24K);
+        int start = BUF_SIZE_24K - FRAME_10MS_24K;
+        for (int i = 0; i < FRAME_10MS_24K; i++) {
+            pitchBuffer[start + i] = frame[offset + i] * INT16_SCALE;
+        }
+
+        // Search the pitch on the whitened signal so formants don't dominate the peak.
+        linearPrediction.computeLpcCoefficients(pitchBuffer, lpcCoeffs);
+        LinearPrediction.computeLpResidual(lpcCoeffs, pitchBuffer, lpResidual);
+        pitchPeriod48k = pitchEstimator.estimate(lpResidual);
+        // Normalisation based on the training-set statistics.
+        featureVector[FEATURE_VECTOR_SIZE - 2] = 0.01f * (pitchPeriod48k - 300);
+
+        // Compare the most recent 20 ms against the 20 ms one pitch period earlier.
+        int laggedOffset = MAX_PITCH_24K - pitchPeriod48k / 2;
+        boolean silence = spectralFeatures.checkSilenceComputeFeatures(
+                pitchBuffer, BUF_SIZE_24K - FRAME_20MS_24K, pitchBuffer, laggedOffset, featureVector);
+
+        probability = network.computeVadProbability(featureVector, silence);
+        return probability;
+    }
+}

ts3-client/core/src/main/java/com/ts3client/audio/vad/RnnVadWeights.java

@@ -0,0 +1,273 @@
+package com.ts3client.audio.vad;
+
+/**
+ * Quantised weights of WebRTC's {@code rnn_vad} network, copied verbatim from
+ * {@code third_party/rnnoise/src/rnn_vad_weights.cc} (BSD, Xiph/Jean-Marc Valin).
+ *
+ * <p>These are the same 4585 bytes the TeamSpeak 3 client links in, so our detector
+ * produces the same speech probabilities theirs does.
+ *
+ * <p>Values are stored quantised; {@link #SCALE} converts them to float.
+ */
+final class RnnVadWeights {
+
+    /** Dequantisation factor applied to every table below. */
+    static final float SCALE = 1.0f / 256.0f;
+
+    /** FC1 weights, laid out as [input][output] (42 x 24). */
+    static final byte[] INPUT_DENSE_WEIGHTS = {
+        -10, 0, -3, 1, -8, -6, 3, -13, 1, 0, -3, -7, -5, -3, 6, -1, -6, 0, -6, -4, -1, -2, 1, 1, -7, 2,
+        21, 10, -5, -20, 24, 23, 37, 8, -2, 33, -6, 22, 13, -2, 50, 8, 13, 1, -15, 30, -10, 30, 0, 3, 5,
+        27, 1, 4, -3, 41, 56, 35, -2, 49, -13, 11, 13, -2, -47, 5, -16, -60, -15, 77, -17, 26, -3, 14,
+        -21, 19, -5, -19, -13, 0, 10, 14, 9, 31, -13, -41, -10, 4, 22, 18, -48, -6, -10, 62, -3, -18,
+        -14, 12, 26, -28, 3, 14, 25, -13, -19, 6, 5, 36, -3, -65, -12, 0, 31, -7, -9, 101, -4, 26, 16,
+        17, -12, -12, 14, -36, -3, 5, -15, 21, 2, 30, -3, 38, -4, 1, -6, 7, -7, 14, 38, -22, -30, -3,
+        -7, 3, -39, -70, -126, 25, 34, 94, -67, -22, -33, 83, -47, -118, 4, 70, 33, 25, 62, -128, -76,
+        -118, -113, 49, -12, -100, -18, -114, -33, 43, 32, 61, 40, -9, -106, 2, 36, -100, -40, -5, 20,
+        -75, 61, -51, -9, 126, -27, -52, 5, -24, -21, -126, -114, -12, 15, 106, -2, 73, -125, 50, 13,
+        -120, 35, 35, 4, -61, 29, -124, 6, -53, -69, -125, 64, -89, 36, -107, -103, -7, 27, 121, 69, 77,
+        -35, 35, 95, -125, -49, 97, -45, -43, -23, 23, -28, -65, -118, 2, 8, -126, 27, -97, 92, 5, 55,
+        82, 17, -57, -115, 37, 8, -106, -46, 41, -2, 21, -44, 8, -73, -58, -39, 34, 89, -95, 95, -117,
+        120, -58, 31, 123, 1, -32, -109, -110, 60, -120, -43, -74, 5, 91, 26, 21, 114, 82, -83, -126,
+        123, 22, -16, -67, 25, -83, 46, 48, -34, -121, -124, -63, -35, -9, 31, 82, 123, 6, -3, 117, 93,
+        -2, -13, -36, 124, -112, -6, -102, -5, -33, -15, 44, -69, -127, -23, -40, -34, -85, 68, 83, -1,
+        40, 8, 84, 118, -58, -55, -102, 123, -55, -14, -123, 44, -63, -14, 21, 35, 16, 24, -126, -13,
+        -114, 35, 20, -36, 61, -9, 97, 34, 19, -32, -109, 76, -104, 99, -119, 45, -125, -51, -28, -8,
+        -69, -8, 125, -45, -93, 113, 103, -41, -82, 52, 7, 126, 0, -40, 104, 55, -58, 17, -124, -93,
+        -58, 8, -45, 1, 56, -123, 108, -47, -23, 115, 127, 17, -68, -13, 116, -82, -44, 45, 67, -120,
+        -101, -15, -125, 120, -113, 17, -48, -73, 126, -64, -86, -118, -19, 112, -1, -66, -27, -62, 121,
+        -86, -58, 50, 89, -38, -75, 95, -111, 12, -113, 2, -68, 2, -94, -121, 91, -5, 0, 79, 43, -7,
+        -18, 79, 35, -38, 47, 1, -45, 83, -50, 102, 32, 55, -96, 15, -122, -69, 45, -27, 91, -62, -30,
+        46, -95, 22, -72, -97, -1, 14, -122, 28, 127, 61, -126, 121, 9, 68, -120, 49, -60, 90, 3, 43,
+        68, 54, 34, -10, 28, 21, -24, -54, 22, -113, -12, 82, -2, -17, -9, 127, 8, 116, -92, 0, -70,
+        -33, 123, 66, 116, -74, -4, 74, -72, -22, -47, 1, -83, -60, -124, 1, 122, -57, -43, 49, 40,
+        -126, -128, -8, -29, 28, -24, -123, -121, -70, -93, -37, -126, 11, -125, -37, 11, -31, -51,
+        -124, 116, -128, 8, -25, 109, 75, -12, 7, 8, 10, 117, 124, -128, -128, 29, -26, 101, 21, -128,
+        87, 8, -39, 23, -128, 127, -127, 74, -55, 74, 112, 127, 4, 55, 44, -92, 123, 34, -93, 47, -21,
+        -92, 17, 49, -121, 92, 7, -126, -125, 124, -74, 3, -59, 18, -91, 3, -9, 9, 56, 116, 7, -29, 33,
+        87, -21, -128, -13, 57, 74, 9, -29, -61, -97, -21, -95, -12, -114, 16, 82, 125, -7, 10, -24, 9,
+        77, -128, -102, -25, 3, -126, 10, 13, -18, 51, 26, 127, -79, 35, 51, 12, -50, -24, 1, -7, 22,
+        81, 65, 120, -30, -38, 85, 122, -4, -106, -11, 27, 53, 41, 8, -104, -66, -38, -124, 10, 12, 76,
+        117, -109, 9, 11, 2, -18, 3, 113, -16, -79, -39, -123, -20, -128, 2, 13, -33, -58, 10, 84, -104,
+        13, 64, 109, 1, 54, -12, 28, 24, 63, -126, 118, -82, 46, -12, -15, 14, -43, 60, 22, -32, -19,
+        -46, 91, -107, 24, -94, 26, -47, 125, 6, 58, -15, -75, -26, -38, -35, 103, -16, -17, -13, 63,
+        -2, 45, -45, -73, -23, 70, -87, 51, -17, 53, 76, 14, -18, -31, -14, 103, 8, 21, -28, -33, -20,
+        -47, 6, 39, 40, -30, 7, -76, 55, 31, -20, -21, -59, 1, 25, -11, 17, 5, -13, -39, 0, -76, 50,
+        -33, -29, -50, -16, -11, -12, -1, -46, 40, -10, 65, -19, 21, -41, -32, -83, -19, -4, 49, -60,
+        118, -24, -46, 9, 102, -20, 8, -19, 25, 31, -3, -37, 0, 25, 7, 29, 2, -39, 127, -64, -20, 64,
+        115, -30, 36, 100, 35, 122, 127, 127, -127, 127, -127, 19, 127, -89, -79, -32, 39, -127, 125,
+        -80, 126, -127, 26, 8, 98, -8, -57, -90, -50, 126, 61, 127, -126, 40, -106, -68, 104, -125,
+        -119, 11, 10, -127, 66, -56, -12, -126, -104, 27, 75, 38, -124, -126, -125, 84, -123, -45, -114,
+        -128, 127, 103, -101, -124, 127, -11, -23, -123, 92, -123, 24, 126, 41, -2, -39, -27, -94, 40,
+        -112, -48, 127, 58, 14, 38, -75, -64, 73, 117, 100, -119, -11, 6, 32, -126, -14, 35, 121, -10,
+        54, -60, 89, -3, 69, -25, -20, 43, -86, -34, 24, 27, 7, -81, -99, -23, -16, -26, 13, 35, -97,
+        80, -29, -13, -121, -12, -65, -94, 70, -89, -126, -95, 88, 33, 96, 29, -90, 69, 114, -78, 65,
+        90, -47, -47, 89, 1, -12, 3, 8, 30, 5, 2, -30, -1, 6, -7, 10, -4, 46, -27, -40, 22, -6, -17, 45,
+        24, -9, 23, -14, -63, -26, -12, -57, 27, 25, 55, -76, -47, 21, 34, 33, 26, 17, 14, 6, 9, 26, 25,
+        -25, -25, -18
+    };
+
+    /** FC1 bias (24). */
+    static final byte[] INPUT_DENSE_BIAS = {
+        38, -6, 127, 127, 127, -43, -127, 78, 127, 5, 127, 123, 127, 127, -128, -76, -126, 28, 127, 125,
+        -30, 127, -89, -20
+    };
+
+    /** GRU1 input weights, [input][gate][output] (24 x 3 x 24). */
+    static final byte[] HIDDEN_GRU_WEIGHTS = {
+        -124, 23, -123, -33, -95, -4, 8, -84, 4, 101, -119, 116, -4, 123, 103, -51, 29, -124, -114, -49,
+        31, 9, 75, -128, 0, -49, 37, -50, 46, -21, -63, -104, 54, 82, 33, 21, 70, 127, -9, -79, -39,
+        -23, -127, 107, 122, -96, -46, -18, -39, 13, -28, -48, 14, 56, -52, 49, -1, -121, 25, -18, -36,
+        -52, -57, -30, 54, -124, -26, -47, 10, 39, 12, 2, 9, -127, -128, 102, 21, 11, -64, -71, 89,
+        -113, -111, 54, 31, 94, 121, -40, 30, 40, -109, 73, -9, 108, -92, 2, -127, 116, 127, 127, -122,
+        95, 127, -37, -127, 28, 89, 10, 24, -104, -62, -67, -14, 38, 14, -71, 22, -41, 20, -50, 39, 63,
+        86, 127, -18, 79, 4, -51, 2, 33, 117, -113, -78, 56, -91, 37, 34, -45, -44, -22, 21, -16, 56,
+        30, -84, -79, 38, -74, 127, 9, -25, 2, 82, 61, 25, -26, 26, 11, 117, -65, 12, -58, 42, -62, -93,
+        11, 11, 124, -123, 80, -125, 11, -90, 42, 94, 4, -109, -1, 85, -52, 45, -26, -27, 77, -5, 30,
+        90, 0, 95, -7, 53, 29, -82, 22, -9, 74, 2, -12, -73, 114, 97, -64, 122, -77, 43, 91, 86, 126,
+        106, 72, 90, -43, 46, 96, -51, 21, 22, 68, 22, 41, 79, 75, -46, -105, 23, -116, 127, -123, 102,
+        57, 85, 10, -29, 34, 125, 126, 124, 81, -15, 54, 96, -128, 39, -124, 103, 74, 126, 127, -50,
+        -71, -122, -64, 93, -75, 71, 105, 122, 123, 126, 122, -127, 33, -63, -74, 124, -71, 33, 41, -56,
+        19, 6, 65, 41, 90, -116, -3, -46, 75, -13, 98, -74, -42, 74, -95, -96, 81, 24, 32, -19, -123,
+        74, 55, 109, 115, 0, 32, 33, 12, -20, 9, 127, 127, -61, 79, -48, -54, -49, 101, -9, 27, -106,
+        74, 119, 77, 87, -126, -24, 127, 124, 31, 34, 127, 40, 3, -90, 127, 23, 57, -53, 127, -69, -88,
+        -33, 127, 19, -46, -9, -125, 13, -126, -113, 127, -41, 46, 106, -62, 3, -10, 111, 49, -34, -24,
+        -20, -112, 11, 101, -50, -34, 50, 65, -64, -106, 70, -48, 60, 9, -122, -45, 15, -112, -26, -4,
+        1, 39, 23, 58, -45, -80, 127, 82, 58, 30, -94, -119, 51, -89, 95, -107, 30, 127, 125, 58, -52,
+        -42, -38, -20, -122, 115, 39, -26, 5, 73, 13, -39, 43, -23, -20, -125, 23, 35, 53, -61, -66, 72,
+        -20, 33, 8, 35, 4, 7, 18, 19, 16, -45, -50, -71, 31, -29, -41, -27, 10, 14, 27, 9, -23, 98, 6,
+        -94, 92, 127, -114, 59, -26, -100, -62, -127, -17, -85, -60, 126, -42, -6, 33, -120, -26, -126,
+        -127, -35, -114, -31, 25, -126, -100, -126, -64, -46, -31, 30, 25, -74, -111, -97, -81, -104,
+        -114, -19, -9, -116, -69, 22, 30, 59, 8, -51, 16, -97, 18, -4, -89, 80, -50, 3, 36, -67, 56, 69,
+        -26, 107, -10, 58, -28, -4, -57, -72, -111, 0, -75, -119, 14, -75, -49, -66, -49, 8, -121, 22,
+        -54, 121, 30, 54, -26, -126, -123, 56, 5, 48, 21, -127, -11, 23, 25, -82, 6, -25, 119, 78, 4,
+        -104, 27, 61, -48, 37, -13, -52, 50, -50, 44, -1, -22, -43, -59, -78, -67, -32, -26, 9, -3, 40,
+        16, 19, 3, -9, 20, -6, -37, 28, 39, 17, -19, -10, 1, 6, -59, 74, 47, 3, -119, 0, -128, -107,
+        -25, -22, -69, -23, -111, -42, -93, -120, 90, -85, -54, -118, 76, -79, 124, 101, -77, -75, -17,
+        -71, -114, 68, 55, 79, -1, -123, -20, 127, -65, -123, -128, -87, 123, 9, -115, -14, 7, -4, 127,
+        -79, -115, 125, -28, 89, -83, 49, 89, 119, -69, -5, 12, -49, 60, 57, -24, -99, -110, 76, -83,
+        125, 73, 81, 11, 8, -45, 1, 83, 13, -70, -2, 97, 112, -97, 53, -9, -94, 124, 44, -49, -24, 52,
+        76, -110, -70, -114, -12, 72, -4, -114, 43, -43, 81, 102, -84, -27, 62, -40, 52, 58, 124, -35,
+        -51, -123, -43, 56, -75, -34, -35, -106, 93, -43, 14, -16, 46, 62, -97, 21, 30, -53, 21, -11,
+        -33, -20, -95, 4, -126, 12, 45, 20, 108, 85, 11, 20, -40, 99, 4, -25, -18, -23, -12, -126, -55,
+        -20, -44, -51, 91, -127, 127, -44, 7, 127, 78, 38, 125, -6, -94, -103, 73, 126, -126, 18, 59,
+        -46, 106, 76, 116, -31, 75, -4, 92, 102, 32, -31, 73, 42, -21, -28, 57, 127, -8, -107, 115, 124,
+        -94, -4, -128, 29, -57, 70, -82, 50, -13, -44, 38, 67, -93, 6, -39, -46, 56, 68, 27, 61, 26, 18,
+        -72, 127, 22, 18, -31, 127, 61, -65, -38, 1, -67, -1, 8, -73, 46, -116, -94, 58, -49, 71, -40,
+        -63, -82, -20, -60, 93, 76, 69, -106, 34, -31, 4, -25, 107, -18, 45, 4, -61, 126, 54, -126,
+        -125, 41, 19, 44, 32, -98, 125, -24, 125, -96, -125, 15, 87, -4, -90, 18, -40, 28, -69, 67, 22,
+        41, 39, 7, -48, -44, 12, 69, -13, 2, 44, -38, 111, -7, -126, -22, -9, 74, -128, -36, -7, -123,
+        -15, -79, -91, -37, -127, -122, 104, 30, 7, 98, -37, 111, -116, -47, 127, -45, 118, -111, -123,
+        -120, -77, -64, -125, 124, 77, 111, 77, 18, -113, 117, -9, 67, -77, 126, 49, -20, -124, 39, 41,
+        -124, -34, 114, -87, -126, 98, -20, 59, -17, -24, 125, 107, 54, 35, 33, -44, 12, -29, 125, -71,
+        -28, -63, -114, 28, -17, 121, -36, 127, 89, -122, -49, -18, -48, 17, 24, 19, -64, -128, 13, 86,
+        45, 13, -49, 55, 84, 48, 80, -39, 99, -127, 70, -33, 30, 50, 126, -65, -117, -13, -20, -24, 127,
+        115, -72, -104, 63, 126, -42, 57, 17, 46, 21, 119, 110, -100, -60, -112, 62, -33, 28, 26, -22,
+        -60, -33, -54, 78, 25, 32, -114, 86, 44, 26, 43, 76, 121, 19, 97, -2, -3, -73, -68, 6, -116, 6,
+        -43, -97, 46, -128, -120, -31, -119, -29, 16, 16, -126, -128, -126, -46, -9, -3, 92, -31, -76,
+        -126, -3, -107, -12, -23, -69, 5, 51, 27, -42, 23, -70, -128, -29, 22, 29, -126, -55, 50, -71,
+        -3, 127, 44, -27, -70, -63, -66, -70, 104, 86, 115, 29, -92, 41, -90, 44, -11, -28, 20, -11,
+        -63, -16, 43, 31, 17, -73, -31, -1, -17, -11, -39, 56, 18, 124, 72, -14, 28, 69, -121, -125, 34,
+        127, 63, 86, -80, -126, -125, -124, -47, 124, 77, 124, -19, 23, -7, -50, 96, -128, -93, 102,
+        -53, -36, -87, 119, -125, 92, -126, 118, 102, 72, -2, 125, 10, 97, 124, -125, 125, 71, -20, -47,
+        -116, -121, -4, -9, -32, 79, -124, -36, 33, -128, -74, 125, 23, 127, -29, -115, -32, 124, -89,
+        32, -107, 43, -17, 24, 24, 18, 29, -13, -15, -36, 62, -91, 4, -41, 95, 28, -23, 6, 46, 84, 66,
+        77, 68, -70, -1, -23, -6, 65, 70, -21, 9, 77, -12, 2, -118, 4, 9, -108, 84, 52, 2, 52, 13, -10,
+        58, -110, 18, 66, -95, -23, 70, 31, -3, 56, 56, -3, -7, 1, -27, -48, -61, 41, -4, 10, -62, 32,
+        -7, -24, 9, -48, -60, -4, 79, -20, -38, -76, 68, -49, -97, 0, -15, 5, -100, -49, -95, -99, -115,
+        -9, -40, 10, 104, 13, 56, 127, -27, -109, -94, -118, -102, -44, -85, 52, 127, -4, 14, 62, 121,
+        -122, -26, -79, -42, -34, 1, 25, -38, -79, -58, -31, -31, -90, -30, -123, 32, -56, 125, 66, 124,
+        -1, 3, 91, -103, -7, 23, 78, -18, 9, 69, -69, 76, -38, -33, -2, -98, 18, 106, 84, 55, 87, -47,
+        35, -124, 64, 41, -14, 46, 25, -2, 120, -21, 82, 19, -79, -37, -3, -8, -16, 21, 19, -5, -28,
+        -112, 39, -6, -30, 53, -69, 53, 46, 127, 123, 78, 20, 28, -7, 73, 72, 17, -40, 41, 111, 57, 32,
+        -95, 29, 28, -39, -65, 54, -20, -63, 29, -67, 3, 44, -57, -47, 11, 61, -22, -44, 61, 48, -100,
+        20, 125, 96, -24, -16, 3, -69, -126, 74, -125, 9, 45, -67, -123, -59, -72, 118, 69, 45, 50, -57,
+        67, 13, -66, -106, 47, 62, 22, -1, -22, -25, -40, -125, 3, 125, 32, 102, -56, -25, -75, -30,
+        122, 60, -13, 36, -73, 7, -84, 124, 40, -118, 17, -87, -118, -8, 3, -27, 111, -40, 40, -51, 127,
+        125, -45, -30, -54, 46, 80, -1, -30, 101, -17, 18, 26, 54, 7, -12, 1, -127, 123, -122, -27, -75,
+        64, 10, 25, -15, -44, 127, -127, 5, -84, -81, -7, 19, -26, 126, 15, 116, -126, 14, -76, 44, 62,
+        -110, -124, 125, -29, -87, -3, -69, 82, 90, 57, -123, 123, 100, -19, -51, -32, 69, 37, -57,
+        -128, -124, -72, -13, 51, -7, -45, -73, 5, 99, -26, -117, -96, -109, 4, -31, -12, 0, 31, -42,
+        -27, 12, -81, 118, 39, 83, 14, 41, -126, 107, -82, 94, -116, -122, -47, -109, -84, -128, -35,
+        -56, 66, 8, -65, 19, 42, -46, -72, -109, 41, 43, -127, -113, 58, 127, 42, -75, -1, 65, 117, -55,
+        -113, -123, 124, 43, -96, -115, -19, 68, 15, 94, 3, 75, 0, 34, 9, 42, 110, -48, 92, -76, 99,
+        -17, 27, 32, 13, 125, 50, -17, 56, 4, 53, 34, -8, 99, 80, -126, -21, -65, -11, -46, 44, -81, -3,
+        -121, 123, 66, -81, -84, 119, 127, 84, 105, 45, -66, -42, -23, 32, -25, 12, 111, 127, 88, 125,
+        30, 24, -127, -9, -54, 127, -116, -119, 88, 70, 94, -120, 35, -93, 15, 22, -21, 25, -110, -123,
+        -45, 8, -109, 125, -122, -86, -126, 8, -14, -120, -45, -45, 69, -125, -122, 6, 81, 86, 125, 95,
+        54, 77, 54, -123, 126, -85, -117, 56, 11, 0, -61, -91, -12, -2, -113, -3, -15, -122, -63, -91,
+        10, 84, -111, 125, 93, 21, 62, -78, -116, 13, -57, 28, -124, 126, 110, 12, 15, 95, 15, -19,
+        -125, -97, 52, -7, 101, 9, 20, -125, -26, -56, 72, 77, 12, -126, 22, -29, 47, 62, 95, 112, 69,
+        32, 97, -83, -8, -5, 67, -63, -123, 79, 59, 0, -6, -17, 4, -111, -52, 27, 65, 0
+    };
+
+    /** GRU1 recurrent weights, same layout (24 x 3 x 24). */
+    static final byte[] HIDDEN_GRU_RECURRENT_WEIGHTS = {
+        65, 83, 35, 56, 24, -34, -28, -2, 125, 19, 42, -9, 124, -53, 24, -87, 11, 35, -81, -35, -125,
+        -31, 123, -21, 33, -91, 113, -93, 45, -6, 53, 38, -92, 8, -27, 87, 4, 43, 43, 10, -128, -128,
+        -46, 127, -38, -45, 25, -87, 19, 5, 52, -96, -23, -29, 121, -126, -24, -20, -2, 69, -50, 6, 71,
+        -81, -125, 90, -94, 1, -38, 36, 89, 17, -60, 71, -48, 18, -15, 44, -18, 59, 11, 114, -51, 32,
+        110, 1, 4, 109, -24, 127, 27, 60, 88, 24, 45, -59, 75, -36, 8, 57, -32, -25, 13, 126, -89, -61,
+        -76, 127, 18, -62, -68, 23, -113, 5, 126, 43, -88, 26, -78, 18, 75, 21, 9, -74, 20, 41, 126,
+        -118, -15, 9, 116, 126, -127, 34, -6, 126, -128, -53, -54, -55, -121, 70, 127, -12, -68, 82,
+        -25, 104, -126, 126, -21, -26, 124, -75, -127, -120, 13, 61, -64, -108, -63, -65, -44, -35, -61,
+        -39, 109, -74, 113, -3, 108, -30, 125, 120, 39, 125, -128, -95, -99, 111, 9, 25, 114, -75, -92,
+        -54, -12, -32, -38, 10, 31, 10, 63, 51, 40, -99, 74, 4, 50, -128, -36, -35, -11, -28, -126, -7,
+        66, -58, -126, -22, -83, -61, -127, 49, 126, -8, 7, 62, 36, -11, -32, -44, 63, 116, 41, 65,
+        -127, 126, 63, -30, -96, 74, -92, 127, 38, -18, -128, 68, -5, 101, -4, 85, 58, 79, 0, -58, 8,
+        119, -70, -1, -79, -68, 114, -28, -90, -6, -112, 2, 127, -8, 10, 55, -59, -126, 127, 125, 80,
+        72, 35, -54, 95, -124, -124, 79, 23, -46, -61, -127, -100, 99, -77, 8, -87, 5, -2, 49, 85, 7,
+        -71, 82, 53, -41, 22, -22, -93, -103, 6, 52, -56, 14, -8, -111, 85, 16, 54, 32, -118, -24, 61,
+        -53, 96, -70, -5, -17, -67, -84, -7, -82, -107, -96, 21, -83, -58, 50, 12, -126, -1, -28, 34,
+        -126, 115, 17, 91, 1, -127, 72, 11, 126, -81, 6, 96, -8, 77, 15, -6, 63, -27, 20, -123, -109,
+        85, -79, -17, 126, -92, 2, -61, 20, 14, 17, 121, 123, 30, 57, 120, 127, 57, 42, 117, 98, 67, 39,
+        -20, -70, 100, 7, 125, 122, 40, 16, -79, 125, 83, 41, -106, -57, 24, 55, 27, -66, -111, -44, -7,
+        -43, -66, 121, 42, -128, -45, 35, 15, -127, 34, -35, -34, -40, -18, -6, 63, 111, 31, 116, 127,
+        19, 24, -71, -39, 34, 11, 19, -40, 27, 12, 106, -10, 56, -82, -106, -2, -50, -52, 114, -126,
+        -34, -43, -68, 10, 76, 57, -118, -128, 37, -104, 76, 125, 3, -76, 127, -29, 84, -94, -15, 55,
+        125, 79, 127, -57, -125, 104, -68, 126, 126, -77, 51, 45, 33, -109, 115, -11, 1, 95, -121, -5,
+        -9, -126, -114, 39, 68, -126, -107, -51, -42, 24, -8, 51, -27, -43, 66, -45, 62, -98, -109, 69,
+        67, 0, -125, -128, 49, 31, 126, -122, 2, -55, -67, -126, -70, -128, -125, -77, 25, 16, -8, -102,
+        11, -75, 82, 38, -5, 5, 19, 34, 47, -127, -93, 21, 24, -97, -18, 31, 39, 34, -20, 22, 123, 7,
+        -77, -81, -46, -9, 1, 23, 39, -127, -43, -8, -50, 10, -21, 59, -9, -4, -13, -27, 44, 127, 52,
+        -47, 70, -43, 52, 101, -49, 27, 45, 49, 33, -125, 55, 114, 20, -1, 76, -24, -96, 105, 24, 126,
+        75, -21, -105, 13, -42, 40, 126, -30, -39, -95, 125, -63, 11, 6, 125, 125, -14, 5, 42, -61, -4,
+        49, 88, 6, -107, -28, 19, -29, 47, 126, 6, -46, -89, -18, 91, -20, -6, 118, -21, -22, 39, 115,
+        11, -42, 54, 73, -55, -77, 62, -27, -59, -99, -12, -127, -40, 56, -3, -124, -91, 71, -111, 6,
+        -19, 82, -24, -35, 102, -42, 7, -126, -126, -125, 18, 98, -52, 127, 105, -52, 40, -83, 126,
+        -122, 109, 5, 127, 48, 6, 5, -125, 100, -16, 29, 85, -89, 8, 4, 41, 62, -127, 62, 122, 85, 122,
+        -107, 8, -125, 93, -127, 127, 102, 19, 19, -66, 41, -42, 114, 127, -48, -117, -29, -6, -73,
+        -102, -3, -19, 0, 88, 42, 87, -117, -20, 2, 122, 28, 63, 71, 66, 120, 93, 124, -43, 49, 103, 31,
+        90, -91, -22, -126, 26, -24, -21, 51, -126, 87, -103, -69, -10, -66, -23, 20, 97, 36, 25, -127,
+        30, -20, -63, 30, 51, -116, 23, 40, -39, 36, -83, -77, -25, -50, 110, 14, 13, -109, 125, -65,
+        -55, -87, 124, -126, -32, -72, -108, 127, 127, -125, -124, 61, 121, 102, -128, -127, 16, 100,
+        127, -124, -68, 72, -93, -128, 43, -93, -19, -125, -97, -113, -33, 83, 127, -44, 127, -75, 127,
+        16, 44, 50, -122, 23, 118, 46, 19, 26, -128, 10, 4, 99, -14, -82, -13, 30, 125, 57, 65, 60, -71,
+        35, 98, 28, 7, 1, 43, 89, 70, 75, 121, -59, 82, -126, -53, -16, -116, -65, 52, -52, 0, 80, 35,
+        45, -61, 46, 8, 107, 27, -26, -118, 90, 57, -10, 7, -15, 0, -39, -4, 12, 29, -1, 116, 84, 79,
+        119, 125, -59, 28, -6, -25, -43, 2, 90, 79, 67, 103, -82, 2, -6, 125, 19, 73, 0, -105, 112, -17,
+        104, 107, 124, 106, 19, 56, -44, 55, -112, 6, -39, -83, 126, -93, -98, 57, -120, -23, -38, 2,
+        -31, -48, 106, 127, 127, 69, 16, 110, 71, 104, 62, -12, -22, 42, -37, -94, 34, -1, -32, -12,
+        -124, -47, -13, 60, -75, -66, 58, -127, -2, 64, 76, -106, 73, -49, -31, 127, 126, 31, 16, 127,
+        -110, 107, -16, -53, 20, 69, -14, -125, 59, -44, 15, 120, 125, 125, 43, 6, 19, -58, 127, 127,
+        43, 16, 82, 97, -127, 127, -93, -41, 88, 0, 77, -15, 116, 16, -124, -31, -3, 95, -40, -126, -54,
+        -126, -83, -8, -59, 6, 67, -29, 4, 124, -10, 112, -28, -8, 85, -21, 45, 84, 6, -8, 11, 72, 32,
+        84, -62, 77, 2, -36, 75, 31, -50, 116, 126, 119, -88, -55, -14, -37, 126, 40, -108, -6, -6, 57,
+        64, -28, -76, 30, -117, -93, 31, -92, -44, -64, 94, 58, 65, 114, 41, 47, 71, 42, -26, 99, -126,
+        57, -5, 74, -19, -113, -1, 67, -21, 126, 1, -3, 33, 60, -82, 37, -48, 89, 114, -38, 127, -114,
+        35, 58, -5, 21, -46, 121, -123, -43, 127, 115, 123, 122, -101, 126, 127, 81, 52, 89, -127, 102,
+        42, 117, -9, -2, 125, 127, 110, 96, 120, 66, 70, 124, 55, 84, -38, -58, 119, -127, -16, -79,
+        123, 18, -127, -50, -38, 120, -85, 1, 7, -56, 108, -77, -2, 21, 37, 1, 13, -105, -69, 28, -87,
+        33, -104, -51, 126, 41, 3, -121, 28, 71, 58, 86, -8, 127, 94, -55, 125, 40, -19, 127, -33, -87,
+        -23, 7, -111, -68, 9, 84, -119, 55, -82, 78, -37, -20, -9, -23, 53, -13, 15, -46, 116, 126,
+        -127, 56, -126, 125, -7, -1, 45, 26, 125, 121, 29, 47, -86, 30, 10, 76, -125, -7, 23, 92, -12,
+        -39, -18, 92, -97, -8, -85, -41, 49, -50, 123, -37, -126, -30, 14, 79, -49, -65, 9, -36, -38,
+        -96, 85, -24, -13, 37, -25, -5, -64, -127, 55, -60, -18, -61, -63, 127, 56, 67, 15, 124, 72,
+        120, 127, 40, -10, 114, 24, -23, 46, 78, -53, 125, 86, 124, 86, 0, 38, 93, 21, 127, 123, 75,
+        -72, 13, 48, 33, 83, -51, 15, -32, -49, -33, 120, 64, 7, 9, 65, 60, 21, -21, -61, -53, -113, 84,
+        -97, 101, 37, -114, -27, 41, 73, 126, -10, 59, 61, -15, 70, -13, 82, -4, 69, 56, 94, -91, -50,
+        92, -74, -48, 53, -7, -107, 127, 28, 30, -26, -21, -61, 77, 82, 64, -91, -125, 122, -104, 127,
+        123, 122, 123, 76, -126, 127, -6, -80, 7, 40, -66, -65, 54, -2, 23, 96, -64, 74, 2, -53, -12,
+        -123, 39, 60, -20, 16, -17, -97, 23, -4, -53, -122, 32, -16, -54, -95, 43, 71, -1, -67, -33, 41,
+        18, 72, 28, -83, 31, -100, -91, -27, 10, -128, -106, 2, 76, -13, 42, 34, 112, -19, 44, 40, -9,
+        -11, 65, 92, -43, -125, 2, 47, -32, 25, 122, -29, 12, 101, -8, -126, -23, 43, 7, 125, -20, -124,
+        82, -2, 13, -73, -106, 115, 31, 116, -23, -44, -71, 84, 3, 47, 91, 127, 127, -15, 95, 7, 93, 5,
+        113, -50, 54, 11, 13, -127, 17, 72, 43, -23, 5, -70, 20, 15, -27, 99, 69, -109, -122, -94, 16,
+        127, 0, 116, 104, 45, 108, -34, 87, 72, -14, 118, 46, 42, 109, -26, 95, 93, 127, 60, 127, -93,
+        -54, -122, 34, -105, 56, 55, 103, 125, -71, -50, 95, -72, 127, 107, 21, 73, 126, 61, 127, 127,
+        24, -62, 90, 73, 90, -46, -78, -124, 72, 123, -42, 50, -107, 17, -32, -62, -89, 124, 1, 80, -2,
+        117, 119, -65, -127, -95, -121, -52, 103, 66, 75, -3, -62, -127, 127, -74, 124, 79, 49, 40, 105,
+        -67, -71, -70, 43, 127, 119, -4, 66, 43, 23, 91, -126, 15, 63, -119, 112, 103, 15, -99, 31,
+        -127, 69, 116, -46, -67, 2, -126, -29, 30, 30, -69, -98, -47, -87, -70, -127, 23, -73, 30, -7,
+        94, -52, -65, 98, -45, 97, 53, 23, -9, -22, -52, -47, 6, -1, -85, -15, -61, -14, 68, 110, -10,
+        -121, -25, -35, -15, -94, -123, 27, 75, 48, -66, -56, -44, 93, 109, 67, -36, 24, 70, -126, 8,
+        -127, 126, 52, 11, -32, 120, -13, -26, -28, -125, 127, 106, -50, 124, 36, -126, -12, 0, -23, 76,
+        -71, -126, -12, -17, -82, 12, 124, 57, 33, 4, 77, -46, 71, -34, 72, 125, -128, 124, -24, -128,
+        75, -120, 69, -45, 55, 33, 127, -33, 4, -105, -41, -59, -91, 123, 44, -127, 127, -67, 52, 25,
+        -125, -65, 100, -25, 123, 6, 11, -123, -92, -33, 126, -17, -4, 29, 33, 127, 96, 3, 87, -48, -18,
+        -70, 123, 58, -127, -3, -52, -1, -36, -41, 127, 51, -52, -27, 46, -83, 57, 9, 126, 127, 94, 79,
+        -37, -127, -40, 67, 52, 82, -66, 122, -13, -73, 127, -8, -80, 46, -48, 4, -54
+    };
+
+    /** GRU1 bias, [gate][output] (3 x 24). */
+    static final byte[] HIDDEN_GRU_BIAS = {
+        124, 125, -57, -126, 53, 123, 127, -75, 68, 102, -2, 116, 124, 127, 124, 125, 126, 123, -16, 48,
+        125, 126, 78, 85, 11, 126, -30, -30, -64, -3, -105, -29, -17, 69, 63, 2, -32, -10, -62, 113,
+        -52, 112, -109, 112, 7, -40, 73, 53, 62, 6, -2, 0, 0, 100, -16, 26, -24, 56, 26, -10, -33, 41,
+        70, 109, -29, 127, 34, -66, 49, 53, 27, 62
+    };
+
+    /** FC2 weights (24 x 1). */
+    static final byte[] OUTPUT_DENSE_WEIGHTS = {
+        127, 127, 127, 127, 127, 20, 127, -126, -126, -54, 14, 125, -126, -126, 127, -125, -126, 127,
+        -127, -127, -57, -30, 127, 80
+    };
+
+    /** FC2 bias (1). */
+    static final byte[] OUTPUT_DENSE_BIAS = {
+        -50
+    };
+
+    private RnnVadWeights() {
+    }
+}

ts3-client/core/src/main/java/com/ts3client/audio/vad/SpectralFeatures.java

@@ -0,0 +1,281 @@
+package com.ts3client.audio.vad;
+
+import static com.ts3client.audio.vad.VadConstants.CEPSTRAL_HISTORY;
+import static com.ts3client.audio.vad.VadConstants.FRAME_20MS_24K;
+import static com.ts3client.audio.vad.VadConstants.NUM_BANDS;
+import static com.ts3client.audio.vad.VadConstants.NUM_LOWER_BANDS;
+import static com.ts3client.audio.vad.VadConstants.OPUS_BANDS_24K;
+
+/**
+ * Band-wise spectral features for {@code rnn_vad}, ported from WebRTC's
+ * {@code rnn_vad/spectral_features.cc} and {@code spectral_features_internal.cc}.
+ *
+ * <p>A 20&nbsp;ms Vorbis-windowed FFT is folded into 22 Opus-scale bands, log-compressed
+ * and DCT'd into a cepstrum. The network is fed the higher cepstral coefficients, the
+ * running average and first two derivatives of the lower ones, the cepstrum of the
+ * band-wise correlation between the current frame and the frame one pitch period earlier,
+ * and a measure of how much the cepstrum has been varying.
+ */
+final class SpectralFeatures {
+
+    /** Total band energy below which the frame is treated as silence. */
+    private static final float SILENCE_THRESHOLD = 0.04f;
+
+    /** FFT bins per Opus band at 24 kHz for a 20 ms frame. */
+    private static final int[] OPUS_BAND_SIZES =
+            {4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 16, 16, 16, 24, 24, 32, 48};
+
+    /** sqrt(2 / NUM_BANDS), applied after the DCT. */
+    private static final float DCT_SCALING_FACTOR = 0.301511345f;
+
+    private final RealFft fft = new RealFft(FRAME_20MS_24K);
+    private final float[] halfWindow = new float[FRAME_20MS_24K / 2];
+    private final float[] bandWeights = new float[FRAME_20MS_24K / 2];
+    private final float[] dctTable = new float[NUM_BANDS * NUM_BANDS];
+
+    private final float[] windowed = new float[FRAME_20MS_24K];
+    private final float[] referenceFft = new float[FRAME_20MS_24K];
+    private final float[] laggedFft = new float[FRAME_20MS_24K];
+    private final float[] referenceBandsEnergy = new float[OPUS_BANDS_24K];
+    private final float[] laggedBandsEnergy = new float[OPUS_BANDS_24K];
+    private final float[] bandsCrossCorr = new float[OPUS_BANDS_24K];
+    private final float[] logBandsEnergy = new float[NUM_BANDS];
+    private final float[] cepstrum = new float[NUM_BANDS];
+    private final float[] crossCorrCepstrum = new float[NUM_LOWER_BANDS];
+
+    /** Ring buffer of the last {@link VadConstants#CEPSTRAL_HISTORY} cepstra. */
+    private final float[][] cepstralHistory = new float[CEPSTRAL_HISTORY][NUM_BANDS];
+    private int cepstralTail;
+
+    /**
+     * Upper-right triangle of pairwise cepstral distances, stored as a square matrix so a
+     * new frame can be shifted in with a single array copy.
+     */
+    private final float[] cepstralDiffs = new float[(CEPSTRAL_HISTORY - 1) * (CEPSTRAL_HISTORY - 1)];
+    private final float[] newDistances = new float[CEPSTRAL_HISTORY - 1];
+
+    SpectralFeatures() {
+        int halfSize = FRAME_20MS_24K / 2;
+        float scaling = 1.0f / FRAME_20MS_24K;
+        for (int i = 0; i < halfSize; i++) {
+            double inner = Math.sin(0.5 * Math.PI * (i + 0.5) / halfSize);
+            halfWindow[i] = (float) (scaling * Math.sin(0.5 * Math.PI * inner * inner));
+        }
+        // Each band overlaps its neighbour with a triangular response; the weight is the
+        // fractional position of the bin within its band.
+        int bin = 0;
+        for (int bandSize : OPUS_BAND_SIZES) {
+            for (int j = 0; j < bandSize; j++) {
+                bandWeights[bin++] = (float) j / bandSize;
+            }
+        }
+        double k = Math.sqrt(0.5);
+        for (int i = 0; i < NUM_BANDS; i++) {
+            for (int j = 0; j < NUM_BANDS; j++) {
+                dctTable[i * NUM_BANDS + j] = (float) Math.cos((i + 0.5) * j * Math.PI / NUM_BANDS);
+            }
+            dctTable[i * NUM_BANDS] *= (float) k;
+        }
+    }
+
+    void reset() {
+        for (float[] row : cepstralHistory) {
+            java.util.Arrays.fill(row, 0.0f);
+        }
+        cepstralTail = 0;
+        java.util.Arrays.fill(cepstralDiffs, 0.0f);
+    }
+
+    /**
+     * Writes the spectral part of the feature vector and returns {@code true} if the
+     * reference frame is silence, in which case the vector is only partially written.
+     *
+     * @param reference       buffer holding the most recent 20 ms at 24 kHz
+     * @param referenceOffset offset of that frame within {@code reference}
+     * @param lagged          buffer holding the 20 ms one pitch period earlier
+     * @param laggedOffset    offset of that frame within {@code lagged}
+     */
+    boolean checkSilenceComputeFeatures(float[] reference, int referenceOffset,
+                                        float[] lagged, int laggedOffset,
+                                        float[] featureVector) {
+        forwardFft(reference, referenceOffset, referenceFft);
+        crossCorrelation(referenceFft, referenceFft, referenceBandsEnergy);
+
+        float totalEnergy = 0;
+        for (float e : referenceBandsEnergy) {
+            totalEnergy += e;
+        }
+        if (totalEnergy < SILENCE_THRESHOLD) {
+            return true;
+        }
+
+        forwardFft(lagged, laggedOffset, laggedFft);
+        crossCorrelation(laggedFft, laggedFft, laggedBandsEnergy);
+
+        smoothedLogMagnitudeSpectrum(referenceBandsEnergy, logBandsEnergy);
+        dct(logBandsEnergy, NUM_BANDS, cepstrum, NUM_BANDS);
+        // Ad-hoc correction terms for the first two cepstral coefficients.
+        cepstrum[0] -= 12.0f;
+        cepstrum[1] -= 4.0f;
+
+        pushCepstrum(cepstrum);
+
+        // Higher bands go in as-is; the lower ones are summarised over time instead.
+        System.arraycopy(cepstrum, NUM_LOWER_BANDS, featureVector, NUM_LOWER_BANDS,
+                NUM_BANDS - NUM_LOWER_BANDS);
+        computeAverageAndDerivatives(featureVector);
+        computeNormalizedCepstralCorrelation(featureVector);
+        featureVector[VadConstants.FEATURE_VECTOR_SIZE - 1] = computeVariability();
+        return false;
+    }
+
+    /** Windows a 20 ms frame and transforms it, zeroing the unused Nyquist coefficient. */
+    private void forwardFft(float[] frame, int offset, float[] out) {
+        int halfSize = FRAME_20MS_24K / 2;
+        for (int i = 0, j = FRAME_20MS_24K - 1; i < halfSize; i++, j--) {
+            windowed[i] = frame[offset + i] * halfWindow[i];
+            windowed[j] = frame[offset + j] * halfWindow[i];
+        }
+        fft.forward(windowed, out);
+        out[1] = 0.0f;
+    }
+
+    /**
+     * Folds the interleaved spectra into Opus bands. Each bin contributes to the band it
+     * sits in and to the next one, split by the triangular weight.
+     */
+    private void crossCorrelation(float[] x, float[] y, float[] out) {
+        int k = 0;
+        out[0] = 0.0f;
+        for (int i = 0; i < OPUS_BANDS_24K - 1; i++) {
+            out[i + 1] = 0.0f;
+            for (int j = 0; j < OPUS_BAND_SIZES[i]; j++) {
+                float v = x[2 * k] * y[2 * k] + x[2 * k + 1] * y[2 * k + 1];
+                float tmp = bandWeights[k] * v;
+                out[i] += v - tmp;
+                out[i + 1] += tmp;
+                k++;
+            }
+        }
+        out[0] *= 2.0f; // The first band only receives half a triangle.
+    }
+
+    /** Log magnitude with smoothing over frequency and a decaying floor. */
+    private static void smoothedLogMagnitudeSpectrum(float[] bandsEnergy, float[] out) {
+        final float logOneByHundred = -2.0f;
+        float logMax = logOneByHundred;
+        float follow = logOneByHundred;
+        for (int i = 0; i < out.length; i++) {
+            float x = (i < bandsEnergy.length)
+                    ? (float) Math.log10(0.01f + bandsEnergy[i])
+                    : logOneByHundred;
+            x = Math.max(logMax - 7.0f, Math.max(follow - 1.5f, x));
+            logMax = Math.max(logMax, x);
+            follow = Math.max(follow - 1.5f, x);
+            out[i] = x;
+        }
+    }
+
+    /** DCT-II of the first {@code inSize} values of {@code in}, truncated to {@code outSize}. */
+    private void dct(float[] in, int inSize, float[] out, int outSize) {
+        for (int i = 0; i < outSize; i++) {
+            float sum = 0;
+            for (int j = 0; j < inSize; j++) {
+                sum += in[j] * dctTable[j * NUM_BANDS + i];
+            }
+            out[i] = sum * DCT_SCALING_FACTOR;
+        }
+    }
+
+    private void pushCepstrum(float[] newCepstrum) {
+        // Distance from the new cepstrum to each older one, nearest first.
+        for (int i = 0; i < CEPSTRAL_HISTORY - 1; i++) {
+            float[] old = cepstralHistoryAt(i);
+            float sum = 0;
+            for (int k = 0; k < NUM_BANDS; k++) {
+                float c = newCepstrum[k] - old[k];
+                sum += c * c;
+            }
+            newDistances[i] = sum;
+        }
+        System.arraycopy(newCepstrum, 0, cepstralHistory[cepstralTail], 0, NUM_BANDS);
+        cepstralTail = (cepstralTail + 1) % CEPSTRAL_HISTORY;
+        pushCepstralDistances();
+    }
+
+    /** Returns the cepstrum pushed {@code delay} frames ago (0 = most recent). */
+    private float[] cepstralHistoryAt(int delay) {
+        int offset = cepstralTail - 1 - delay;
+        if (offset < 0) {
+            offset += CEPSTRAL_HISTORY;
+        }
+        return cepstralHistory[offset];
+    }
+
+    /** Shifts the distance matrix up-left by one and writes the new column. */
+    private void pushCepstralDistances() {
+        final int s = CEPSTRAL_HISTORY;
+        System.arraycopy(cepstralDiffs, s, cepstralDiffs, 0, cepstralDiffs.length - s);
+        for (int i = 0; i < newDistances.length; i++) {
+            cepstralDiffs[(s - 1 - i) * (s - 1) - 1] = newDistances[i];
+        }
+    }
+
+    private float cepstralDistance(int delay1, int delay2) {
+        int row = CEPSTRAL_HISTORY - 1 - delay1;
+        int col = CEPSTRAL_HISTORY - 1 - delay2;
+        if (row > col) { // Only the upper-right triangle is stored.
+            int tmp = row;
+            row = col;
+            col = tmp;
+        }
+        return cepstralDiffs[row * (CEPSTRAL_HISTORY - 1) + (col - 1)];
+    }
+
+    private void computeAverageAndDerivatives(float[] featureVector) {
+        float[] curr = cepstralHistoryAt(0);
+        float[] prev1 = cepstralHistoryAt(1);
+        float[] prev2 = cepstralHistoryAt(2);
+        for (int i = 0; i < NUM_LOWER_BANDS; i++) {
+            featureVector[i] = curr[i] + prev1[i] + prev2[i];                    // kernel [1, 1, 1]
+            featureVector[NUM_BANDS + i] = curr[i] - prev2[i];                   // kernel [1, 0, -1]
+            featureVector[NUM_BANDS + NUM_LOWER_BANDS + i] =
+                    curr[i] - 2 * prev1[i] + prev2[i];                           // kernel [1, -2, 1]
+        }
+    }
+
+    /** Band correlation between the current frame and the one a pitch period earlier. */
+    private void computeNormalizedCepstralCorrelation(float[] featureVector) {
+        crossCorrelation(referenceFft, laggedFft, bandsCrossCorr);
+        for (int i = 0; i < bandsCrossCorr.length; i++) {
+            bandsCrossCorr[i] /= (float) Math.sqrt(
+                    0.001f + referenceBandsEnergy[i] * laggedBandsEnergy[i]);
+        }
+        dct(bandsCrossCorr, OPUS_BANDS_24K, crossCorrCepstrum, NUM_LOWER_BANDS);
+        // Ad-hoc correction terms, as for the frame cepstrum.
+        crossCorrCepstrum[0] -= 1.3f;
+        crossCorrCepstrum[1] -= 0.9f;
+        System.arraycopy(crossCorrCepstrum, 0, featureVector,
+                NUM_BANDS + 2 * NUM_LOWER_BANDS, NUM_LOWER_BANDS);
+    }
+
+    /**
+     * How far the current cepstrum sits from its nearest neighbour in the recent history,
+     * averaged over the history. Steady tones score low, speech scores high.
+     */
+    private float computeVariability() {
+        float variability = 0;
+        for (int delay1 = 0; delay1 < CEPSTRAL_HISTORY; delay1++) {
+            float minDist = Float.MAX_VALUE;
+            for (int delay2 = 0; delay2 < CEPSTRAL_HISTORY; delay2++) {
+                if (delay1 == delay2) {
+                    continue; // The distance would be 0.
+                }
+                minDist = Math.min(minDist, cepstralDistance(delay1, delay2));
+            }
+            variability += minDist;
+        }
+        // Normalised against training-set statistics.
+        return variability / CEPSTRAL_HISTORY - 2.1f;
+    }
+}

ts3-client/core/src/main/java/com/ts3client/audio/vad/VadConstants.java

@@ -0,0 +1,54 @@
+package com.ts3client.audio.vad;
+
+/**
+ * Sizes and pitch-search bounds of WebRTC's {@code rnn_vad}, mirroring
+ * {@code modules/audio_processing/agc2/rnn_vad/common.h}.
+ *
+ * <p>The detector analyses 10&nbsp;ms frames at 24&nbsp;kHz. Spectral analysis uses the
+ * most recent 20&nbsp;ms; pitch search additionally needs one maximum pitch period of
+ * history, hence the 864-sample buffer.
+ */
+final class VadConstants {
+
+    static final int SAMPLE_RATE_24K = 24_000;
+    static final int FRAME_10MS_24K = SAMPLE_RATE_24K / 100;   // 240
+    static final int FRAME_20MS_24K = FRAME_10MS_24K * 2;      // 480
+
+    /** Pitch range at 24 kHz: 0.00125 s to 0.016 s. */
+    static final int MIN_PITCH_24K = SAMPLE_RATE_24K / 800;    // 30
+    static final int MAX_PITCH_24K = 384;                      // 24000 / 62.5
+    static final int BUF_SIZE_24K = MAX_PITCH_24K + FRAME_20MS_24K;  // 864
+
+    /**
+     * The coarse search skips very short periods; a refinement step recovers them, so the
+     * initial pass starts three minimum periods in.
+     */
+    static final int INITIAL_MIN_PITCH_24K = 3 * MIN_PITCH_24K;              // 90
+    static final int INITIAL_NUM_LAGS_24K = MAX_PITCH_24K - INITIAL_MIN_PITCH_24K;  // 294
+    static final int REFINE_NUM_LAGS_24K = MAX_PITCH_24K + 1;                // 385
+
+    // 12 kHz analysis, used for the coarse pitch search.
+    static final int FRAME_20MS_12K = 240;
+    static final int BUF_SIZE_12K = BUF_SIZE_24K / 2;                 // 432
+    static final int INITIAL_MIN_PITCH_12K = INITIAL_MIN_PITCH_24K / 2;  // 45
+    static final int MAX_PITCH_12K = MAX_PITCH_24K / 2;               // 192
+    static final int NUM_LAGS_12K = MAX_PITCH_12K - INITIAL_MIN_PITCH_12K;  // 147
+
+    // The pitch period fed to the network is expressed at 48 kHz.
+    static final int MIN_PITCH_48K = MIN_PITCH_24K * 2;   // 60
+    static final int MAX_PITCH_48K = MAX_PITCH_24K * 2;   // 768
+
+    // Spectral features.
+    static final int NUM_BANDS = 22;
+    static final int NUM_LOWER_BANDS = 6;
+    static final int CEPSTRAL_HISTORY = 8;
+    /** Opus bands that fall below the 24 kHz Nyquist frequency. */
+    static final int OPUS_BANDS_24K = 20;
+
+    static final int NUM_LPC_COEFFICIENTS = 5;
+
+    static final int FEATURE_VECTOR_SIZE = 42;
+
+    private VadConstants() {
+    }
+}

ts3-client/core/src/main/java/com/ts3client/config/ClientVersion.java

@@ -0,0 +1,88 @@
+package com.ts3client.config;
+
+import java.util.List;
+
+/**
+ * The version, platform and signature a client reports to the server in
+ * {@code clientinit}. Other clients see the version and platform in the info
+ * panel ("3.6.2 on Windows").
+ *
+ * <p>The signature is TeamSpeak's, over the version and platform strings
+ * together, so the three only work as a set. Servers answer "client is modified"
+ * for a version they do not accept — an invented one, or one older than their
+ * configured minimum — which is why {@link #PRESETS} holds genuine triples taken
+ * from released clients, newest first per platform.
+ *
+ * @param label    human-readable name, e.g. "3.6.2 on Windows"
+ * @param version  {@code client_version}, e.g. "3.6.2 [Build: 1695203293]"
+ * @param platform {@code client_platform}, e.g. "Windows"
+ * @param sign     {@code client_version_sign}, base64
+ */
+public record ClientVersion(String label, String version, String platform, String sign) {
+
+    /** Platform names the official clients report. */
+    public static final List<String> PLATFORMS =
+            List.of("Windows", "Linux", "OS X", "Android", "iOS");
+
+    /**
+     * Signed triples from released TeamSpeak clients. "3.?.?" is the version the
+     * SDK-based clients report; it is signed for every platform and is what this
+     * client uses by default.
+     */
+    public static final List<ClientVersion> PRESETS = List.of(
+            new ClientVersion("3.?.? on Windows", "3.?.? [Build: 5680278000]", "Windows",
+                    "DX5NIYLvfJEUjuIbCidnoeozxIDRRkpq3I9vVMBmE9L2qnekOoBzSenkzsg2lC9CMv8K5hkEzhr2TYUYSwUXCg=="),
+            new ClientVersion("3.6.3 on Windows", "3.6.3 [Build: 1701166057]", "Windows",
+                    "ML3yE6pV0QGyhc8o7k1bgqDSj+5gZIQFMjBNhWJ6L0FtJwniBq8l1wivx3DzgVVCvyRbzfg8MsdV/rjl5sHNCw=="),
+            new ClientVersion("3.6.2 on Windows", "3.6.2 [Build: 1695203293]", "Windows",
+                    "4BdaZpdgUSMCuIs8qcloJPNxNlJ4o7QKnxMCRO60mSOTtJZyKjOrGLAmeAEtLIJjcjmdSpycMbQOIV92K2vXAw=="),
+            new ClientVersion("3.6.1 on Windows", "3.6.1 [Build: 1690872913]", "Windows",
+                    "+YmPaYUBL4F9+TgxyFhlT8qIi1Ym+So4NNMcuohla/u4kfJCGabZ1vDF4cIOAghIqWfO+bQ0OkORZrCBdpi2Cw=="),
+            new ClientVersion("3.6.0 on Windows", "3.6.0 [Build: 1686749764]", "Windows",
+                    "gfzG6CfwNYeqrjT68s7ahPd24A/XS0P8LLAB7hrE54MnrlO12RiflD2w69VZ7EYlqnd9GAiVzdGJHCmCFWtlAQ=="),
+
+            new ClientVersion("3.?.? on Linux", "3.?.? [Build: 5680278000]", "Linux",
+                    "Hjd+N58Gv3ENhoKmGYy2bNRBsNNgm5kpiaQWxOj5HN2DXttG6REjymSwJtpJ8muC2gSwRuZi0R+8Laan5ts5CQ=="),
+            new ClientVersion("3.6.2 on Linux", "3.6.2 [Build: 1695203293]", "Linux",
+                    "p4iF1jZ3ZOz9MEkKSZ2bvnFtm9WmUcQy9mAP//erFE4PF1sB6K1CSANrr+3X4B0aZR0u+K2pjnv8kiKsWKQCBQ=="),
+            new ClientVersion("3.6.1 on Linux", "3.6.1 [Build: 1690193193]", "Linux",
+                    "UAcE5h5FgPcdChWTtiO816HX8f2qdoDcDEw6crbJ96Yo7rp1Bt+qx/rkKK9bzlVWMhOd4fI7pr++1XaPkEBnAQ=="),
+            new ClientVersion("3.6.0 on Linux", "3.6.0 [Build: 1686749764]", "Linux",
+                    "TccRBHwn5LSA0lfpa2B42QmfCOiG+MqqyhlOqy5RcuRQNUGPD0e47lUz+Z/8+Gsdc1TPG4+vYlRl8+v2v+26Aw=="),
+            new ClientVersion("3.5.8 on Linux", "3.5.8 [Build: 1644595825]", "Linux",
+                    "CK+cWJQESZgUdw1AFHINMbwiLjFGSiupour0Dfj/j1/xwx4L3nW3G+alYtiQw/wQwlWm873HS6PvXUBarz/tCw=="),
+
+            new ClientVersion("3.?.? on OS X", "3.?.? [Build: 5680278000]", "OS X",
+                    "SttEnjoWE8jqIM6BOHSfiZP9DGjW0EP/ajU4bdKqgGMV4aYq/kzwVA9gxbmdIzV4lbaokvXBqrRjfBHrTVh8Cg=="),
+            new ClientVersion("3.6.2 on OS X", "3.6.2 [Build: 1695203293]", "OS X",
+                    "SOCkLcsxINIGVc+3OQ5Vrmv2BVNNFA9LX5Jj9tqbIiYv2HU6Z5E8AL5+v5G2LDN0F+U55+uW43ezUoYAr1WuBA=="),
+            new ClientVersion("3.6.1 on OS X", "3.6.1 [Build: 1690193193]", "OS X",
+                    "P+KOw42V8K0nN5FbGItCaJzrDuWcRgfE3MRzrtbYAhRMTXHzRxvwLkoLM7+vKTW135NtWZlKbZuDAvxgwhSLBg=="),
+            new ClientVersion("3.6.0 on OS X", "3.6.0 [Build: 1686749764]", "OS X",
+                    "g8H7Op8eCrn0wHutuD/SlmUcZPmkSlFUBhvZpSgm9kuQl4dapzKJq2anI5jDwRs/ooBm/wrIlSiWI6HXuOPZDA=="),
+
+            new ClientVersion("3.?.? on Android", "3.?.? [Build: 5680278000]", "Android",
+                    "AWb948BY32Z7bpIyoAlQguSmxOGcmjESPceQe1DpW5IZ4+AW1KfTk2VUIYNfUPsxReDJMCtlhVKslzhR2lf0AA=="),
+            new ClientVersion("3.8.7 on Android", "3.8.7 [Build: 1785186501]", "Android",
+                    "mbt0WPhXJ+YKJUix5b6t+ZOHTCfvRqhhhrpcS5koM9CUL0BAFQZRG5Di5rJrqipZdk+gEUtpAX9I5nkuL7V9Dw=="),
+            new ClientVersion("3.8.6 on Android", "3.8.6 [Build: 1774892004]", "Android",
+                    "Hh0oEZupsq8f0BuUHhMKdkXsMmgZZ03dJL8qAwnlH2JAHuefaAZFS/buiH2MLwgdRkZ81ffYk5YOTfc/bJczDw=="),
+
+            new ClientVersion("3.?.? on iOS", "3.?.? [Build: 5680278000]", "iOS",
+                    "XrAf+Buq6Eb0ehEW/niFp06YX+nGGOS0Ke4MoUBzn+cX9q6G5C0A/d5XtgcNMe8r9jJgV/adIYVpsGS3pVlSAA=="),
+            new ClientVersion("3.8.2 on iOS", "3.8.2 [Build: 1764028963]", "iOS",
+                    "Bc57xjumaioWkouTRqoS6XbSIXysrPH+gxynXgL4/nYr38l4OocUTpQaMMHevmgk/FZxJWFNEhU3Hpg5+M+MAA=="),
+            new ClientVersion("3.8.1 on iOS", "3.8.1 [Build: 1763403218]", "iOS",
+                    "GM/7isPK6LDKTN3Hdelenbr99dnPyWTccLCOCFKK41321XMsdG02putu+NskCLddlDPu2CPYJ4YABRS2pJ88Ag=="));
+
+    /** The triple used when the user has not chosen one; matches the library's built-in. */
+    public static final ClientVersion DEFAULT = PRESETS.get(0);
+
+    /** The preset carrying exactly these three values, or null when the user typed their own. */
+    public static ClientVersion match(String version, String platform, String sign) {
+        return PRESETS.stream()
+                .filter(v -> v.version.equals(version) && v.platform.equals(platform) && v.sign.equals(sign))
+                .findFirst()
+                .orElse(null);
+    }
+}

ts3-client/core/src/main/java/com/ts3client/config/Settings.java

@@ -27,6 +27,12 @@ public final class Settings {
         CONTINUOUS
     }
 
+    /** Which look-and-feel variant the window is painted with. */
+    public enum Appearance {
+        LIGHT,
+        DARK
+    }
+
     /** Voice-activation strategy, mirroring the TS3 client's VAD modes. */
     public enum VadMode {
         /** Speech-probability detector only. */
@@ -51,6 +57,16 @@ public final class Settings {
     /** Id of the identity used when a server doesn't select one of its own. */
     public String defaultIdentityId = "";
 
+    // ---- reported client version ----
+    /** Report {@link #clientVersion}/{@link #clientPlatform} instead of the built-in ones. */
+    public boolean customVersion = false;
+    /** Version string other clients see, e.g. "3.5.6 [Build: 1603963200]". */
+    public String clientVersion = ClientVersion.DEFAULT.version();
+    /** Operating system other clients see, e.g. "Windows". */
+    public String clientPlatform = ClientVersion.DEFAULT.platform();
+    /** TeamSpeak's signature over the version and platform; servers may verify it. */
+    public String clientVersionSign = ClientVersion.DEFAULT.sign();
+
     // ---- audio devices (mixer names; empty = system default) ----
     public String inputDevice = "";
     public String outputDevice = "";
@@ -59,14 +75,18 @@ public final class Settings {
     public InputMode inputMode = InputMode.VOICE_ACTIVATION;
     /** Voice-activation strategy used when {@link #inputMode} is VOICE_ACTIVATION. */
     public VadMode vadMode = VadMode.HYBRID;
-    /** VAD threshold in dBFS (RMS). Typical range -60 (sensitive) .. -10 (loud). */
-    public double vadThresholdDb = -45.0;
-    /** Speech-probability threshold (0..1) for Automatic/Hybrid modes. */
+    /**
+     * Volume-gate threshold on {@link com.ts3client.audio.InputLevel}'s scale, the same one
+     * the TS3 client's slider uses: -50 (most sensitive) .. +50, defaulting to -40.
+     */
+    public double vadThresholdDb = -40.0;
+    /**
+     * Speech-probability threshold (0..1) for Automatic/Hybrid modes. TS3 calls this
+     * {@code vad_likelihood} and also defaults it to 0.5.
+     */
     public double speechThreshold = 0.5;
     /** Keep voice activation running while in push-to-talk mode. */
     public boolean vadOverPtt = false;
-    /** Push-to-talk key as an AWT virtual-key code; the frontend interprets it. Default: Ctrl (VK_CONTROL). */
-    public int pushToTalkKey = 17;
     /** Opus target bitrate in bits/sec. */
     public int bitrate = 48000;
     /** Opus complexity 0..10. */
@@ -81,6 +101,12 @@ public final class Settings {
     public boolean music = false;
     /** Master playback gain, 0..1 (may exceed 1 for boost up to 2). */
     public double outputVolume = 1.0;
+    /**
+     * Global multiplier on top of {@link #outputVolume} and {@link #soundVolume},
+     * controlled from the toolbar's Master Volume slider so both can be ridden
+     * with one control. 0..2, same boost headroom as the other volumes.
+     */
+    public double masterVolume = 1.0;
     /** Microphone input gain multiplier applied before VAD/encode. */
     public double inputVolume = 1.0;
     /** Remove steady background noise from the microphone (spectral denoise). */
@@ -105,6 +131,15 @@ public final class Settings {
     /** Extra folder to look for icon packs in, on top of the well-known locations. */
     public String iconPackDir = "";
 
+    /** Look-and-feel variant; see {@link Appearance}. */
+    public Appearance appearance = Appearance.LIGHT;
+
+    // ---- window chrome ----
+    /** Whether the status bar at the bottom of the window is shown. */
+    public boolean showStatusBar = true;
+    /** Whether the Master Volume slider is shown on the toolbar. */
+    public boolean showMasterVolumeSlider = true;
+
     /** Which actions make a sound, and which ones are important enough to survive muting. */
     public final NotificationSettings notifications = new NotificationSettings();
 
@@ -141,6 +176,16 @@ public final class Settings {
         return new File(identityFile);
     }
 
+    /** {@link #outputVolume} scaled by the Master Volume slider. */
+    public double effectiveOutputVolume() {
+        return outputVolume * masterVolume;
+    }
+
+    /** {@link #soundVolume} scaled by the Master Volume slider. */
+    public double effectiveSoundVolume() {
+        return soundVolume * masterVolume;
+    }
+
     /** The directory holding all persistent client state (settings, identities, caches). */
     public static File configDir() {
         return DIR;
@@ -152,14 +197,18 @@ public final class Settings {
         serverPassword = props.getProperty("serverPassword", serverPassword);
         identityFile = props.getProperty("identityFile", identityFile);
         defaultIdentityId = props.getProperty("defaultIdentityId", defaultIdentityId);
+        customVersion = parseB(props.getProperty("customVersion"), customVersion);
+        clientVersion = props.getProperty("clientVersion", clientVersion);
+        clientPlatform = props.getProperty("clientPlatform", clientPlatform);
+        clientVersionSign = props.getProperty("clientVersionSign", clientVersionSign);
         inputDevice = props.getProperty("inputDevice", inputDevice);
         outputDevice = props.getProperty("outputDevice", outputDevice);
         inputMode = parseMode(props.getProperty("inputMode"), inputMode);
         vadMode = parseVadMode(props.getProperty("vadMode"), vadMode);
-        vadThresholdDb = parseD(props.getProperty("vadThresholdDb"), vadThresholdDb);
+        vadThresholdDb = parseD(props.getProperty("vadLevelDb"),
+                migrateThreshold(props.getProperty("vadThresholdDb"), vadThresholdDb));
         speechThreshold = parseD(props.getProperty("speechThreshold"), speechThreshold);
         vadOverPtt = parseB(props.getProperty("vadOverPtt"), vadOverPtt);
-        pushToTalkKey = parseI(props.getProperty("pushToTalkKey"), pushToTalkKey);
         bitrate = parseI(props.getProperty("bitrate"), bitrate);
         complexity = parseI(props.getProperty("complexity"), complexity);
         vbr = parseB(props.getProperty("vbr"), vbr);
@@ -167,6 +216,7 @@ public final class Settings {
         packetLoss = parseI(props.getProperty("packetLoss"), packetLoss);
         music = parseB(props.getProperty("music"), music);
         outputVolume = parseD(props.getProperty("outputVolume"), outputVolume);
+        masterVolume = parseD(props.getProperty("masterVolume"), masterVolume);
         inputVolume = parseD(props.getProperty("inputVolume"), inputVolume);
         denoise = parseB(props.getProperty("denoise"), denoise);
         denoiserLevel = parseD(props.getProperty("denoiserLevel"), denoiserLevel);
@@ -177,6 +227,9 @@ public final class Settings {
         soundPackDir = props.getProperty("soundPackDir", soundPackDir);
         iconPack = props.getProperty("iconPack", iconPack);
         iconPackDir = props.getProperty("iconPackDir", iconPackDir);
+        appearance = parseAppearance(props.getProperty("appearance"), appearance);
+        showStatusBar = parseB(props.getProperty("showStatusBar"), showStatusBar);
+        showMasterVolumeSlider = parseB(props.getProperty("showMasterVolumeSlider"), showMasterVolumeSlider);
         notifications.load(props);
     }
 
@@ -186,14 +239,18 @@ public final class Settings {
         props.setProperty("serverPassword", serverPassword);
         props.setProperty("identityFile", identityFile);
         props.setProperty("defaultIdentityId", defaultIdentityId);
+        props.setProperty("customVersion", Boolean.toString(customVersion));
+        props.setProperty("clientVersion", clientVersion);
+        props.setProperty("clientPlatform", clientPlatform);
+        props.setProperty("clientVersionSign", clientVersionSign);
         props.setProperty("inputDevice", inputDevice);
         props.setProperty("outputDevice", outputDevice);
         props.setProperty("inputMode", inputMode.name());
         props.setProperty("vadMode", vadMode.name());
-        props.setProperty("vadThresholdDb", Double.toString(vadThresholdDb));
+        props.setProperty("vadLevelDb", Double.toString(vadThresholdDb));
+        props.remove("vadThresholdDb");
         props.setProperty("speechThreshold", Double.toString(speechThreshold));
         props.setProperty("vadOverPtt", Boolean.toString(vadOverPtt));
-        props.setProperty("pushToTalkKey", Integer.toString(pushToTalkKey));
         props.setProperty("bitrate", Integer.toString(bitrate));
         props.setProperty("complexity", Integer.toString(complexity));
         props.setProperty("vbr", Boolean.toString(vbr));
@@ -201,6 +258,7 @@ public final class Settings {
         props.setProperty("packetLoss", Integer.toString(packetLoss));
         props.setProperty("music", Boolean.toString(music));
         props.setProperty("outputVolume", Double.toString(outputVolume));
+        props.setProperty("masterVolume", Double.toString(masterVolume));
         props.setProperty("inputVolume", Double.toString(inputVolume));
         props.setProperty("denoise", Boolean.toString(denoise));
         props.setProperty("denoiserLevel", Double.toString(denoiserLevel));
@@ -211,6 +269,9 @@ public final class Settings {
         props.setProperty("soundPackDir", soundPackDir);
         props.setProperty("iconPack", iconPack);
         props.setProperty("iconPackDir", iconPackDir);
+        props.setProperty("appearance", appearance.name());
+        props.setProperty("showStatusBar", Boolean.toString(showStatusBar));
+        props.setProperty("showMasterVolumeSlider", Boolean.toString(showMasterVolumeSlider));
         notifications.store(props);
     }
 
@@ -223,6 +284,15 @@ public final class Settings {
         }
     }
 
+    private static Appearance parseAppearance(String v, Appearance def) {
+        if (v == null) return def;
+        try {
+            return Appearance.valueOf(v);
+        } catch (IllegalArgumentException e) {
+            return def;
+        }
+    }
+
     private static VadMode parseVadMode(String v, VadMode def) {
         if (v == null) return def;
         try {
@@ -232,6 +302,20 @@ public final class Settings {
         }
     }
 
+    /**
+     * Converts a threshold saved under the old {@code vadThresholdDb} key, which was in
+     * dBFS ({@code 20*log10(rms)}), to {@link com.ts3client.audio.InputLevel}'s scale, so
+     * upgrading doesn't silently change how sensitive the gate is.
+     */
+    private static double migrateThreshold(String legacy, double def) {
+        double dbfs = parseD(legacy, Double.NaN);
+        if (Double.isNaN(dbfs)) {
+            return def;
+        }
+        double converted = com.ts3client.audio.InputLevel.powerToDb(Math.pow(10.0, dbfs / 10.0));
+        return Math.min(com.ts3client.audio.InputLevel.MAX_DB, converted);
+    }
+
     private static double parseD(String v, double def) {
         if (v == null) return def;
         try {

ts3-client/core/src/main/java/com/ts3client/hotkey/GlobalInputHook.java

@@ -0,0 +1,38 @@
+package com.ts3client.hotkey;
+
+/**
+ * A system-wide source of key and mouse-button events: it reports every press and
+ * release on the machine, whether or not the client has focus, and without swallowing
+ * the event on its way to the focused application.
+ *
+ * <p>Implementations are platform code and live outside the core; the core only ever
+ * sees this interface.
+ */
+public interface GlobalInputHook extends AutoCloseable {
+
+    interface Listener {
+        /**
+         * @param key     the key or button
+         * @param pressed {@code true} for a press, {@code false} for a release
+         */
+        void onInput(HotkeyKey key, boolean pressed);
+    }
+
+    /** Starts delivering events on a background thread. */
+    void start(Listener listener);
+
+    /** Whether events are actually being delivered; false when the platform refused. */
+    boolean isRunning();
+
+    /** Why the hook is not running, for the options dialog to show; empty when it is. */
+    String unavailableReason();
+
+    /**
+     * The name this system's layout gives a key, or {@code null} to let the caller fall
+     * back to {@link HotkeyKey#fallbackName()}.
+     */
+    String keyName(HotkeyKey key);
+
+    @Override
+    void close();
+}

ts3-client/core/src/main/java/com/ts3client/hotkey/Hotkey.java

@@ -0,0 +1,74 @@
+package com.ts3client.hotkey;
+
+/**
+ * A single binding: which combination triggers which action, on which edge of the
+ * keypress, and whether it reaches only the active server or every connected one.
+ */
+public final class Hotkey {
+
+    /** Which edge of the key press runs the action, as TS3's hotkey mode combo box offers. */
+    public enum Trigger {
+        /** Action triggers when the key is pressed down. */
+        KEY_DOWN("On key down"),
+        /** Action triggers when the key is released. */
+        KEY_UP("On key up");
+
+        private final String label;
+
+        Trigger(String label) {
+            this.label = label;
+        }
+
+        public String label() {
+            return label;
+        }
+    }
+
+    public HotkeyAction action;
+    public HotkeyCombo combo;
+    public Trigger trigger = Trigger.KEY_DOWN;
+    /** Apply to the active server only; when false the action reaches every connection. */
+    public boolean activeServerOnly = true;
+    /** Meaning depends on {@link HotkeyAction#argument()}; empty when the action takes none. */
+    public String argument = "";
+    public boolean enabled = true;
+
+    public Hotkey() {
+    }
+
+    public Hotkey(HotkeyAction action, HotkeyCombo combo) {
+        this.action = action;
+        this.combo = combo;
+    }
+
+    /**
+     * The binding's place in the action tree, as TS3 spells it out:
+     * {@code Sounds / Activate Soundpack / Default Sound Pack (Male)}.
+     */
+    public String path() {
+        if (action == null) return "";
+        StringBuilder sb = new StringBuilder();
+        if (!action.group().isEmpty()) sb.append(action.group()).append(" / ");
+        sb.append(action.label());
+        if (argument != null && !argument.isBlank()) sb.append(" / ").append(argument.trim());
+        return sb.toString();
+    }
+
+    public boolean isValid() {
+        return action != null && combo != null && !combo.isEmpty();
+    }
+
+    /** Whether the action is a per-server one, for which {@link #activeServerOnly} matters. */
+    public boolean isServerScoped() {
+        return action != null && action.category() != HotkeyAction.Category.MISC;
+    }
+
+    public Hotkey copy() {
+        Hotkey h = new Hotkey(action, combo);
+        h.trigger = trigger;
+        h.activeServerOnly = activeServerOnly;
+        h.argument = argument;
+        h.enabled = enabled;
+        return h;
+    }
+}

ts3-client/core/src/main/java/com/ts3client/hotkey/HotkeyAction.java

@@ -0,0 +1,366 @@
+package com.ts3client.hotkey;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * The catalogue of hotkey actions, reverse-engineered from the official TeamSpeak 3
+ * client (its hotkey dialog builds exactly this list, in this order).
+ *
+ * <p>Every entry keeps the identifiers TS3 itself uses — a numeric action type and a
+ * parameter keyword — so bindings stay recognisable and could be imported from, or
+ * exported to, the original client. {@link #supported()} tells whether this client
+ * can actually carry the action out; the rest are listed but greyed out.
+ *
+ * <p>{@link #advanced()} mirrors the dialog's "Show Advanced Actions" checkbox: TS3
+ * hides all but a handful of everyday actions until it is ticked.
+ */
+public enum HotkeyAction {
+
+    // ----- Server -----
+    CONNECT_CURRENT_TAB(Category.SERVER, 0x0010, "Server (current tab)",
+            "Connect to Server on Current Tab", false, Argument.BOOKMARK, true),
+    CONNECT_NEW_TAB(Category.SERVER, 0x0010, "Server (new tab)",
+            "Connect to Server in a New Tab", false, Argument.BOOKMARK, true),
+    DISCONNECT_CURRENT(Category.SERVER, 0x0020, "Current Server",
+            "Disconnect from Current Server", false, Argument.NONE, true),
+    DISCONNECT_ALL(Category.SERVER, 0x0020, "All Servers",
+            "Disconnect from All Servers", false, Argument.NONE, true),
+
+    MIC_ACTIVATE(Category.SERVER, 0x0030, "Activate",
+            "Activate Microphone (current tab)", true, Argument.NONE, true),
+    MIC_MUTE(Category.SERVER, 0x0030, "Mute",
+            "Mute Microphone", true, Argument.NONE, true),
+    MIC_UNMUTE(Category.SERVER, 0x0030, "Unmute",
+            "Unmute Microphone", true, Argument.NONE, true),
+    MIC_TOGGLE(Category.SERVER, 0x0030, "Toggle",
+            "Toggle Microphone Mute", false, Argument.NONE, true),
+    /**
+     * TS3's "local" mute silences capture without publishing a mute status, or playing
+     * a mute/unmute sound — unlike {@link #MIC_MUTE}.
+     */
+    MIC_LOCAL_UNMUTE(Category.SERVER, 0x0030, "ActivateLocalMute",
+            "Disable Local Mic Mute", true, Argument.NONE, true),
+    MIC_LOCAL_MUTE(Category.SERVER, 0x0030, "DeactivateLocalMute",
+            "Enable Local Mic Mute", true, Argument.NONE, true),
+    MIC_LOCAL_TOGGLE(Category.SERVER, 0x0030, "ToggleLocalMute",
+            "Toggle Local Mic Mute", true, Argument.NONE, true),
+
+    SPEAKER_MUTE(Category.SERVER, 0x0040, "Mute",
+            "Mute Speaker", true, Argument.NONE, true),
+    SPEAKER_UNMUTE(Category.SERVER, 0x0040, "Unmute",
+            "Unmute Speaker", true, Argument.NONE, true),
+    SPEAKER_TOGGLE(Category.SERVER, 0x0040, "Toggle",
+            "Toggle Speaker Mute", false, Argument.NONE, true),
+
+    AWAY_SET(Category.SERVER, 0x0050, "SetAway",
+            "Set Away", true, Argument.NONE, true),
+    AWAY_ONLINE(Category.SERVER, 0x0050, "SetOnline",
+            "Set Online", true, Argument.NONE, true),
+    AWAY_TOGGLE(Category.SERVER, 0x0050, "Toggle",
+            "Toggle Away Status", false, Argument.NONE, true),
+    AWAY_TOGGLE_WITH_MESSAGE(Category.SERVER, 0x0050, "Toggle With Message",
+            "Toggle Away Status with Message", true, Argument.TEXT, true),
+
+    COMMANDER_ACTIVATE(Category.SERVER, 0x0100, "Activate",
+            "Activate Channel Commander", true, Argument.NONE, true),
+    COMMANDER_DEACTIVATE(Category.SERVER, 0x0100, "Deactivate",
+            "Deactivate Channel Commander", true, Argument.NONE, true),
+    COMMANDER_TOGGLE(Category.SERVER, 0x0100, "Toggle",
+            "Toggle Channel Commander", true, Argument.NONE, true),
+
+    // ----- Self -----
+    CAPTURE_PROFILE_ACTIVATE(Category.SELF, 0x0110, "Activate",
+            "Activate Capture Profile", true, Argument.PROFILE, false),
+    CAPTURE_PROFILE_DEACTIVATE(Category.SELF, 0x0110, "Deactivate",
+            "Deactivate Capture Profile", true, Argument.PROFILE, false),
+    CAPTURE_PROFILE_TOGGLE(Category.SELF, 0x0110, "Toggle",
+            "Toggle Capture Profile", true, Argument.PROFILE, false),
+    PLAYBACK_PROFILE_ACTIVATE(Category.SELF, 0x0120, "Activate",
+            "Activate Playback Profile", true, Argument.PROFILE, false),
+    PLAYBACK_PROFILE_DEACTIVATE(Category.SELF, 0x0120, "Deactivate",
+            "Deactivate Playback Profile", true, Argument.PROFILE, false),
+    PLAYBACK_PROFILE_TOGGLE(Category.SELF, 0x0120, "Toggle",
+            "Toggle Playback Profile", true, Argument.PROFILE, false),
+    HOTKEY_PROFILE_ACTIVATE(Category.SELF, 0x0130, "Activate",
+            "Activate Hotkey Profile", true, Argument.PROFILE, false),
+    HOTKEY_PROFILE_DEACTIVATE(Category.SELF, 0x0130, "Deactivate",
+            "Deactivate Hotkey Profile", true, Argument.PROFILE, false),
+
+    PTT_ACTIVATE(Category.SELF, 0x0140, "Activate",
+            "Activate Push-to-Talk", false, Argument.NONE, true, true),
+    PTT_DEACTIVATE(Category.SELF, 0x0140, "Deactivate",
+            "Deactivate Push-to-Talk", true, Argument.NONE, true),
+    PTT_TOGGLE(Category.SELF, 0x0140, "Toggle",
+            "Toggle Push-to-Talk", true, Argument.NONE, true),
+
+    CHANNEL_SWITCH(Category.SELF, 0x0150, "Strict Channel",
+            "Switch to Channel", true, Argument.CHANNEL, true),
+    CHANNEL_NEXT(Category.SELF, 0x0150, "Next Channel",
+            "Switch to Next Channel (Global)", true, Argument.NONE, false),
+    CHANNEL_PREVIOUS(Category.SELF, 0x0150, "Previous Channel",
+            "Switch to Previous Channel (Global)", true, Argument.NONE, false),
+    CHANNEL_LAST_VISITED(Category.SELF, 0x0150, "Last Visited Channel",
+            "Switch to Last Visited Channel", true, Argument.NONE, false),
+    CHANNEL_NEXT_FAMILY(Category.SELF, 0x0150, "Next Channel Family",
+            "Switch to Next Channel (Channel Family)", true, Argument.NONE, false),
+    CHANNEL_PREVIOUS_FAMILY(Category.SELF, 0x0150, "Previous Channel Family",
+            "Switch to Previous Channel (Channel Family)", true, Argument.NONE, false),
+    CHANNEL_NEXT_LEVEL(Category.SELF, 0x0150, "Next Channel Level",
+            "Switch to Next Channel (Same Level)", true, Argument.NONE, false),
+    CHANNEL_PREVIOUS_LEVEL(Category.SELF, 0x0150, "Previous Channel Level",
+            "Switch to Previous Channel (Same Level)", true, Argument.NONE, false),
+
+    SERVER_TAB_SELECT(Category.SELF, 0x0160, "Strict Server",
+            "Select Server Tab", true, Argument.TEXT, true),
+    SERVER_TAB_NEXT(Category.SELF, 0x0160, "Next Server",
+            "Select Next Server Tab", true, Argument.NONE, true),
+    SERVER_TAB_PREVIOUS(Category.SELF, 0x0160, "Previous Server",
+            "Select Previous Server Tab", true, Argument.NONE, true),
+
+    SOUNDPACK_ACTIVATE(Category.SELF, 0x0170, "Activate",
+            "Activate Soundpack", true, Argument.PROFILE, false),
+    SOUND_MUTE(Category.SELF, 0x0170, "Mute",
+            "Mute Sounds", true, Argument.NONE, true),
+    SOUND_UNMUTE(Category.SELF, 0x0170, "Unmute",
+            "Unmute Sounds", true, Argument.NONE, true),
+    SOUND_TOGGLE(Category.SELF, 0x0170, "Toggle",
+            "Toggle Sound Mute", true, Argument.NONE, true),
+
+    WHISPER_PUSH_ACTIVATE(Category.SELF, 0x0180, "ActivatePushToWhisper",
+            "Activate Push-To-Whisper", true, Argument.TEXT, false, true),
+    WHISPER_PUSH_DEACTIVATE(Category.SELF, 0x0180, "DeactivatePushToWhisper",
+            "Deactivate Push-To-Whisper", true, Argument.TEXT, false),
+    WHISPER_REPLY_PUSH_ACTIVATE(Category.SELF, 0x0180, "ActivateReplyPushToWhisper",
+            "Activate Push-To-Reply to a Whisper", true, Argument.NONE, false, true),
+    WHISPER_REPLY_PUSH_DEACTIVATE(Category.SELF, 0x0180, "DeactivateReplyPushToWhisper",
+            "Deactivate Push-To-Reply to a Whisper", true, Argument.NONE, false),
+    WHISPERLIST_ACTIVATE(Category.SELF, 0x0180, "Activate",
+            "Activate Whisperlist", true, Argument.TEXT, false),
+    WHISPERLIST_DEACTIVATE(Category.SELF, 0x0180, "Deactivate",
+            "Deactivate Whisperlist", true, Argument.TEXT, false),
+    WHISPER_REPLY_ACTIVATE(Category.SELF, 0x0180, "ActivateReply",
+            "Activate Reply to a Whisper", true, Argument.NONE, false),
+    WHISPER_REPLY_DEACTIVATE(Category.SELF, 0x0180, "DeactivateReply",
+            "Deactivate Reply to a Whisper", true, Argument.NONE, false),
+    WHISPER_BLOCK_ACTIVATE(Category.SELF, 0x0180, "ActivateBlock",
+            "Activate Block Incoming Whispers", true, Argument.NONE, false),
+    WHISPER_BLOCK_DEACTIVATE(Category.SELF, 0x0180, "DeactivateBlock",
+            "Deactivate Block Incoming Whispers", true, Argument.NONE, false),
+    WHISPER_BLOCK_TOGGLE(Category.SELF, 0x0180, "ToggleBlock",
+            "Toggle Block Incoming Whispers", true, Argument.NONE, false),
+
+    RECORDING_START(Category.SELF, 0x01c0, "Activate",
+            "Start Recording", true, Argument.NONE, false),
+    RECORDING_START_MULTITRACK(Category.SELF, 0x01c0, "ActivateMT",
+            "Start Multitrack Recording", true, Argument.NONE, false),
+    RECORDING_STOP(Category.SELF, 0x01c0, "Deactivate",
+            "Stop Recording", true, Argument.NONE, false),
+
+    VOLUME_INCREASE(Category.SELF, 0x01e0, "Increase",
+            "Increase Master Volume", true, Argument.NONE, true),
+    VOLUME_DECREASE(Category.SELF, 0x01e0, "Decrease",
+            "Decrease Master Volume", true, Argument.NONE, true),
+
+    PLUGIN_ACTIVATE(Category.SELF, 0x01f0, "Activate",
+            "Activate Plugin", true, Argument.TEXT, false),
+    PLUGIN_DEACTIVATE(Category.SELF, 0x01f0, "Deactivate",
+            "Deactivate Plugin", true, Argument.TEXT, false),
+    PLUGIN_TOGGLE(Category.SELF, 0x01f0, "Toggle",
+            "Toggle Plugin", true, Argument.TEXT, false),
+    PLUGIN_COMMAND(Category.SELF, 0x01f0, "Run",
+            "Run Plugin Command", true, Argument.TEXT, false),
+    PLUGIN_HOTKEY(Category.SELF, 0x01f0, "Hotkey",
+            "Plugin Hotkey", true, Argument.TEXT, false),
+
+    SERVER_GROUP_ASSIGN(Category.SELF, 0x0270, "AssignSG",
+            "Assign Server Group", true, Argument.TEXT, false),
+    SERVER_GROUP_REVOKE(Category.SELF, 0x0270, "RevokeSG",
+            "Revoke Server Group", true, Argument.TEXT, false),
+    SERVER_GROUP_TOGGLE(Category.SELF, 0x0270, "ToggleSG",
+            "Toggle Server Group", true, Argument.TEXT, false),
+
+    STYLESHEET_HELPER_ON(Category.SELF, 0x0240, "Activate",
+            "Stylesheet Helper (on)", true, Argument.NONE, false),
+    STYLESHEET_HELPER_OFF(Category.SELF, 0x0240, "Deactivate",
+            "Stylesheet Helper (off)", true, Argument.NONE, false),
+
+    SOUND_3D_ACTIVATE(Category.SELF, 0x0250, "Activate",
+            "Activate 3D Sound", true, Argument.NONE, false),
+    SOUND_3D_DEACTIVATE(Category.SELF, 0x0250, "Deactivate",
+            "Deactivate 3D Sound", true, Argument.NONE, false),
+    SOUND_3D_TOGGLE(Category.SELF, 0x0250, "Toggle",
+            "Toggle 3D Sound", true, Argument.NONE, false),
+
+    NICKNAME_CHANGE(Category.SELF, 0x01a0, "Rename",
+            "Change Nickname", true, Argument.TEXT, true),
+
+    // ----- Misc -----
+    TALK_POWER_GRANT_NEXT(Category.MISC, 0x01b0, "GrantNextTalkPower",
+            "Grant Next User Talk Power", true, Argument.NONE, false),
+    TALK_POWER_REQUEST(Category.MISC, 0x01b0, "RequestTalkPower",
+            "Request Talk Power", true, Argument.NONE, false),
+    TALK_POWER_REVOKE_ALL_GRANT_NEXT(Category.MISC, 0x01b0, "RevokeAllAndGrantNext",
+            "Revoke All And Grant Next User Talk Power", true, Argument.NONE, false),
+
+    FILEBROWSER(Category.MISC, 0x01d0, "Filebrowser",
+            "Open Filebrowser on Channel", true, Argument.NONE, true),
+    AUTOCONNECT_DISABLE(Category.MISC, 0x0200, "Autoconnect",
+            "Disable Autoconnect", true, Argument.NONE, false),
+    SKIN_RELOAD(Category.MISC, 0x0210, "SkinReload",
+            "Reload Skin", true, Argument.NONE, true),
+    BRING_TO_FRONT(Category.MISC, 0x0220, "Bring2Front",
+            "Bring Client to Front", true, Argument.NONE, true),
+    SEND_TO_BACK(Category.MISC, 0x0230, "Send2Back",
+            "Send Client to Background", true, Argument.NONE, true);
+
+    /** The three groups the TS3 hotkey dialog separates its list into. */
+    public enum Category {
+        SERVER("Server"),
+        SELF("Self"),
+        MISC("Misc");
+
+        private final String label;
+
+        Category(String label) {
+            this.label = label;
+        }
+
+        public String label() {
+            return label;
+        }
+    }
+
+    /**
+     * The group an action's type belongs to in TeamSpeak's hotkey tree, taken from the
+     * table its dialog builds. Types absent here are ungrouped: TS3 shows them as a
+     * single item directly under their category.
+     */
+    private static final Map<Integer, String> GROUPS = Map.ofEntries(
+            Map.entry(0x0010, "Connect to Server"),
+            Map.entry(0x0020, "Disconnect from Server"),
+            Map.entry(0x0030, "Microphone"),
+            Map.entry(0x0040, "Speaker"),
+            Map.entry(0x0050, "Away Status"),
+            Map.entry(0x0100, "Channel Commander"),
+            Map.entry(0x0110, "Capture Profile"),
+            Map.entry(0x0120, "Playback Profile"),
+            Map.entry(0x0130, "Hotkey Profile"),
+            Map.entry(0x0140, "Push-to-Talk"),
+            Map.entry(0x0150, "Switch to Channel"),
+            Map.entry(0x0160, "Select Server Tab"),
+            Map.entry(0x0170, "Sounds"),
+            Map.entry(0x0180, "Whisper"),
+            Map.entry(0x01b0, "Talk Power"),
+            Map.entry(0x01c0, "Recording"),
+            Map.entry(0x01e0, "Master Volume"),
+            Map.entry(0x01f0, "Plugins"),
+            Map.entry(0x0250, "3D Sound"),
+            Map.entry(0x0270, "Permissions"));
+
+    /** What the action's free-text parameter means, when it takes one. */
+    public enum Argument {
+        NONE,
+        /** Label of a bookmark to connect to. */
+        BOOKMARK,
+        /** Channel path, "/"-separated. */
+        CHANNEL,
+        /** Name of a capture/playback/hotkey profile or sound pack. */
+        PROFILE,
+        /** Anything else: nickname, away message, tab number, plugin command. */
+        TEXT
+    }
+
+    private final Category category;
+    private final int type;
+    private final String parameter;
+    private final String label;
+    private final boolean advanced;
+    private final Argument argument;
+    private final boolean supported;
+    private final boolean momentary;
+
+    HotkeyAction(Category category, int type, String parameter, String label,
+                 boolean advanced, Argument argument, boolean supported) {
+        this(category, type, parameter, label, advanced, argument, supported, false);
+    }
+
+    HotkeyAction(Category category, int type, String parameter, String label,
+                 boolean advanced, Argument argument, boolean supported, boolean momentary) {
+        this.category = category;
+        this.type = type;
+        this.parameter = parameter;
+        this.label = label;
+        this.advanced = advanced;
+        this.argument = argument;
+        this.supported = supported;
+        this.momentary = momentary;
+    }
+
+    public Category category() {
+        return category;
+    }
+
+    /** TS3's numeric action type; actions sharing one differ only by {@link #parameter()}. */
+    public int type() {
+        return type;
+    }
+
+    /**
+     * The node this action hangs under in the hotkey tree ("Sounds", "Microphone", …),
+     * or an empty string for the actions TS3 lists on their own.
+     */
+    public String group() {
+        return GROUPS.getOrDefault(type, "");
+    }
+
+    /** TS3's parameter keyword, e.g. {@code Toggle} or {@code ActivateReply}. */
+    public String parameter() {
+        return parameter;
+    }
+
+    /** The name shown in the hotkey list. */
+    public String label() {
+        return label;
+    }
+
+    /** Hidden until "Show advanced actions" is ticked, as in TS3. */
+    public boolean advanced() {
+        return advanced;
+    }
+
+    public Argument argument() {
+        return argument;
+    }
+
+    /** Whether this client implements the action; unsupported ones cannot be bound. */
+    public boolean supported() {
+        return supported;
+    }
+
+    /**
+     * Whether the action lasts only while the hotkey is held (push-to-talk and the
+     * push-to-whisper variants), in which case the trigger setting does not apply and
+     * the release is reported as well.
+     */
+    public boolean momentary() {
+        return momentary;
+    }
+
+    public static List<HotkeyAction> of(Category category, boolean includeAdvanced) {
+        List<HotkeyAction> out = new ArrayList<>();
+        for (HotkeyAction a : values()) {
+            if (a.category == category && (includeAdvanced || !a.advanced)) out.add(a);
+        }
+        return out;
+    }
+
+    /** Looks an action up by its enum name, falling back to {@code null}. */
+    public static HotkeyAction byName(String name) {
+        for (HotkeyAction a : values()) {
+            if (a.name().equals(name)) return a;
+        }
+        return null;
+    }
+}

ts3-client/core/src/main/java/com/ts3client/hotkey/HotkeyCombo.java

@@ -0,0 +1,94 @@
+package com.ts3client.hotkey;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+import java.util.function.Function;
+
+/**
+ * A key combination: one key or button, or several that have to be held together.
+ * There is no distinguished modifier — as in TS3, any key can take that role, and the
+ * combination fires once every one of its keys is down.
+ */
+public final class HotkeyCombo {
+
+    /** Recording order, which is also the order the combination is displayed in. */
+    private final List<HotkeyKey> keys;
+
+    public HotkeyCombo(Collection<HotkeyKey> keys) {
+        List<HotkeyKey> copy = new ArrayList<>();
+        for (HotkeyKey k : keys) {
+            if (k != null && !copy.contains(k)) copy.add(k);
+        }
+        this.keys = Collections.unmodifiableList(copy);
+    }
+
+    public List<HotkeyKey> keys() {
+        return keys;
+    }
+
+    public boolean isEmpty() {
+        return keys.isEmpty();
+    }
+
+    public boolean contains(HotkeyKey key) {
+        return keys.contains(key);
+    }
+
+    /** Whether every key of the combination is currently held down. */
+    public boolean isSatisfiedBy(Set<HotkeyKey> pressed) {
+        return !keys.isEmpty() && pressed.containsAll(keys);
+    }
+
+    /** Serialised form, e.g. {@code Keyboard:37+Keyboard:45}. */
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        for (HotkeyKey k : keys) {
+            if (sb.length() > 0) sb.append('+');
+            sb.append(k);
+        }
+        return sb.toString();
+    }
+
+    public static HotkeyCombo parse(String text) {
+        List<HotkeyKey> keys = new ArrayList<>();
+        if (text != null && !text.isBlank()) {
+            for (String part : text.split("\\+")) {
+                HotkeyKey k = HotkeyKey.parse(part);
+                if (k != null) keys.add(k);
+            }
+        }
+        return new HotkeyCombo(keys);
+    }
+
+    /**
+     * Renders the combination for the user, e.g. {@code Ctrl+Mouse 4}.
+     *
+     * @param namer resolves a key to its name on this system, typically from the
+     *              keyboard layout; may return {@code null} to fall back
+     */
+    public String display(Function<HotkeyKey, String> namer) {
+        if (keys.isEmpty()) return "No hotkey assigned";
+        StringBuilder sb = new StringBuilder();
+        for (HotkeyKey k : keys) {
+            String name = namer == null ? null : namer.apply(k);
+            if (name == null || name.isBlank()) name = k.fallbackName();
+            if (sb.length() > 0) sb.append(" + ");
+            sb.append(name);
+        }
+        return sb.toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        return o instanceof HotkeyCombo other && keys.equals(other.keys);
+    }
+
+    @Override
+    public int hashCode() {
+        return keys.hashCode();
+    }
+}

ts3-client/core/src/main/java/com/ts3client/hotkey/HotkeyEngine.java

@@ -0,0 +1,154 @@
+package com.ts3client.hotkey;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Turns the raw stream of global key events into hotkey activations: it tracks which
+ * keys are down, decides when a binding's combination becomes (or stops being)
+ * satisfied, and reports that on the configured edge.
+ *
+ * <p>While a {@link Recorder} is installed the engine records combinations instead of
+ * firing them, which is how the hotkey dialog captures a new binding without the old
+ * ones going off.
+ */
+public final class HotkeyEngine implements GlobalInputHook.Listener {
+
+    /** Receives activations; called on the input hook's thread. */
+    public interface Handler {
+        /**
+         * @param hotkey the binding that fired
+         * @param active {@code true} on activation; a {@code false} call follows on release
+         *               for {@link HotkeyAction#momentary()} actions only
+         */
+        void onHotkey(Hotkey hotkey, boolean active);
+    }
+
+    /** Collects a combination as the user presses it, for the "set hotkey" button. */
+    public interface Recorder {
+        /** The keys held so far, in press order; called on every change. */
+        void onRecording(HotkeyCombo combo);
+
+        /** The user let go of everything: this is the final combination. */
+        void onRecorded(HotkeyCombo combo);
+    }
+
+    private final Hotkeys hotkeys;
+    private final Handler handler;
+
+    private final Set<HotkeyKey> pressed = new LinkedHashSet<>();
+    /** Bindings whose combination is currently held, so a release can end them. */
+    private final Set<Hotkey> active = new HashSet<>();
+
+    private volatile Recorder recorder;
+    private final Set<HotkeyKey> recording = new LinkedHashSet<>();
+
+    public HotkeyEngine(Hotkeys hotkeys, Handler handler) {
+        this.hotkeys = hotkeys;
+        this.handler = handler;
+    }
+
+    /**
+     * Diverts every event into {@code recorder} until {@link #stopRecording()}; the
+     * bindings themselves stay silent meanwhile.
+     */
+    public void record(Recorder recorder) {
+        synchronized (this) {
+            recording.clear();
+            releaseActive();
+            pressed.clear();
+        }
+        this.recorder = recorder;
+    }
+
+    public void stopRecording() {
+        recorder = null;
+        synchronized (this) {
+            recording.clear();
+            pressed.clear();
+        }
+    }
+
+    @Override
+    public void onInput(HotkeyKey key, boolean down) {
+        Recorder rec = recorder;
+        if (rec != null) {
+            recordKey(rec, key, down);
+            return;
+        }
+
+        List<Runnable> fired = new ArrayList<>();
+        synchronized (this) {
+            if (down) {
+                if (!pressed.add(key)) return;
+            } else if (!pressed.remove(key)) {
+                return;
+            }
+
+            synchronized (hotkeys.all()) {
+                for (Hotkey h : hotkeys.all()) {
+                    if (!h.enabled || !h.isValid() || !h.action.supported()) continue;
+                    if (!h.combo.contains(key)) continue;
+
+                    boolean satisfied = h.combo.isSatisfiedBy(pressed);
+                    if (satisfied && active.add(h)) {
+                        if (h.action.momentary() || h.trigger == Hotkey.Trigger.KEY_DOWN) {
+                            fired.add(() -> handler.onHotkey(h, true));
+                        }
+                    } else if (!satisfied && active.remove(h)) {
+                        if (h.action.momentary()) {
+                            fired.add(() -> handler.onHotkey(h, false));
+                        } else if (h.trigger == Hotkey.Trigger.KEY_UP) {
+                            fired.add(() -> handler.onHotkey(h, true));
+                        }
+                    }
+                }
+            }
+        }
+        for (Runnable r : fired) r.run();
+    }
+
+    private void recordKey(Recorder rec, HotkeyKey key, boolean down) {
+        HotkeyCombo combo;
+        boolean finished;
+        synchronized (this) {
+            if (down) {
+                recording.add(key);
+                pressed.add(key);
+            } else {
+                pressed.remove(key);
+            }
+            combo = new HotkeyCombo(recording);
+            finished = !down && pressed.isEmpty() && !recording.isEmpty();
+            if (finished) recording.clear();
+        }
+        if (finished) {
+            rec.onRecorded(combo);
+        } else {
+            rec.onRecording(combo);
+        }
+    }
+
+    /** Ends every held binding, so nothing stays stuck when the hook stops. */
+    public void releaseAll() {
+        List<Runnable> fired = new ArrayList<>();
+        synchronized (this) {
+            for (Hotkey h : active) {
+                if (h.action.momentary()) fired.add(() -> handler.onHotkey(h, false));
+            }
+            active.clear();
+            pressed.clear();
+        }
+        for (Runnable r : fired) r.run();
+    }
+
+    private void releaseActive() {
+        for (Hotkey h : new ArrayList<>(active)) {
+            if (h.action.momentary()) handler.onHotkey(h, false);
+        }
+        active.clear();
+    }
+}

ts3-client/core/src/main/java/com/ts3client/hotkey/HotkeyKey.java

@@ -0,0 +1,88 @@
+package com.ts3client.hotkey;
+
+/**
+ * One physical key or mouse button. Keys are identified by their position rather than by
+ * the character they produce, so a binding is independent of the keyboard layout in force
+ * when it was recorded.
+ *
+ * <p>The keyboard numbering is whatever the platform's own is — X keycodes (Linux evdev
+ * code + 8) on X11, set-1 scan codes with the {@code E0}/{@code E1} escape in the high
+ * byte on Windows — because that is what its input API reports and its key-naming call
+ * expects. Bindings are therefore per-machine, which is also how TeamSpeak stores them.
+ * Mouse buttons are unified on the X numbering everywhere, side buttons included.
+ *
+ * @param device which input device the code belongs to
+ * @param code   the platform's key code for {@link Device#KEYBOARD}, an X-style button
+ *               number for {@link Device#MOUSE}
+ */
+public record HotkeyKey(HotkeyKey.Device device, int code) {
+
+    public enum Device {
+        KEYBOARD("Keyboard"),
+        MOUSE("Mouse");
+
+        private final String prefix;
+
+        Device(String prefix) {
+            this.prefix = prefix;
+        }
+
+        String prefix() {
+            return prefix;
+        }
+    }
+
+    public static HotkeyKey keyboard(int keycode) {
+        return new HotkeyKey(Device.KEYBOARD, keycode);
+    }
+
+    public static HotkeyKey mouse(int button) {
+        return new HotkeyKey(Device.MOUSE, button);
+    }
+
+    /** Serialised form, matching TS3's {@code Keyboard:9} / {@code Mouse:9} notation. */
+    @Override
+    public String toString() {
+        return device.prefix() + ":" + code;
+    }
+
+    public static HotkeyKey parse(String text) {
+        if (text == null) return null;
+        int colon = text.indexOf(':');
+        if (colon <= 0) return null;
+        String prefix = text.substring(0, colon).trim();
+        int code;
+        try {
+            code = Integer.parseInt(text.substring(colon + 1).trim());
+        } catch (NumberFormatException e) {
+            return null;
+        }
+        for (Device d : Device.values()) {
+            if (d.prefix().equalsIgnoreCase(prefix)) return new HotkeyKey(d, code);
+        }
+        return null;
+    }
+
+    /**
+     * A readable name that needs no help from the platform: mouse buttons carry the
+     * numbering users know them by, keys fall back to their raw code.
+     */
+    public String fallbackName() {
+        if (device == Device.MOUSE) {
+            return switch (code) {
+                case 1 -> "Mouse Left";
+                case 2 -> "Mouse Middle";
+                case 3 -> "Mouse Right";
+                case 4 -> "Wheel Up";
+                case 5 -> "Wheel Down";
+                case 6 -> "Wheel Left";
+                case 7 -> "Wheel Right";
+                // X hands the side buttons out as 8 and 9; everyone else calls them 4 and 5.
+                case 8 -> "Mouse 4";
+                case 9 -> "Mouse 5";
+                default -> "Mouse " + code;
+            };
+        }
+        return "Key " + code;
+    }
+}

ts3-client/core/src/main/java/com/ts3client/hotkey/Hotkeys.java

@@ -0,0 +1,109 @@
+package com.ts3client.hotkey;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Properties;
+
+/**
+ * The user's hotkey bindings, stored alongside the settings file.
+ * Frontend-agnostic: no UI dependencies.
+ */
+public final class Hotkeys {
+
+    private static final File DIR = new File(System.getProperty("user.home"), ".ts3jclient");
+    private static final File FILE = new File(DIR, "hotkeys.properties");
+
+    private final List<Hotkey> entries = Collections.synchronizedList(new ArrayList<>());
+
+    /** Live view; iterate under {@code synchronized (all())} when the engine may be running. */
+    public List<Hotkey> all() {
+        return entries;
+    }
+
+    public void add(Hotkey hotkey) {
+        entries.add(hotkey);
+    }
+
+    public void set(int index, Hotkey hotkey) {
+        if (index >= 0 && index < entries.size()) entries.set(index, hotkey);
+    }
+
+    public void remove(int index) {
+        if (index >= 0 && index < entries.size()) entries.remove(index);
+    }
+
+    /** Replaces every binding at once, e.g. when the options dialog is applied. */
+    public void replaceAll(List<Hotkey> hotkeys) {
+        synchronized (entries) {
+            entries.clear();
+            for (Hotkey h : hotkeys) {
+                if (h != null && h.isValid()) entries.add(h);
+            }
+        }
+    }
+
+    public static Hotkeys load() {
+        Hotkeys h = new Hotkeys();
+        if (!FILE.isFile()) return h;
+        Properties p = new Properties();
+        try (FileInputStream in = new FileInputStream(FILE)) {
+            p.load(in);
+        } catch (Exception e) {
+            return h;
+        }
+        int count = parseInt(p.getProperty("count"), 0);
+        for (int i = 0; i < count; i++) {
+            String prefix = "hotkey." + i + ".";
+            HotkeyAction action = HotkeyAction.byName(p.getProperty(prefix + "action", ""));
+            if (action == null) continue;
+            Hotkey entry = new Hotkey(action, HotkeyCombo.parse(p.getProperty(prefix + "keys", "")));
+            entry.trigger = "KEY_UP".equals(p.getProperty(prefix + "trigger"))
+                    ? Hotkey.Trigger.KEY_UP : Hotkey.Trigger.KEY_DOWN;
+            entry.activeServerOnly = !"false".equals(p.getProperty(prefix + "activeServerOnly"));
+            entry.argument = p.getProperty(prefix + "argument", "");
+            entry.enabled = !"false".equals(p.getProperty(prefix + "enabled"));
+            if (entry.isValid()) h.entries.add(entry);
+        }
+        return h;
+    }
+
+    public void save() {
+        Properties p = new Properties();
+        synchronized (entries) {
+            p.setProperty("count", Integer.toString(entries.size()));
+            for (int i = 0; i < entries.size(); i++) {
+                Hotkey e = entries.get(i);
+                String prefix = "hotkey." + i + ".";
+                p.setProperty(prefix + "action", e.action.name());
+                p.setProperty(prefix + "keys", e.combo.toString());
+                p.setProperty(prefix + "trigger", e.trigger.name());
+                p.setProperty(prefix + "activeServerOnly", Boolean.toString(e.activeServerOnly));
+                p.setProperty(prefix + "argument", e.argument == null ? "" : e.argument);
+                p.setProperty(prefix + "enabled", Boolean.toString(e.enabled));
+            }
+        }
+        try {
+            if (!DIR.isDirectory()) {
+                //noinspection ResultOfMethodCallIgnored
+                DIR.mkdirs();
+            }
+            try (FileOutputStream out = new FileOutputStream(FILE)) {
+                p.store(out, "TS3J client hotkeys");
+            }
+        } catch (Exception ignored) {
+        }
+    }
+
+    private static int parseInt(String v, int def) {
+        if (v == null) return def;
+        try {
+            return Integer.parseInt(v.trim());
+        } catch (NumberFormatException e) {
+            return def;
+        }
+    }
+}

ts3-client/core/src/main/java/com/ts3client/net/ChannelAdmin.java

@@ -0,0 +1,275 @@
+package com.ts3client.net;
+
+import com.github.manevolent.ts3j.api.Channel;
+import com.github.manevolent.ts3j.command.MultiCommand;
+import com.github.manevolent.ts3j.command.SingleCommand;
+import com.github.manevolent.ts3j.command.parameter.CommandSingleParameter;
+import com.github.manevolent.ts3j.event.UnknownTeamspeakEvent;
+import com.github.manevolent.ts3j.protocol.ProtocolRole;
+import com.ts3client.net.filetransfer.FileTransfer;
+import com.ts3client.net.filetransfer.FileTransferManager;
+import com.ts3client.net.filetransfer.RemoteFile;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import java.util.zip.CRC32;
+
+/**
+ * Everything the channel editor needs of the server: reading and writing a channel's
+ * properties and its needed-power permissions, plus the virtual server's icon store.
+ *
+ * <p>Split out of {@link TeamspeakConnection} because it is a self-contained request/
+ * response corner of the protocol that only the editor uses. Every call here blocks and
+ * must run off the UI thread; the connection's public wrappers do that.
+ */
+final class ChannelAdmin {
+
+    /** The directory a server's icons live in, where the server has one. */
+    private static final String ICON_DIRECTORY = "icons";
+
+    /** How long to wait for a whole icon to travel over the file connection. */
+    private static final long ICON_UPLOAD_TIMEOUT_MS = 30_000;
+
+    private final TeamspeakConnection conn;
+
+    /**
+     * The {@code channelpermlist} reply in progress. TeamSpeak answers the command with a
+     * burst of {@code notifychannelpermlist} events rather than a command response, and
+     * only the first of them repeats the channel id, so one request may be in flight at a
+     * time and its entries are collected here until the command itself completes.
+     */
+    private volatile PermRequest permRequest;
+
+    ChannelAdmin(TeamspeakConnection conn) {
+        this.conn = conn;
+    }
+
+    // ---- channel properties ----
+
+    /** Reads a channel's full property set. */
+    ChannelSettings readSettings(int channelId) throws Exception {
+        Channel info = conn.socket().getChannelInfo(channelId);
+        if (info == null) throw new IllegalStateException("The server did not describe that channel");
+        return ChannelSettings.from(channelId, info.getMap());
+    }
+
+    /**
+     * Creates a channel below {@code parentId} (0 being the top level).
+     *
+     * @param properties the new channel's properties, as {@link ChannelSettings#creationParameters}
+     * @return the new channel's id
+     */
+    int create(int parentId, Map<String, String> properties) throws Exception {
+        SingleCommand cmd = new SingleCommand("channelcreate", ProtocolRole.CLIENT);
+        cmd.add(new CommandSingleParameter("cpid", Integer.toString(parentId)));
+        for (Map.Entry<String, String> property : properties.entrySet()) {
+            cmd.add(new CommandSingleParameter(property.getKey(), property.getValue()));
+        }
+        for (SingleCommand answer : conn.socket().executeCommand(cmd).get()) {
+            int cid = parseInt(answer.toMap().get("cid"), -1);
+            if (cid > 0) return cid;
+        }
+        // Some servers acknowledge the command without naming the channel; the
+        // notifychannelcreated they also send does name it, so read it off the model
+        // once that event has been handled.
+        conn.awaitEventsProcessed();
+        ChannelNode created = conn.getModel().findChannelByName(parentId, properties.get("channel_name"));
+        if (created == null) throw new IllegalStateException("The server did not report the new channel");
+        return created.id;
+    }
+
+    /** Applies {@code changes} (property name to value) with a single {@code channeledit}. */
+    void edit(int channelId, Map<String, String> changes) throws Exception {
+        if (changes.isEmpty()) return;
+        SingleCommand cmd = new SingleCommand("channeledit", ProtocolRole.CLIENT);
+        cmd.add(new CommandSingleParameter("cid", Integer.toString(channelId)));
+        for (Map.Entry<String, String> change : changes.entrySet()) {
+            cmd.add(new CommandSingleParameter(change.getKey(), change.getValue()));
+        }
+        conn.socket().executeCommand(cmd).complete();
+    }
+
+    // ---- channel permissions ----
+
+    /**
+     * Reads the permissions set directly on a channel.
+     *
+     * @return permission name to value, holding only the permissions the channel itself
+     *         carries — anything inherited from a group is absent
+     */
+    Map<String, Integer> readPermissions(int channelId) throws Exception {
+        if (!conn.getModel().hasPermissionNames()) {
+            // channelpermlist reports numeric ids, which only the permissionlist response
+            // gives names to; without it the values could not be told apart.
+            throw new IllegalStateException("The server did not send its permission list");
+        }
+        PermRequest request = new PermRequest(channelId);
+        permRequest = request;
+        try {
+            SingleCommand cmd = new SingleCommand("channelpermlist", ProtocolRole.CLIENT,
+                    new CommandSingleParameter("cid", Integer.toString(channelId)));
+            conn.socket().executeCommand(cmd).complete();
+            // The entries were queued on the event thread before the command's own reply
+            // was read, so draining that thread is what guarantees they have all landed.
+            conn.awaitEventsProcessed();
+        } finally {
+            permRequest = null;
+        }
+
+        Map<String, Integer> byName = new LinkedHashMap<>();
+        for (Map.Entry<Integer, Integer> entry : request.values.entrySet()) {
+            String name = conn.getModel().permissionName(entry.getKey());
+            if (name != null) byName.put(name, entry.getValue());
+        }
+        return byName;
+    }
+
+    /** Collects one {@code notifychannelpermlist} entry for the request in flight. */
+    void onPermListEntry(UnknownTeamspeakEvent e) {
+        PermRequest request = permRequest;
+        if (request == null) return;
+        String cid = e.get("cid");
+        if (cid != null && !cid.isEmpty() && parseInt(cid, -1) != request.channelId) return;
+        int permId = parseInt(e.get("permid"), -1);
+        if (permId >= 0) request.values.put(permId, parseInt(e.get("permvalue"), 0));
+    }
+
+    /**
+     * Sets and clears channel permissions by name. A permission set to a value is added or
+     * updated; one that is cleared is removed so the channel inherits it again.
+     */
+    void writePermissions(int channelId, Map<String, Integer> set, Collection<String> remove)
+            throws Exception {
+        if (!set.isEmpty()) {
+            List<SingleCommand> parts = new ArrayList<>(set.size());
+            for (Map.Entry<String, Integer> perm : set.entrySet()) {
+                parts.add(new SingleCommand("channeladdperm", ProtocolRole.CLIENT,
+                        new CommandSingleParameter("permsid", perm.getKey()),
+                        new CommandSingleParameter("permvalue", Integer.toString(perm.getValue()))));
+            }
+            send("channeladdperm", channelId, parts);
+        }
+        if (!remove.isEmpty()) {
+            List<SingleCommand> parts = new ArrayList<>(remove.size());
+            for (String name : remove) {
+                parts.add(new SingleCommand("channeldelperm", ProtocolRole.CLIENT,
+                        new CommandSingleParameter("permsid", name)));
+            }
+            send("channeldelperm", channelId, parts);
+        }
+    }
+
+    private void send(String name, int channelId, List<SingleCommand> parts) throws Exception {
+        MultiCommand cmd = new MultiCommand(name, ProtocolRole.CLIENT, parts);
+        cmd.add(new CommandSingleParameter("cid", Integer.toString(channelId)));
+        conn.socket().executeCommand(cmd).complete();
+    }
+
+    // ---- the server's icon store ----
+
+    /**
+     * The ids of the icons uploaded to this virtual server, which live in channel 0's file
+     * repository as {@code /icon_<id>}.
+     */
+    List<Long> listIcons() throws Exception {
+        List<Long> ids = new ArrayList<>();
+        boolean hasIconDirectory = false;
+        for (RemoteFile file : fileTransfers().list(0, "", "/")) {
+            if (file.isDirectory()) {
+                hasIconDirectory |= file.getName().equals(ICON_DIRECTORY);
+                continue;
+            }
+            addIcon(ids, file);
+        }
+        // Newer servers keep the icons in their own directory rather than loose in the
+        // repository's root; both layouts exist, so whichever this server uses is read.
+        if (hasIconDirectory) {
+            for (RemoteFile file : fileTransfers().list(0, "", "/" + ICON_DIRECTORY)) {
+                if (!file.isDirectory()) addIcon(ids, file);
+            }
+        }
+        return ids;
+    }
+
+    private static void addIcon(List<Long> ids, RemoteFile file) {
+        if (!file.getName().startsWith("icon_")) return;
+        long id = parseLong(file.getName().substring("icon_".length()));
+        if (id > 0 && !ids.contains(id)) ids.add(id);
+    }
+
+    /**
+     * Uploads an image as a server icon.
+     *
+     * @return the icon's id, which TeamSpeak derives from the file's CRC32
+     */
+    long uploadIcon(File source) throws Exception {
+        byte[] data = Files.readAllBytes(source.toPath());
+        if (data.length == 0) throw new IllegalArgumentException("That file is empty");
+        if (data.length > TeamspeakConnection.MAX_ICON_BYTES) {
+            throw new IllegalArgumentException("Icons may not be larger than "
+                    + (TeamspeakConnection.MAX_ICON_BYTES / 1024) + " KiB");
+        }
+        CRC32 crc = new CRC32();
+        crc.update(data);
+        long id = crc.getValue();
+
+        CountDownLatch done = new CountDownLatch(1);
+        FileTransfer transfer = fileTransfers().upload(0, "", "/icon_" + id, source, true, t -> {
+            if (t.isDone()) done.countDown();
+        });
+        if (!done.await(ICON_UPLOAD_TIMEOUT_MS, TimeUnit.MILLISECONDS)) {
+            throw new IllegalStateException("The upload did not finish in time");
+        }
+        if (transfer.getState() != FileTransfer.State.COMPLETED) {
+            throw new IllegalStateException(transfer.getErrorMessage() == null
+                    ? "The upload failed" : transfer.getErrorMessage());
+        }
+        return id;
+    }
+
+    void deleteIcon(long iconId) throws Exception {
+        fileTransfers().delete(0, "", "/icon_" + iconId);
+    }
+
+    private FileTransferManager fileTransfers() {
+        FileTransferManager ft = conn.fileTransfers();
+        if (ft == null) throw new IllegalStateException("Not connected");
+        return ft;
+    }
+
+    // ---- helpers ----
+
+    private static int parseInt(String value, int fallback) {
+        try {
+            return value == null || value.isEmpty() ? fallback : Integer.parseInt(value.trim());
+        } catch (NumberFormatException e) {
+            return fallback;
+        }
+    }
+
+    private static long parseLong(String value) {
+        try {
+            return Long.parseLong(value.trim());
+        } catch (NumberFormatException e) {
+            return 0;
+        }
+    }
+
+    /** One in-flight {@code channelpermlist} and the entries received for it so far. */
+    private static final class PermRequest {
+        final int channelId;
+        final Map<Integer, Integer> values = new ConcurrentHashMap<>();
+
+        PermRequest(int channelId) {
+            this.channelId = channelId;
+        }
+    }
+}

ts3-client/core/src/main/java/com/ts3client/net/ChannelSettings.java

@@ -0,0 +1,216 @@
+package com.ts3client.net;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+/**
+ * The editable properties of a channel, as read from {@code channelinfo} and written
+ * back with {@code channeledit}.
+ *
+ * <p>Kept apart from {@link ChannelNode} on purpose: the node is the live tree state the
+ * server pushes at us, while this is a snapshot an editor works on. Submitting compares
+ * the edited copy against the untouched original ({@link #changesFrom}) so only the
+ * properties the user actually changed are sent — TeamSpeak refuses the whole command
+ * when it contains one property the client may not modify, even an unchanged one.
+ */
+public final class ChannelSettings {
+
+    /** How long a channel outlives its last occupant. */
+    public enum Type {TEMPORARY, SEMI_PERMANENT, PERMANENT}
+
+    public int id;
+    public int parentId;
+    public String name = "";
+    public String topic = "";
+    public String description = "";
+    public String phoneticName = "";
+    /** Whether the server reports a password on this channel; the password itself is never readable. */
+    public boolean hasPassword;
+    /** {@code null} leaves the password alone, {@code ""} removes it, anything else sets it. */
+    public String password;
+    public Type type = Type.PERMANENT;
+    public boolean defaultChannel;
+    /** The sibling this channel sorts after, or 0 to sort first. */
+    public int order;
+    public int neededTalkPower;
+    /** TeamSpeak codec id; see {@code com.github.manevolent.ts3j.api.Codec}. */
+    public int codec = 4;
+    public int codecQuality = 6;
+    public boolean encrypted = true;
+    public int deleteDelay;
+    public boolean maxClientsUnlimited = true;
+    public int maxClients = 16;
+    public boolean familyInherited = true;
+    public boolean familyUnlimited;
+    public int maxFamilyClients = 16;
+    public long iconId;
+
+    /** Reads a {@code channelinfo} (or {@code channellist}) property map. */
+    public static ChannelSettings from(int channelId, Map<String, String> props) {
+        ChannelSettings s = new ChannelSettings();
+        s.id = channelId;
+        s.parentId = intOf(props, "pid", intOf(props, "cpid", 0));
+        s.name = strOf(props, "channel_name");
+        s.topic = strOf(props, "channel_topic");
+        s.description = strOf(props, "channel_description");
+        s.phoneticName = strOf(props, "channel_name_phonetic");
+        s.hasPassword = boolOf(props, "channel_flag_password");
+        if (boolOf(props, "channel_flag_permanent")) s.type = Type.PERMANENT;
+        else if (boolOf(props, "channel_flag_semi_permanent")) s.type = Type.SEMI_PERMANENT;
+        else s.type = Type.TEMPORARY;
+        s.defaultChannel = boolOf(props, "channel_flag_default");
+        s.order = intOf(props, "channel_order", 0);
+        s.neededTalkPower = intOf(props, "channel_needed_talk_power", 0);
+        s.codec = intOf(props, "channel_codec", 4);
+        s.codecQuality = intOf(props, "channel_codec_quality", 6);
+        s.encrypted = !boolOf(props, "channel_codec_is_unencrypted");
+        s.deleteDelay = intOf(props, "channel_delete_delay", 0);
+        s.maxClientsUnlimited = boolOf(props, "channel_flag_maxclients_unlimited");
+        s.maxClients = Math.max(0, intOf(props, "channel_maxclients", 16));
+        s.familyInherited = boolOf(props, "channel_flag_maxfamilyclients_inherited");
+        s.familyUnlimited = boolOf(props, "channel_flag_maxfamilyclients_unlimited");
+        s.maxFamilyClients = Math.max(0, intOf(props, "channel_maxfamilyclients", 16));
+        s.iconId = longOf(props, "channel_icon_id");
+        return s;
+    }
+
+    public ChannelSettings copy() {
+        ChannelSettings c = new ChannelSettings();
+        c.id = id;
+        c.parentId = parentId;
+        c.name = name;
+        c.topic = topic;
+        c.description = description;
+        c.phoneticName = phoneticName;
+        c.hasPassword = hasPassword;
+        c.password = password;
+        c.type = type;
+        c.defaultChannel = defaultChannel;
+        c.order = order;
+        c.neededTalkPower = neededTalkPower;
+        c.codec = codec;
+        c.codecQuality = codecQuality;
+        c.encrypted = encrypted;
+        c.deleteDelay = deleteDelay;
+        c.maxClientsUnlimited = maxClientsUnlimited;
+        c.maxClients = maxClients;
+        c.familyInherited = familyInherited;
+        c.familyUnlimited = familyUnlimited;
+        c.maxFamilyClients = maxFamilyClients;
+        c.iconId = iconId;
+        return c;
+    }
+
+    /**
+     * The {@code channeledit} parameters needed to turn {@code original} into this.
+     *
+     * @return property name to value, empty when nothing changed
+     */
+    public Map<String, String> changesFrom(ChannelSettings original) {
+        Map<String, String> changes = new LinkedHashMap<>();
+        putIfChanged(changes, "channel_name", name, original.name);
+        putIfChanged(changes, "channel_topic", topic, original.topic);
+        putIfChanged(changes, "channel_description", description, original.description);
+        putIfChanged(changes, "channel_name_phonetic", phoneticName, original.phoneticName);
+        if (password != null) changes.put("channel_password", password);
+        if (type != original.type) {
+            // The three flags are mutually exclusive and the server wants the whole set:
+            // clearing one without setting another leaves the channel type ambiguous.
+            changes.put("channel_flag_permanent", flag(type == Type.PERMANENT));
+            changes.put("channel_flag_semi_permanent", flag(type == Type.SEMI_PERMANENT));
+            changes.put("channel_flag_temporary", flag(type == Type.TEMPORARY));
+        }
+        // Clearing the default flag is meaningless — some channel has to be the default —
+        // so only setting it is ever sent.
+        if (defaultChannel && !original.defaultChannel) changes.put("channel_flag_default", "1");
+        putIfChanged(changes, "channel_order", order, original.order);
+        putIfChanged(changes, "channel_needed_talk_power", neededTalkPower, original.neededTalkPower);
+        putIfChanged(changes, "channel_codec", codec, original.codec);
+        putIfChanged(changes, "channel_codec_quality", codecQuality, original.codecQuality);
+        putIfChanged(changes, "channel_codec_is_unencrypted", !encrypted, !original.encrypted);
+        putIfChanged(changes, "channel_delete_delay", deleteDelay, original.deleteDelay);
+        putIfChanged(changes, "channel_flag_maxclients_unlimited",
+                maxClientsUnlimited, original.maxClientsUnlimited);
+        if (!maxClientsUnlimited) putIfChanged(changes, "channel_maxclients", maxClients, original.maxClients);
+        putIfChanged(changes, "channel_flag_maxfamilyclients_inherited",
+                familyInherited, original.familyInherited);
+        putIfChanged(changes, "channel_flag_maxfamilyclients_unlimited",
+                familyUnlimited, original.familyUnlimited);
+        if (!familyInherited && !familyUnlimited) {
+            putIfChanged(changes, "channel_maxfamilyclients", maxFamilyClients, original.maxFamilyClients);
+        }
+        if (iconId != original.iconId) changes.put("channel_icon_id", Long.toString(iconId));
+        return changes;
+    }
+
+    /**
+     * The {@code channelcreate} parameters for a channel that does not exist yet.
+     *
+     * <p>Everything a fresh channel would get anyway is left out, because TeamSpeak checks
+     * a create permission per property that is present — a client allowed to create plain
+     * channels but not, say, ones with a topic must not send an empty topic. What the
+     * server cannot infer is always sent: the name, the channel type (whose absent flags
+     * would silently mean temporary), the codec, and the client limits when they are not
+     * unlimited.
+     */
+    public Map<String, String> creationParameters() {
+        Map<String, String> params = changesFrom(new ChannelSettings());
+        params.put("channel_name", name);
+        params.put("channel_flag_permanent", flag(type == Type.PERMANENT));
+        params.put("channel_flag_semi_permanent", flag(type == Type.SEMI_PERMANENT));
+        params.put("channel_flag_temporary", flag(type == Type.TEMPORARY));
+        params.put("channel_codec", Integer.toString(codec));
+        params.put("channel_codec_quality", Integer.toString(codecQuality));
+        if (!maxClientsUnlimited) params.put("channel_maxclients", Integer.toString(maxClients));
+        if (!familyInherited && !familyUnlimited) {
+            params.put("channel_maxfamilyclients", Integer.toString(maxFamilyClients));
+        }
+        if (password == null || password.isEmpty()) params.remove("channel_password");
+        return params;
+    }
+
+    private static void putIfChanged(Map<String, String> into, String key, String value, String was) {
+        if (!value.equals(was)) into.put(key, value);
+    }
+
+    private static void putIfChanged(Map<String, String> into, String key, int value, int was) {
+        if (value != was) into.put(key, Integer.toString(value));
+    }
+
+    private static void putIfChanged(Map<String, String> into, String key, boolean value, boolean was) {
+        if (value != was) into.put(key, flag(value));
+    }
+
+    private static String flag(boolean set) {
+        return set ? "1" : "0";
+    }
+
+    private static String strOf(Map<String, String> props, String key) {
+        String v = props.get(key);
+        return v == null ? "" : v;
+    }
+
+    private static boolean boolOf(Map<String, String> props, String key) {
+        return "1".equals(props.get(key));
+    }
+
+    private static int intOf(Map<String, String> props, String key, int fallback) {
+        try {
+            String v = props.get(key);
+            return v == null || v.isEmpty() ? fallback : Integer.parseInt(v.trim());
+        } catch (NumberFormatException e) {
+            return fallback;
+        }
+    }
+
+    private static long longOf(Map<String, String> props, String key) {
+        try {
+            String v = props.get(key);
+            if (v == null || v.isEmpty()) return 0;
+            long id = Long.parseLong(v.trim());
+            return id < 0 ? id & 0xFFFFFFFFL : id;
+        } catch (NumberFormatException e) {
+            return 0;
+        }
+    }
+}

ts3-client/core/src/main/java/com/ts3client/net/ClientEntry.java

@@ -6,6 +6,7 @@ public final class ClientEntry {
     public int channelId;
     public String nickname;
     public String uniqueId = "";
+    public int databaseId;
     public int type;              // 0 = normal voice client, 1 = server-query
     public int talkPower;
 
@@ -21,6 +22,10 @@ public final class ClientEntry {
     public boolean talking;
     public boolean inputMuted;    // microphone muted (client_input_muted)
     public boolean outputMuted;   // speakers muted / deafened (client_output_muted)
+    /** False while the capture device is unavailable: another tab holds the microphone. */
+    public boolean inputHardware = true;
+    /** False while the playback device is unavailable. */
+    public boolean outputHardware = true;
     public boolean away;
     /** The message published with the away state, empty when there is none. */
     public String awayMessage = "";
@@ -35,4 +40,28 @@ public final class ClientEntry {
     public boolean isQuery() {
         return type == 1;
     }
+
+    /** Adds a server group id, if not already present. */
+    public void addServerGroup(int groupId) {
+        for (int id : serverGroupIds) if (id == groupId) return;
+        int[] updated = java.util.Arrays.copyOf(serverGroupIds, serverGroupIds.length + 1);
+        updated[serverGroupIds.length] = groupId;
+        serverGroupIds = updated;
+    }
+
+    /** Removes a server group id, if present. */
+    public void removeServerGroup(int groupId) {
+        int index = -1;
+        for (int i = 0; i < serverGroupIds.length; i++) {
+            if (serverGroupIds[i] == groupId) {
+                index = i;
+                break;
+            }
+        }
+        if (index < 0) return;
+        int[] updated = new int[serverGroupIds.length - 1];
+        System.arraycopy(serverGroupIds, 0, updated, 0, index);
+        System.arraycopy(serverGroupIds, index + 1, updated, index, serverGroupIds.length - index - 1);
+        serverGroupIds = updated;
+    }
 }

ts3-client/core/src/main/java/com/ts3client/net/ConnectionEventHandler.java

@@ -0,0 +1,629 @@
+package com.ts3client.net;
+
+import com.github.manevolent.ts3j.event.*;
+import com.ts3client.sound.SoundEvent;
+import com.ts3client.sound.SoundNotifier;
+
+import java.util.Map;
+
+/**
+ * The {@link TS3Listener} side of a connection: keeps {@link ServerModel} in sync with
+ * incoming notify events, mirrors native TeamSpeak's server-tab log lines, and picks the
+ * matching {@link SoundEvent} for each one. Registered alongside {@link TeamspeakConnection}
+ * itself (which keeps only the lifecycle-critical {@code onDisconnected} callback) so this
+ * class can stay focused on "event arrived, update state and tell the user" and nothing else.
+ */
+final class ConnectionEventHandler implements TS3Listener {
+
+    // ---- who went where: TeamSpeak's reason ids ----
+
+    /** {@code reasonid} of a client view/move notification. */
+    private static final int REASON_SWITCHED = 0;
+    private static final int REASON_MOVED = 1;
+    private static final int REASON_TIMEOUT = 3;
+    private static final int REASON_CHANNEL_KICK = 4;
+    private static final int REASON_SERVER_KICK = 5;
+    private static final int REASON_BAN = 6;
+
+    private final TeamspeakConnection conn;
+
+    ConnectionEventHandler(TeamspeakConnection conn) {
+        this.conn = conn;
+    }
+
+    @Override
+    public void onClientJoin(ClientJoinEvent e) {
+        ClientEntry c = conn.getModel().putClient(e.getClientId(), e.getClientNickname(), e.getClientTargetId());
+        c.type = safeInt(e, "client_type");
+        c.talkPower = e.getClientTalkPower();
+        c.inputMuted = e.isClientInputMuted();
+        c.outputMuted = e.isClientOutputMuted();
+        c.inputHardware = e.isClientUsingHardwareInput();
+        c.outputHardware = e.isClientUsingHardwareOutput();
+        c.away = e.isClientAway();
+        c.awayMessage = TeamspeakConnection.orEmpty(e.get("client_away_message"));
+        c.uniqueId = TeamspeakConnection.orEmpty(e.getUniqueClientIdentifier());
+        c.databaseId = e.getClientDatabaseId();
+        c.serverGroupIds = parseIntList(e.getClientServerGroups());
+        c.channelGroupId = e.getClientChannelGroupId();
+        c.self = (e.getClientId() == conn.getSelfClientId());
+        if (e.getClientId() != conn.getSelfClientId()) {
+            announceClientEntered(e);
+            logClientEntered(e);
+        }
+        conn.ui.onModelChanged();
+    }
+
+    @Override
+    public void onClientLeave(ClientLeaveEvent e) {
+        if (e.getClientId() == conn.getSelfClientId()) {
+            announceOwnRemoval(safeInt(e, "reasonid"), e);
+        } else {
+            String name = conn.clientLink(e.getClientId());
+            announceClientLeft(e);
+            logClientLeft(e, name);
+        }
+        conn.getModel().removeClient(e.getClientId());
+        if (conn.getPlayback() != null) conn.getPlayback().removeClient(e.getClientId());
+        conn.ui.onModelChanged();
+    }
+
+    @Override
+    public void onClientMoved(ClientMovedEvent e) {
+        ClientEntry c = conn.getModel().getClient(e.getClientId());
+        if (c != null) {
+            int from = c.channelId;
+            c.channelId = e.getTargetChannelId();
+            if (e.getClientId() == conn.getSelfClientId()) {
+                announceOwnMove(safeInt(e, "reasonid"), e);
+            } else {
+                announceClientMoved(safeInt(e, "reasonid"), e.getClientId(), from, e.getTargetChannelId());
+                logClientMoved(e, conn.clientLink(c.id), from, e.getTargetChannelId());
+            }
+            conn.ui.onModelChanged();
+        }
+    }
+
+    /** A client became visible to us, logged the way native TS3's server tab does. */
+    private void logClientEntered(ClientJoinEvent e) {
+        String name = conn.clientLink(e.getClientId(),
+                TeamspeakConnection.orEmpty(e.getUniqueClientIdentifier()), e.getClientNickname());
+        switch (safeInt(e, "reasonid")) {
+            case REASON_MOVED:
+                conn.log(name + " appears, coming from channel \"" + conn.channelLink(e.getClientFromId()) + "\"");
+                break;
+            case REASON_CHANNEL_KICK:
+                conn.log(name + " appears, was kicked from channel \"" + conn.channelLink(e.getClientFromId())
+                        + "\" by " + invokerName(e));
+                break;
+            case REASON_SWITCHED:
+                conn.log(name + " switched to channel \"" + conn.channelLink(e.getClientTargetId())
+                        + "\", coming from channel \"" + conn.channelLink(e.getClientFromId()) + "\"");
+                break;
+            default:
+                conn.log(name + " connected to channel \"" + conn.channelLink(e.getClientTargetId()) + "\"");
+        }
+    }
+
+    /** A client stopped being visible to us. */
+    private void logClientLeft(ClientLeaveEvent e, String name) {
+        String reasonMsg = TeamspeakConnection.orEmpty(e.get("reasonmsg"));
+        String suffix = reasonMsg.isEmpty() ? "" : " (" + reasonMsg + ")";
+        switch (safeInt(e, "reasonid")) {
+            case REASON_TIMEOUT:
+                conn.log(name + " dropped (ping timeout)");
+                break;
+            case REASON_SERVER_KICK:
+                conn.log(name + " was kicked from the server by " + invokerName(e) + suffix);
+                break;
+            case REASON_BAN:
+                conn.log(name + " was banned from the server by " + invokerName(e) + suffix);
+                break;
+            case REASON_CHANNEL_KICK:
+                conn.log(name + " left: was kicked to channel \"" + conn.channelLink(e.getClientTargetId())
+                        + "\" by " + invokerName(e) + suffix);
+                break;
+            case REASON_MOVED:
+                conn.log(name + " left, heading to channel \"" + conn.channelLink(e.getClientTargetId()) + "\"");
+                break;
+            case REASON_SWITCHED:
+                conn.log(name + " left, switched to channel \"" + conn.channelLink(e.getClientTargetId()) + "\"");
+                break;
+            default:
+                conn.log(name + " disconnected");
+        }
+    }
+
+    /** A client we can see moved between two channels we can see. */
+    private void logClientMoved(ClientMovedEvent e, String name, int fromChannel, int toChannel) {
+        String reasonMsg = TeamspeakConnection.orEmpty(e.get("reasonmsg"));
+        String suffix = reasonMsg.isEmpty() ? "" : " (" + reasonMsg + ")";
+        switch (safeInt(e, "reasonid")) {
+            case REASON_MOVED:
+                conn.log(name + " was moved from channel \"" + conn.channelLink(fromChannel) + "\" to \""
+                        + conn.channelLink(toChannel) + "\" by " + invokerName(e));
+                break;
+            case REASON_CHANNEL_KICK:
+                conn.log(name + " was kicked from channel \"" + conn.channelLink(fromChannel) + "\" to \""
+                        + conn.channelLink(toChannel) + "\" by " + invokerName(e) + suffix);
+                break;
+            default:
+                conn.log(name + " switched from channel \"" + conn.channelLink(fromChannel) + "\" to \""
+                        + conn.channelLink(toChannel) + "\"");
+        }
+    }
+
+    /**
+     * A client became visible: either they just connected, or they moved in from a
+     * channel we could not see — TeamSpeak's "appears" case.
+     */
+    private void announceClientEntered(ClientJoinEvent e) {
+        if (!conn.isConnected()) return;
+        int clientId = e.getClientId();
+        boolean current = conn.inOwnChannel(e.getClientTargetId());
+        Map<String, String> vars = conn.clientVars(clientId, e.getClientNickname());
+        switch (safeInt(e, "reasonid")) {
+            case REASON_MOVED:
+                conn.sound(current ? SoundEvent.CLIENT_MOVED_TO_CURRENT_CHANNEL_APPEARS
+                        : SoundEvent.CLIENT_MOVED_TO_OTHER_CHANNEL_APPEARS, vars);
+                break;
+            case REASON_CHANNEL_KICK:
+                conn.sound(current ? SoundEvent.CLIENT_WAS_KICKED_FROM_CHANNEL_TO_CURRENT_CHANNEL_APPEARS
+                        : SoundEvent.CLIENT_WAS_KICKED_FROM_CHANNEL_TO_OTHER_CHANNEL_APPEARS, vars);
+                break;
+            case REASON_SWITCHED:
+                conn.sound(current ? SoundEvent.CLIENT_SWITCHED_TO_CURRENT_CHANNEL_APPEARS
+                        : SoundEvent.CLIENT_SWITCHED_TO_OTHER_CHANNEL_APPEARS, vars);
+                break;
+            default:
+                conn.sound(current ? SoundEvent.CLIENT_CONNECTION_CONNECTED_CURRENT_CHANNEL
+                        : SoundEvent.CLIENT_CONNECTION_CONNECTED_SERVER, vars);
+        }
+    }
+
+    /** A client stopped being visible: they left the server, or moved out of sight. */
+    private void announceClientLeft(ClientLeaveEvent e) {
+        if (!conn.isConnected()) return;
+        int clientId = e.getClientId();
+        boolean current = conn.inOwnChannel(e.getClientFromId());
+        Map<String, String> vars = conn.clientVars(clientId, null);
+        switch (safeInt(e, "reasonid")) {
+            case REASON_TIMEOUT:
+                conn.sound(current ? SoundEvent.CLIENT_CONNECTION_LOST_CONNECTION_CURRENT_CHANNEL
+                        : SoundEvent.CLIENT_CONNECTION_LOST_CONNECTION_SERVER, vars);
+                break;
+            case REASON_SERVER_KICK:
+                conn.sound(current ? SoundEvent.CLIENT_WAS_KICKED_FROM_SERVER_CURRENT_CHANNEL
+                        : SoundEvent.CLIENT_WAS_KICKED_FROM_SERVER_SERVER, vars);
+                break;
+            case REASON_BAN:
+                conn.sound(current ? SoundEvent.CLIENT_WAS_BANNED_CURRENT_CHANNEL
+                        : SoundEvent.CLIENT_WAS_BANNED_SERVER, vars);
+                break;
+            case REASON_CHANNEL_KICK:
+                conn.sound(current ? SoundEvent.CLIENT_WAS_KICKED_FROM_CHANNEL_FROM_CURRENT_CHANNEL_DISAPPEARS
+                        : SoundEvent.CLIENT_WAS_KICKED_FROM_CHANNEL_TO_OTHER_CHANNEL_DISAPPEARS, vars);
+                break;
+            case REASON_MOVED:
+                conn.sound(current ? SoundEvent.CLIENT_MOVED_FROM_CURRENT_CHANNEL_DISAPPEARS
+                        : SoundEvent.CLIENT_MOVED_TO_OTHER_CHANNEL_DISAPPEARS, vars);
+                break;
+            case REASON_SWITCHED:
+                conn.sound(current ? SoundEvent.CLIENT_SWITCHED_FROM_CURRENT_CHANNEL_DISAPPEARS
+                        : SoundEvent.CLIENT_SWITCHED_TO_OTHER_CHANNEL_DISAPPEARS, vars);
+                break;
+            default:
+                conn.sound(current ? SoundEvent.CLIENT_CONNECTION_DISCONNECTED_CURRENT_CHANNEL
+                        : SoundEvent.CLIENT_CONNECTION_DISCONNECTED_SERVER, vars);
+        }
+    }
+
+    /** A client we can see moved between two channels we can see ("stays"). */
+    private void announceClientMoved(int reason, int clientId, int fromChannel, int toChannel) {
+        if (!conn.isConnected()) return;
+        boolean toCurrent = conn.inOwnChannel(toChannel);
+        boolean fromCurrent = conn.inOwnChannel(fromChannel);
+        Map<String, String> vars = conn.clientVars(clientId, null);
+        switch (reason) {
+            case REASON_MOVED:
+                conn.sound(toCurrent ? SoundEvent.CLIENT_MOVED_TO_CURRENT_CHANNEL_STAYS
+                        : fromCurrent ? SoundEvent.CLIENT_MOVED_FROM_CURRENT_CHANNEL_STAYS
+                        : SoundEvent.CLIENT_MOVED_TO_OTHER_CHANNEL_STAYS, vars);
+                break;
+            case REASON_CHANNEL_KICK:
+                conn.sound(toCurrent ? SoundEvent.CLIENT_WAS_KICKED_FROM_CHANNEL_TO_CURRENT_CHANNEL_STAYS
+                        : fromCurrent ? SoundEvent.CLIENT_WAS_KICKED_FROM_CHANNEL_FROM_CURRENT_CHANNEL_STAYS
+                        : SoundEvent.CLIENT_WAS_KICKED_FROM_CHANNEL_TO_OTHER_CHANNEL_STAYS, vars);
+                break;
+            default:
+                conn.sound(toCurrent ? SoundEvent.CLIENT_SWITCHED_TO_CURRENT_CHANNEL_STAYS
+                        : fromCurrent ? SoundEvent.CLIENT_SWITCHED_FROM_CURRENT_CHANNEL_STAYS
+                        : SoundEvent.CLIENT_SWITCHED_TO_OTHER_CHANNEL_STAYS, vars);
+        }
+    }
+
+    /** We changed channel ourselves, or somebody changed it for us. */
+    private void announceOwnMove(int reason, ClientMovedEvent e) {
+        if (!conn.isConnected()) return;
+        Map<String, String> vars = conn.channelVars(e.getTargetChannelId(), e.get("invokername"));
+        switch (reason) {
+            case REASON_MOVED:
+                conn.sound(SoundEvent.YOU_WERE_MOVED_TO_DIFFERENT_CHANNEL, vars);
+                break;
+            case REASON_CHANNEL_KICK:
+                conn.sound(SoundEvent.YOU_WERE_KICKED_FROM_CHANNEL, vars);
+                break;
+            default:
+                conn.sound(SoundEvent.YOU_SWITCHED_CHANNEL, vars);
+        }
+    }
+
+    /** We were removed from the server (kick or ban); the disconnect follows. */
+    private void announceOwnRemoval(int reason, ClientLeaveEvent e) {
+        if (!conn.isConnected()) return;
+        Map<String, String> vars = SoundNotifier.vars(
+                "servername", conn.getModel().getServerName(),
+                "clientname", TeamspeakConnection.orEmpty(e.get("invokername")),
+                "reason", TeamspeakConnection.orEmpty(e.get("reasonmsg")));
+        if (reason == REASON_SERVER_KICK) {
+            conn.sound(SoundEvent.YOU_WERE_KICKED_FROM_SERVER, vars);
+        } else if (reason == REASON_BAN) {
+            conn.sound(SoundEvent.YOU_WERE_BANNED, vars);
+        }
+    }
+
+    @Override
+    public void onClientChanged(ClientUpdatedEvent e) {
+        ClientEntry c = conn.getModel().getClient(e.getClientId());
+        if (c == null) return;
+        boolean renamed = has(e, "client_nickname") && !e.get("client_nickname").equals(c.nickname);
+        String oldName = c.nickname;
+        if (renamed) c.nickname = e.get("client_nickname");
+        if (has(e, "client_input_muted")) c.inputMuted = e.getBoolean("client_input_muted");
+        if (has(e, "client_output_muted")) c.outputMuted = e.getBoolean("client_output_muted");
+        if (has(e, "client_input_hardware")) c.inputHardware = e.getBoolean("client_input_hardware");
+        if (has(e, "client_output_hardware")) c.outputHardware = e.getBoolean("client_output_hardware");
+        if (has(e, "client_away")) {
+            c.away = e.getBoolean("client_away");
+            // Both fields travel together, so an absent message here means "no message"
+            // — which `has` cannot tell from "not reported".
+            c.awayMessage = c.away ? TeamspeakConnection.orEmpty(e.get("client_away_message")) : "";
+        } else if (has(e, "client_away_message")) {
+            c.awayMessage = e.get("client_away_message");
+        }
+        if (has(e, "client_talk_power")) c.talkPower = e.getInt("client_talk_power");
+        if (has(e, "client_description")) {
+            c.description = e.get("client_description");
+            conn.ui.onInfoUpdated();
+        }
+        if (has(e, "client_is_channel_commander"))
+            c.channelCommander = e.getBoolean("client_is_channel_commander");
+        announceClientUpdate(e, c, renamed, oldName);
+        conn.ui.onModelChanged();
+    }
+
+    /** Renames, talk-power changes and recording flags all arrive as a client update. */
+    private void announceClientUpdate(ClientUpdatedEvent e, ClientEntry c, boolean renamed, String oldName) {
+        if (!conn.isConnected()) return;
+        boolean self = c.id == conn.getSelfClientId();
+        Map<String, String> vars = conn.clientVars(c.id, null);
+
+        if (renamed) {
+            conn.sound(safeInt(e, "invokerid") == conn.getSelfClientId()
+                    ? SoundEvent.CLIENT_RENAMED_BY_YOU : SoundEvent.CLIENT_RENAMED_BY_OTHER, vars);
+            conn.log(oldName + " is now known as " + conn.clientLink(c.id));
+        }
+        if (safeInt(e, "client_talk_request") > 0 && !self) {
+            conn.sound(SoundEvent.CLIENT_REQUESTED_TALK_POWER, vars);
+        }
+        if (self && has(e, "client_is_talker")) {
+            conn.sound(e.getBoolean("client_is_talker")
+                    ? SoundEvent.YOU_WERE_GRANTED_TALK_POWER : SoundEvent.YOU_WERE_REVOKED_TALK_POWER, vars);
+        }
+        if (!self && has(e, "client_is_recording")) {
+            boolean recording = e.getBoolean("client_is_recording");
+            if (!recording) {
+                conn.sound(SoundEvent.CLIENT_RECORDING_STOP, vars);
+            } else {
+                conn.sound(conn.inOwnChannel(c.channelId)
+                        ? SoundEvent.CLIENT_RECORDING_IN_CHANNEL : SoundEvent.CLIENT_RECORDING_START, vars);
+            }
+        }
+    }
+
+    @Override
+    public void onChannelCreate(ChannelCreateEvent e) {
+        int cid = e.getChannelId();
+        String name = e.get("channel_name");
+        int pid = safeInt(e, "cpid");
+        if (pid == 0) pid = safeInt(e, "pid");
+        int order = safeInt(e, "channel_order");
+        ChannelNode node = conn.getModel().putChannel(cid, name, pid, order);
+        long icon = TeamspeakConnection.safeLong(e, "channel_icon_id");
+        if (icon != 0) node.iconId = icon;
+        conn.getModel().relinkChannel(cid, pid, order);
+        if (conn.isConnected()) {
+            conn.sound(byInvoker(e, SoundEvent.CHANNEL_CREATED_BY_YOU, SoundEvent.CHANNEL_CREATED_BY_OTHER,
+                    SoundEvent.CHANNEL_CREATED_BY_OTHER), conn.channelVars(cid, e.get("invokername")));
+            conn.log("Channel \"" + conn.channelLink(cid) + "\" was created by " + invokerName(e));
+        }
+        conn.ui.onModelChanged();
+    }
+
+    @Override
+    public void onChannelDeleted(ChannelDeletedEvent e) {
+        int cid = e.getChannelId();
+        if (conn.isConnected()) {
+            conn.sound(byInvoker(e, SoundEvent.CHANNEL_DELETED_BY_YOU, SoundEvent.CHANNEL_DELETED_BY_OTHER,
+                    SoundEvent.CHANNEL_DELETED_BY_SERVER), conn.channelVars(cid, e.get("invokername")));
+            conn.log("Channel \"" + conn.channelName(cid) + "\" was deleted by " + invokerName(e));
+        }
+        conn.getModel().removeChannel(cid);
+        conn.ui.onModelChanged();
+    }
+
+    @Override
+    public void onChannelEdit(ChannelEditedEvent e) {
+        ChannelNode ch = conn.getModel().getChannel(safeInt(e, "cid"));
+        if (ch != null) {
+            if (has(e, "channel_name")) ch.name = e.get("channel_name");
+            if (has(e, "channel_order")) ch.order = e.getInt("channel_order");
+            if (has(e, "channel_icon_id")) ch.iconId = TeamspeakConnection.safeLong(e, "channel_icon_id");
+            if (has(e, "channel_topic")) ch.topic = e.get("channel_topic");
+            if (conn.isConnected()) {
+                boolean current = conn.inOwnChannel(ch.id);
+                conn.sound(current
+                        ? byInvoker(e, SoundEvent.CHANNEL_EDITED_CURRENT_BY_YOU,
+                        SoundEvent.CHANNEL_EDITED_CURRENT_BY_OTHER, SoundEvent.CHANNEL_EDITED_CURRENT_BY_OTHER)
+                        : byInvoker(e, SoundEvent.CHANNEL_EDITED_OTHER_BY_YOU,
+                        SoundEvent.CHANNEL_EDITED_OTHER_BY_OTHER, SoundEvent.CHANNEL_EDITED_OTHER_BY_SERVER),
+                        conn.channelVars(ch.id, e.get("invokername")));
+                conn.log("Channel \"" + conn.channelLink(ch.id) + "\" was edited by " + invokerName(e));
+            }
+            conn.ui.onModelChanged();
+        }
+    }
+
+    /**
+     * Descriptions never travel with the notify, so a cached one has to be re-fetched.
+     * Only channels whose description was already loaded are refreshed; the rest pick the
+     * new text up the first time they are looked at.
+     */
+    @Override
+    public void onChannelDescriptionChanged(ChannelDescriptionEditedEvent e) {
+        ChannelNode ch = conn.getModel().getChannel(safeInt(e, "cid"));
+        if (ch == null || !ch.descriptionLoaded) return;
+        ch.descriptionLoaded = false;
+        conn.requestChannelInfo(ch.id);
+    }
+
+    @Override
+    public void onChannelMoved(ChannelMovedEvent e) {
+        ChannelNode ch = conn.getModel().getChannel(safeInt(e, "cid"));
+        if (ch != null) {
+            int parent = has(e, "cpid") ? e.getInt("cpid") : ch.parentId;
+            int order = has(e, "order") ? e.getInt("order") : ch.order;
+            conn.getModel().relinkChannel(ch.id, parent, order);
+            if (conn.isConnected()) {
+                conn.sound(byInvoker(e, SoundEvent.CHANNEL_MOVED_BY_YOU, SoundEvent.CHANNEL_MOVED_BY_OTHER,
+                        SoundEvent.CHANNEL_MOVED_BY_OTHER), conn.channelVars(ch.id, e.get("invokername")));
+                conn.log("Channel \"" + conn.channelLink(ch.id) + "\" was moved by " + invokerName(e));
+            }
+            conn.ui.onModelChanged();
+        }
+    }
+
+    @Override
+    public void onChannelSubscribed(ChannelSubscribedEvent e) {
+        setSubscribed(safeInt(e, "cid"), true);
+    }
+
+    @Override
+    public void onChannelUnsubscribed(ChannelUnsubscribedEvent e) {
+        setSubscribed(safeInt(e, "cid"), false);
+    }
+
+    private void setSubscribed(int cid, boolean subscribed) {
+        ChannelNode ch = conn.getModel().getChannel(cid);
+        if (ch == null || ch.subscribed == subscribed) return;
+        ch.subscribed = subscribed;
+        conn.ui.onModelChanged();
+    }
+
+    @Override
+    public void onServerEdit(ServerEditedEvent e) {
+        if (has(e, "virtualserver_name")) conn.getModel().setServerName(e.get("virtualserver_name"));
+        if (conn.isConnected()) {
+            conn.sound(byInvoker(e, SoundEvent.SERVER_EDITED_BY_YOU, SoundEvent.SERVER_EDITED_BY_OTHER,
+                    SoundEvent.SERVER_EDITED_BY_OTHER), conn.serverVars());
+        }
+        conn.ui.onModelChanged();
+    }
+
+    @Override
+    public void onServerGroupClientAdded(ServerGroupClientAddedEvent e) {
+        ClientEntry c = conn.getModel().getClient(e.getClientId());
+        if (c != null) c.addServerGroup(e.getServerGroupId());
+        boolean self = e.getClientId() == conn.getSelfClientId();
+        conn.sound(self
+                ? byInvoker(e, SoundEvent.YOU_SERVERGROUP_ADDED_BY_USER, SoundEvent.YOU_SERVERGROUP_ADDED_BY_USER,
+                SoundEvent.YOU_SERVERGROUP_ADDED_BY_SERVER)
+                : byInvoker(e, SoundEvent.CLIENT_SERVERGROUP_ADDED_BY_USER,
+                SoundEvent.CLIENT_SERVERGROUP_ADDED_BY_USER, SoundEvent.CLIENT_SERVERGROUP_ADDED_BY_SERVER),
+                groupVars(e.getClientId(), e.getName()));
+        conn.log(clientLogName(e.getClientId()) + " was added to server group \"" + e.getName()
+                + "\" by " + invokerName(e) + ".");
+        conn.ui.onModelChanged();
+    }
+
+    @Override
+    public void onServerGroupClientDeleted(ServerGroupClientDeletedEvent e) {
+        int clientId = safeInt(e, "clid");
+        ClientEntry c = conn.getModel().getClient(clientId);
+        if (c != null) c.removeServerGroup(e.getServerGroupId());
+        boolean self = clientId == conn.getSelfClientId();
+        conn.sound(self
+                ? byInvoker(e, SoundEvent.YOU_SERVERGROUP_REMOVED_BY_USER,
+                SoundEvent.YOU_SERVERGROUP_REMOVED_BY_USER, SoundEvent.YOU_SERVERGROUP_REMOVED_BY_SERVER)
+                : byInvoker(e, SoundEvent.CLIENT_SERVERGROUP_REMOVED_BY_USER,
+                SoundEvent.CLIENT_SERVERGROUP_REMOVED_BY_USER, SoundEvent.CLIENT_SERVERGROUP_REMOVED_BY_SERVER),
+                groupVars(clientId, e.get("name")));
+        conn.log(clientLogName(clientId) + " was removed from server group \"" + TeamspeakConnection.orEmpty(e.get("name"))
+                + "\" by " + invokerName(e) + ".");
+        conn.ui.onModelChanged();
+    }
+
+    @Override
+    public void onClientChannelGroupChanged(ClientChannelGroupChangedEvent e) {
+        ClientEntry c = conn.getModel().getClient(e.getClientId());
+        if (c != null) c.channelGroupId = e.getChannelGroupId();
+        boolean self = e.getClientId() == conn.getSelfClientId();
+        String groupName = conn.getModel().channelGroupName(e.getChannelGroupId());
+        conn.sound(self
+                ? byInvoker(e, SoundEvent.YOU_CHANNELGROUP_CHANGED_BY_USER,
+                SoundEvent.YOU_CHANNELGROUP_CHANGED_BY_USER, SoundEvent.YOU_CHANNELGROUP_CHANGED_BY_SERVER)
+                : byInvoker(e, SoundEvent.CLIENT_CHANNELGROUP_CHANGED_BY_USER,
+                SoundEvent.CLIENT_CHANNELGROUP_CHANGED_BY_USER, SoundEvent.CLIENT_CHANNELGROUP_CHANGED_BY_SERVER),
+                groupVars(e.getClientId(), groupName));
+        conn.log("Channel group \"" + TeamspeakConnection.orEmpty(groupName) + "\" was assigned to "
+                + clientLogName(e.getClientId()) + " by " + invokerName(e) + ".");
+        conn.ui.onModelChanged();
+    }
+
+    /** A client's name for a log line, as a link, falling back to its id once it has left. */
+    private String clientLogName(int clientId) {
+        return conn.clientLink(clientId);
+    }
+
+    /** Picks the event variant matching who caused the change: us, another client, or the server. */
+    private SoundEvent byInvoker(BaseEvent e, SoundEvent byYou, SoundEvent byOther, SoundEvent byServer) {
+        int invoker = safeInt(e, "invokerid");
+        if (invoker == conn.getSelfClientId() && invoker != 0) return byYou;
+        return invoker == 0 ? byServer : byOther;
+    }
+
+    private Map<String, String> groupVars(int clientId, String groupName) {
+        Map<String, String> vars = conn.clientVars(clientId, null);
+        vars.put("groupname", TeamspeakConnection.orEmpty(groupName));
+        return vars;
+    }
+
+    @Override
+    public void onChannelList(ChannelListEvent e) {
+        // Incremental channel arriving during connect.
+        int cid = e.getChannelId();
+        String name = e.get("channel_name");
+        int pid = safeInt(e, "cpid");
+        int order = safeInt(e, "channel_order");
+        ChannelNode node = conn.getModel().putChannel(cid, name, pid, order);
+        long icon = TeamspeakConnection.safeLong(e, "channel_icon_id");
+        if (icon != 0) node.iconId = icon;
+    }
+
+    @Override
+    public void onServerGroupList(ServerGroupListEvent e) {
+        int id = safeInt(e, "sgid");
+        if (id > 0) conn.getModel().putServerGroup(toGroup(e, id));
+    }
+
+    @Override
+    public void onChannelGroupList(ChannelGroupListEvent e) {
+        int id = safeInt(e, "cgid");
+        if (id > 0) conn.getModel().putChannelGroup(toGroup(e, id));
+    }
+
+    private static Group toGroup(BaseEvent e, int id) {
+        return new Group(id, e.get("name"), TeamspeakConnection.safeLong(e, "iconid"), safeInt(e, "sortid"),
+                safeInt(e, "type"), safeInt(e, "n_member_addp"), safeInt(e, "n_member_removep"));
+    }
+
+    @Override
+    public void onPermissionList(PermissionListEvent e) {
+        conn.getModel().putPermissionName(e.get("permname"));
+    }
+
+    @Override
+    public void onClientNeededPermissions(ClientNeededPermissionsEvent e) {
+        conn.getModel().putSelfPermissionValue(safeInt(e, "permid"), safeInt(e, "permvalue"));
+    }
+
+    @Override
+    public void onTextMessage(TextMessageEvent e) {
+        if (e.getInvokerId() == conn.getSelfClientId()) return; // don't echo our own
+        ConnectionListener.ChatScope scope;
+        SoundEvent notification;
+        switch (e.getTargetMode()) {
+            case CLIENT:
+                scope = ConnectionListener.ChatScope.PRIVATE;
+                notification = SoundEvent.CHAT_RECEIVED_MESSAGE_CLIENT;
+                break;
+            case CHANNEL:
+                scope = ConnectionListener.ChatScope.CHANNEL;
+                notification = SoundEvent.CHAT_RECEIVED_MESSAGE_CHANNEL;
+                break;
+            default:
+                scope = ConnectionListener.ChatScope.SERVER;
+                notification = SoundEvent.CHAT_RECEIVED_MESSAGE_SERVER;
+                break;
+        }
+        conn.sound(notification, conn.clientVars(e.getInvokerId(), e.getInvokerName()));
+        conn.ui.onChat(scope, e.getInvokerId(), e.getInvokerName(), e.getMessage());
+    }
+
+    @Override
+    public void onClientPoke(ClientPokeEvent e) {
+        conn.sound(SoundEvent.OTHER_RECEIVED_POKE, conn.clientVars(e.getInvokerId(), e.getInvokerName()));
+        conn.ui.onPoke(TeamspeakConnection.orEmpty(e.getInvokerName()), TeamspeakConnection.orEmpty(e.get("msg")));
+    }
+
+    @Override
+    public void onUnknownEvent(UnknownTeamspeakEvent e) {
+        if ("notifyconnectioninfo".equals(e.getCommand())) conn.stats.onReport(e);
+        else if ("notifychannelpermlist".equals(e.getCommand())) conn.channels.onPermListEntry(e);
+    }
+
+    // ---- helpers ----
+
+    /** Who caused an event, linked where the server named them; "the server" when nobody did. */
+    private String invokerName(BaseEvent e) {
+        String name = TeamspeakConnection.orEmpty(e.get("invokername"));
+        if (name.isEmpty()) return "the server";
+        return conn.clientLink(safeInt(e, "invokerid"),
+                TeamspeakConnection.orEmpty(e.get("invokeruid")), name);
+    }
+
+    private static int safeInt(BaseEvent e, String key) {
+        try {
+            String v = e.get(key);
+            return v == null ? 0 : Integer.parseInt(v.trim());
+        } catch (Exception ex) {
+            return 0;
+        }
+    }
+
+    /**
+     * Whether the event actually carries a field. ts3j answers a missing key with an
+     * empty string rather than null, so a plain null check is always true — and a
+     * partial update (say, someone muting) would otherwise look like it reported
+     * every other field as well.
+     */
+    private static boolean has(BaseEvent e, String key) {
+        String value = e.get(key);
+        return value != null && !value.isEmpty();
+    }
+
+    /** Parses a comma-separated id list (e.g. server groups "6,12,15"). */
+    private static int[] parseIntList(String csv) {
+        if (csv == null || csv.isEmpty()) return new int[0];
+        String[] parts = csv.split(",");
+        int[] out = new int[parts.length];
+        int n = 0;
+        for (String p : parts) {
+            try {
+                out[n++] = Integer.parseInt(p.trim());
+            } catch (NumberFormatException ignored) {
+            }
+        }
+        return n == parts.length ? out : java.util.Arrays.copyOf(out, n);
+    }
+}

ts3-client/core/src/main/java/com/ts3client/net/ConnectionListener.java

@@ -33,4 +33,11 @@ public interface ConnectionListener {
 
     /** Someone poked the local client. */
     void onPoke(String fromName, String message);
+
+    /**
+     * Something happened on the server that native TS3 records in the server
+     * log: a client connecting/disconnecting/moving, a channel being edited,
+     * a group being (un)assigned, and so on.
+     */
+    void onServerLog(String message);
 }

ts3-client/core/src/main/java/com/ts3client/net/ConnectionStatsCollector.java

@@ -0,0 +1,300 @@
+package com.ts3client.net;
+
+import com.github.manevolent.ts3j.api.Client;
+import com.github.manevolent.ts3j.command.SingleCommand;
+import com.github.manevolent.ts3j.command.parameter.CommandSingleParameter;
+import com.github.manevolent.ts3j.event.UnknownTeamspeakEvent;
+import com.github.manevolent.ts3j.protocol.PacketKind;
+import com.github.manevolent.ts3j.protocol.ProtocolRole;
+import com.github.manevolent.ts3j.protocol.packet.statistics.PacketStatistics;
+import com.github.manevolent.ts3j.protocol.socket.client.LocalTeamspeakClientSocket;
+import com.github.manevolent.ts3j.util.Pair;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Consumer;
+
+/**
+ * Builds {@link ConnectionStats} snapshots for the info dialog. The local client's own
+ * figures are read straight from its live packet counters; a remote client's come from
+ * {@code getconnectioninfo}, whose {@code notifyconnectioninfo} report arrives
+ * asynchronously via {@link #onReport} and is matched back up by client id.
+ */
+final class ConnectionStatsCollector {
+
+    private final TeamspeakConnection conn;
+
+    /** Outstanding {@code getconnectioninfo} requests awaiting a server report, keyed by client id. */
+    private final Map<Integer, PendingConnInfo> pending = new ConcurrentHashMap<>();
+
+    ConnectionStatsCollector(TeamspeakConnection conn) {
+        this.conn = conn;
+    }
+
+    /** Drops any requests left over from a connection that just went away. */
+    void clear() {
+        pending.clear();
+    }
+
+    /**
+     * Fetches connection statistics for a client and delivers them to
+     * {@code callback} (invoked off the Swing EDT — the callback is responsible
+     * for marshalling). May be called repeatedly to poll.
+     */
+    void request(int clientId, Consumer<ConnectionStats> callback) {
+        if (clientId == conn.getSelfClientId()) {
+            new Thread(() -> callback.accept(buildLocalStats()), "ts3j-conninfo-self").start();
+        } else {
+            new Thread(() -> requestRemote(clientId, callback), "ts3j-conninfo").start();
+        }
+    }
+
+    /** Matches an asynchronously arriving {@code notifyconnectioninfo} report to its request. */
+    void onReport(UnknownTeamspeakEvent e) {
+        int clid = safeInt(e.get("clid"));
+        PendingConnInfo p = pending.remove(clid);
+        if (p == null) return;
+        applyConnectionFields(p.stats, e.getMap());
+        p.callback.accept(p.stats);
+    }
+
+    /** Builds a live snapshot of the local client's connection from its own counters. */
+    private ConnectionStats buildLocalStats() {
+        ConnectionStats s = new ConnectionStats();
+        s.clientId = conn.getSelfClientId();
+        s.self = true;
+        s.live = true;
+        s.packetLoss = 0; // the local client has no server->client loss figure
+
+        ClientEntry self = conn.getModel().getClient(conn.getSelfClientId());
+        if (self != null) {
+            s.nickname = self.nickname;
+            s.version = self.version;
+            s.platform = self.platform;
+            s.idleTimeMs = self.idleTimeMs;
+        }
+        long connectedAt = conn.connectedAtMs;
+        if (connectedAt > 0) s.connectedTimeMs = System.currentTimeMillis() - connectedAt;
+
+        LocalTeamspeakClientSocket c = conn.client;
+        if (c == null) return s;
+
+        try {
+            Pair<Double, Double> ping = c.getPing();
+            s.pingMs = ping.getKey() * 1000.0;
+            s.pingDeviationMs = ping.getValue() * 1000.0;
+        } catch (Exception ignored) {
+            // ping unavailable; leave as unknown
+        }
+
+        long pSent = 0, pRecv = 0, bSent = 0, bRecv = 0;
+        long bwSs = 0, bwRs = 0, bwSm = 0, bwRm = 0;
+        for (PacketKind kind : PacketKind.values()) {
+            PacketStatistics st = c.getStatistics(kind);
+            ConnectionStats.KindStats ks = new ConnectionStats.KindStats(mapKind(kind));
+            ks.packetLoss = 0; // the local client cannot measure its own server->client loss
+            ks.packetsSent = st.getSentPackets();
+            ks.packetsReceived = st.getReceivedPackets();
+            ks.bytesSent = st.getSentBytes();
+            ks.bytesReceived = st.getReceivedBytes();
+            ks.bandwidthSentLastSecond = st.getSentBytesLastSecond();
+            ks.bandwidthReceivedLastSecond = st.getReceivedBytesLastSecond();
+            ks.bandwidthSentLastMinute = st.getSentBytesLastMinute();
+            ks.bandwidthReceivedLastMinute = st.getReceivedBytesLastMinute();
+            s.perKind.add(ks);
+
+            pSent += ks.packetsSent;
+            pRecv += ks.packetsReceived;
+            bSent += ks.bytesSent;
+            bRecv += ks.bytesReceived;
+            bwSs += ks.bandwidthSentLastSecond;
+            bwRs += ks.bandwidthReceivedLastSecond;
+            bwSm += ks.bandwidthSentLastMinute;
+            bwRm += ks.bandwidthReceivedLastMinute;
+        }
+        s.packetsSentTotal = pSent;
+        s.packetsReceivedTotal = pRecv;
+        s.bytesSentTotal = bSent;
+        s.bytesReceivedTotal = bRecv;
+        s.bandwidthSentLastSecond = bwSs;
+        s.bandwidthReceivedLastSecond = bwRs;
+        s.bandwidthSentLastMinute = bwSm;
+        s.bandwidthReceivedLastMinute = bwRm;
+        return s;
+    }
+
+    /**
+     * Requests a remote client's connection info. First loads {@code clientinfo}
+     * for the stable fields, then issues {@code getconnectioninfo} whose
+     * {@code notifyconnectioninfo} report arrives asynchronously via
+     * {@link #onReport}. If the report does not arrive shortly (e.g. the
+     * server withholds it), the clientinfo-only snapshot is delivered instead.
+     */
+    private void requestRemote(int clientId, Consumer<ConnectionStats> callback) {
+        ConnectionStats s = new ConnectionStats();
+        s.clientId = clientId;
+        ClientEntry entry = conn.getModel().getClient(clientId);
+        if (entry != null) s.nickname = entry.nickname;
+
+        LocalTeamspeakClientSocket client = conn.client;
+        try {
+            Client c = client.getClientInfo(clientId);
+            if (c != null) {
+                s.version = TeamspeakConnection.orEmpty(c.getVersion());
+                s.platform = TeamspeakConnection.orEmpty(c.getPlatform());
+                s.ip = TeamspeakConnection.orEmpty(c.getIp());
+                s.idleTimeMs = c.getIdleTime();
+                if (entry == null) s.nickname = TeamspeakConnection.orEmpty(c.getNickname());
+                applyConnectionFields(s, c.getMap());
+            }
+        } catch (Exception ignored) {
+            // clientinfo may be permission-restricted; continue with what we have
+        }
+
+        PendingConnInfo p = new PendingConnInfo(callback, s);
+        pending.put(clientId, p);
+
+        boolean sent = false;
+        try {
+            SingleCommand cmd = new SingleCommand("getconnectioninfo", ProtocolRole.CLIENT,
+                    new CommandSingleParameter("clid", Integer.toString(clientId)));
+            client.executeCommand(cmd).complete();
+            sent = true;
+        } catch (Exception ignored) {
+            // command failed; fall back to the clientinfo snapshot below
+        }
+
+        if (sent) {
+            try {
+                Thread.sleep(700); // give notifyconnectioninfo a chance to arrive
+            } catch (InterruptedException ignored) {
+                Thread.currentThread().interrupt();
+            }
+        }
+        // If the report already arrived, onReport removed and delivered it.
+        if (pending.remove(clientId, p)) {
+            callback.accept(s);
+        }
+    }
+
+    /** Parses TeamSpeak {@code connection_*} fields from a command map into {@code s}. */
+    private static void applyConnectionFields(ConnectionStats s, Map<String, String> m) {
+        double ping = parseDouble(m.get("connection_ping"));
+        if (ping >= 0) s.pingMs = ping;
+        double dev = parseDouble(m.get("connection_ping_deviation"));
+        if (dev >= 0) s.pingDeviationMs = dev;
+        double loss = parseDouble(m.get("connection_packetloss_total"));
+        if (loss < 0) loss = parseDouble(m.get("connection_server2client_packetloss_total"));
+        if (loss >= 0) s.packetLoss = loss;
+
+        long connected = parseLong(m.get("connection_connected_time"));
+        if (connected >= 0) s.connectedTimeMs = connected;
+        String ip = m.get("connection_client_ip");
+        if (ip != null && !ip.isEmpty()) s.ip = ip;
+
+        s.packetsSentTotal = pick(s.packetsSentTotal, m.get("connection_packets_sent_total"));
+        s.packetsReceivedTotal = pick(s.packetsReceivedTotal, m.get("connection_packets_received_total"));
+        s.bytesSentTotal = pick(s.bytesSentTotal, m.get("connection_bytes_sent_total"));
+        s.bytesReceivedTotal = pick(s.bytesReceivedTotal, m.get("connection_bytes_received_total"));
+        s.bandwidthSentLastSecond =
+                pick(s.bandwidthSentLastSecond, m.get("connection_bandwidth_sent_last_second_total"));
+        s.bandwidthReceivedLastSecond =
+                pick(s.bandwidthReceivedLastSecond, m.get("connection_bandwidth_received_last_second_total"));
+        s.bandwidthSentLastMinute =
+                pick(s.bandwidthSentLastMinute, m.get("connection_bandwidth_sent_last_minute_total"));
+        s.bandwidthReceivedLastMinute =
+                pick(s.bandwidthReceivedLastMinute, m.get("connection_bandwidth_received_last_minute_total"));
+        s.filetransferBandwidthSent =
+                pick(s.filetransferBandwidthSent, m.get("connection_filetransfer_bandwidth_sent"));
+        s.filetransferBandwidthReceived =
+                pick(s.filetransferBandwidthReceived, m.get("connection_filetransfer_bandwidth_received"));
+
+        applyPerKindFields(s, m);
+    }
+
+    /**
+     * Parses the per-category {@code connection_*_<kind>} fields (as sent in a
+     * {@code notifyconnectioninfo} report) into {@code s}, merging into any
+     * existing rows. Categories absent from the map are left untouched.
+     */
+    private static void applyPerKindFields(ConnectionStats s, Map<String, String> m) {
+        for (ConnectionStats.Kind kind : ConnectionStats.Kind.values()) {
+            String suffix = kind.name().toLowerCase(java.util.Locale.ROOT); // keepalive/control/speech
+            String probe = m.get("connection_packets_sent_" + suffix);
+            String probe2 = m.get("connection_server2client_packetloss_" + suffix);
+            if (probe == null && probe2 == null) continue; // this category not reported
+
+            ConnectionStats.KindStats ks = s.getOrCreateKind(kind);
+            ks.packetsSent = pick(ks.packetsSent, m.get("connection_packets_sent_" + suffix));
+            ks.packetsReceived = pick(ks.packetsReceived, m.get("connection_packets_received_" + suffix));
+            ks.bytesSent = pick(ks.bytesSent, m.get("connection_bytes_sent_" + suffix));
+            ks.bytesReceived = pick(ks.bytesReceived, m.get("connection_bytes_received_" + suffix));
+            ks.bandwidthSentLastSecond =
+                    pick(ks.bandwidthSentLastSecond, m.get("connection_bandwidth_sent_last_second_" + suffix));
+            ks.bandwidthReceivedLastSecond =
+                    pick(ks.bandwidthReceivedLastSecond, m.get("connection_bandwidth_received_last_second_" + suffix));
+            ks.bandwidthSentLastMinute =
+                    pick(ks.bandwidthSentLastMinute, m.get("connection_bandwidth_sent_last_minute_" + suffix));
+            ks.bandwidthReceivedLastMinute =
+                    pick(ks.bandwidthReceivedLastMinute, m.get("connection_bandwidth_received_last_minute_" + suffix));
+            double kloss = parseDouble(m.get("connection_server2client_packetloss_" + suffix));
+            if (kloss >= 0) ks.packetLoss = kloss;
+        }
+    }
+
+    private static long pick(long current, String value) {
+        long v = parseLong(value);
+        return v >= 0 ? v : current;
+    }
+
+    private static ConnectionStats.Kind mapKind(PacketKind kind) {
+        switch (kind) {
+            case KEEPALIVE:
+                return ConnectionStats.Kind.KEEPALIVE;
+            case SPEECH:
+                return ConnectionStats.Kind.SPEECH;
+            default:
+                return ConnectionStats.Kind.CONTROL;
+        }
+    }
+
+    /** Parses a long, returning -1 for null/blank/non-numeric input. */
+    private static long parseLong(String s) {
+        if (s == null || s.isEmpty()) return -1;
+        try {
+            return Long.parseLong(s.trim());
+        } catch (NumberFormatException e) {
+            return -1;
+        }
+    }
+
+    /** Parses a double, returning -1 for null/blank/non-numeric input. */
+    private static double parseDouble(String s) {
+        if (s == null || s.isEmpty()) return -1;
+        try {
+            return Double.parseDouble(s.trim());
+        } catch (NumberFormatException e) {
+            return -1;
+        }
+    }
+
+    /** @return the parsed value, or 0 when it is absent or not a number */
+    private static int safeInt(String value) {
+        try {
+            return value == null ? 0 : Integer.parseInt(value.trim());
+        } catch (NumberFormatException ex) {
+            return 0;
+        }
+    }
+
+    /** Callback + accumulating snapshot for an in-flight {@code getconnectioninfo}. */
+    private static final class PendingConnInfo {
+        final Consumer<ConnectionStats> callback;
+        final ConnectionStats stats;
+
+        PendingConnInfo(Consumer<ConnectionStats> callback, ConnectionStats stats) {
+            this.callback = callback;
+            this.stats = stats;
+        }
+    }
+}

ts3-client/core/src/main/java/com/ts3client/net/Group.java

@@ -9,11 +9,26 @@ public final class Group {
     public final long iconId;
     /** Display order among groups; lower comes first. */
     public final int sortId;
+    /** TS3 group type: 0 = template, 1 = regular, 2 = query (server groups only). */
+    public final int type;
+    /** Power needed to add a member to this group. */
+    public final int neededMemberAddPower;
+    /** Power needed to remove a member from this group. */
+    public final int neededMemberRemovePower;
 
-    public Group(int id, String name, long iconId, int sortId) {
+    public Group(int id, String name, long iconId, int sortId, int type,
+                 int neededMemberAddPower, int neededMemberRemovePower) {
         this.id = id;
         this.name = name;
         this.iconId = iconId;
         this.sortId = sortId;
+        this.type = type;
+        this.neededMemberAddPower = neededMemberAddPower;
+        this.neededMemberRemovePower = neededMemberRemovePower;
+    }
+
+    /** Regular, user-assignable groups exclude templates and query-only groups. */
+    public boolean isRegular() {
+        return type == 1;
     }
 }

ts3-client/core/src/main/java/com/ts3client/net/IconRepository.java

@@ -6,6 +6,7 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.Files;
+import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
@@ -29,6 +30,12 @@ public final class IconRepository {
     /** Icons at or below this id are bundled defaults rather than server uploads. */
     public static final int MAX_BUNDLED_ID = 1000;
 
+    /**
+     * The default group icons shipped with the client, in the order TeamSpeak's own icon
+     * packs list them. These are what the icon chooser offers as "local" icons.
+     */
+    public static final List<Long> BUNDLED_IDS = List.of(100L, 200L, 300L, 500L, 600L);
+
     /** Downloads {@code /icon_<id>} from the connected server's file repository. */
     public interface Fetcher {
         byte[] fetchIcon(long iconId) throws Exception;

ts3-client/core/src/main/java/com/ts3client/net/ServerModel.java

@@ -18,13 +18,29 @@ public final class ServerModel {
     private final Map<Integer, ClientEntry> clients = new LinkedHashMap<>();
     private final Map<Integer, Group> serverGroups = new LinkedHashMap<>();
     private final Map<Integer, Group> channelGroups = new LinkedHashMap<>();
+    /**
+     * Permission id -> name, learned from the server's {@code permissionlist} response.
+     * Entries carry no id of their own: TS3 numbers them by position in the response,
+     * and the empty "group_id_end" separator records marking category boundaries don't
+     * count toward that position, so only {@link #putPermissionName} advances it.
+     */
+    private final Map<Integer, String> permissionNames = new LinkedHashMap<>();
+    private int nextPermissionId;
+    /** Permission id -> the local client's resolved value, from {@code notifyclientneededpermissions}. */
+    private final Map<Integer, Integer> selfPermissionValues = new LinkedHashMap<>();
     private String serverName = "TeamSpeak Server";
+    /** The channel group everyone starts in, e.g. "Guest" — not worth offering to (re)assign. */
+    private int defaultChannelGroupId;
 
     public synchronized void clear() {
         channels.clear();
         clients.clear();
         serverGroups.clear();
         channelGroups.clear();
+        permissionNames.clear();
+        nextPermissionId = 0;
+        selfPermissionValues.clear();
+        defaultChannelGroupId = 0;
     }
 
     // ---- groups ----
@@ -78,6 +94,64 @@ public final class ServerModel {
         return g == null ? null : g.name;
     }
 
+    /** Regular (non-template, non-query) server groups, ordered for display. */
+    public synchronized List<Group> allServerGroups() {
+        return regularGroups(serverGroups);
+    }
+
+    /** Regular (non-template, non-query) channel groups, ordered for display. */
+    public synchronized List<Group> allChannelGroups() {
+        return regularGroups(channelGroups);
+    }
+
+    private static List<Group> regularGroups(Map<Integer, Group> groups) {
+        List<Group> list = new ArrayList<>();
+        for (Group g : groups.values()) {
+            if (g.isRegular()) list.add(g);
+        }
+        list.sort(Comparator.comparingInt((Group g) -> g.sortId).thenComparingInt(g -> g.id));
+        return list;
+    }
+
+    // ---- permissions ----
+
+    /** Records the next named entry of a {@code permissionlist} response; ignores separators. */
+    public synchronized void putPermissionName(String name) {
+        if (name == null || name.isEmpty()) return;
+        permissionNames.put(nextPermissionId, name);
+        nextPermissionId++;
+    }
+
+    public synchronized void putSelfPermissionValue(int permId, int value) {
+        selfPermissionValues.put(permId, value);
+    }
+
+    /**
+     * The local client's resolved value for a named permission (e.g.
+     * {@code "i_group_needed_member_add_power"}), or {@code 0} if it isn't known
+     * yet (the {@code permissionlist} request is still in flight, or the server
+     * never reported a non-default value for it).
+     */
+    /** Whether the server's {@code permissionlist} has arrived, so ids can be named at all. */
+    public synchronized boolean hasPermissionNames() {
+        return !permissionNames.isEmpty();
+    }
+
+    /** The name the server gave permission id {@code id}, or {@code null} if unknown. */
+    public synchronized String permissionName(int id) {
+        return permissionNames.get(id);
+    }
+
+    public synchronized int selfPermissionValue(String name) {
+        for (Map.Entry<Integer, String> entry : permissionNames.entrySet()) {
+            if (entry.getValue().equals(name)) {
+                Integer value = selfPermissionValues.get(entry.getKey());
+                if (value != null) return value;
+            }
+        }
+        return 0;
+    }
+
     public synchronized String getServerName() {
         return serverName;
     }
@@ -86,6 +160,14 @@ public final class ServerModel {
         if (name != null && !name.isEmpty()) this.serverName = name;
     }
 
+    public synchronized int defaultChannelGroupId() {
+        return defaultChannelGroupId;
+    }
+
+    public synchronized void setDefaultChannelGroupId(int id) {
+        this.defaultChannelGroupId = id;
+    }
+
     // ---- channels ----
 
     public synchronized ChannelNode putChannel(int id, String name, int parentId, int order) {
@@ -129,6 +211,41 @@ public final class ServerModel {
         c.order = newOrder;
     }
 
+    /**
+     * The channels sharing a parent with {@code channelId}, in the order they appear in the
+     * tree and excluding the channel itself — what the editor offers as places to sort after.
+     */
+    public synchronized List<ChannelNode> siblingsOf(int channelId) {
+        ChannelNode channel = channels.get(channelId);
+        if (channel == null) return new ArrayList<>();
+        // Ordered with the channel still in place: the order links form a chain, and
+        // pulling a link out of it first would strand everything below.
+        List<ChannelNode> siblings = childrenOf(channel.parentId);
+        siblings.remove(channel);
+        return siblings;
+    }
+
+    /**
+     * The channels directly below {@code parentId} (0 being the top level), in the order
+     * they appear in the tree — what a new channel can be sorted after.
+     */
+    public synchronized List<ChannelNode> childrenOf(int parentId) {
+        List<ChannelNode> children = new ArrayList<>();
+        for (ChannelNode c : channels.values()) {
+            if (c.parentId == parentId) children.add(c);
+        }
+        sortSiblings(children);
+        return children;
+    }
+
+    /** The channel of that exact name directly below {@code parentId}, or {@code null}. */
+    public synchronized ChannelNode findChannelByName(int parentId, String name) {
+        for (ChannelNode c : channels.values()) {
+            if (c.parentId == parentId && c.name.equals(name)) return c;
+        }
+        return null;
+    }
+
     /** The "/"-separated path of a channel from the root, e.g. {@code "Lobby/Games"}. */
     public synchronized String channelPath(int id) {
         ChannelNode c = channels.get(id);

ts3-client/core/src/main/java/com/ts3client/net/filetransfer/FileTransferManager.java

@@ -52,6 +52,8 @@ public final class FileTransferManager {
 
     /** TeamSpeak error id returned by {@code ftgetfilelist} for an empty directory. */
     private static final int ERROR_DATABASE_EMPTY_RESULT = 0x0501;
+    /** How long to wait for the server to finish listing a directory. */
+    private static final long LIST_TIMEOUT_MS = 15_000;
 
     private final LocalTeamspeakClientSocket socket;
     /** Host we are connected to, used when the server reports no dedicated file-transfer host. */
@@ -70,6 +72,14 @@ public final class FileTransferManager {
      * routes back to the waiting transfer thread.
      */
     private final Map<Integer, CompletableFuture<Map<String, String>>> pendingInits = new ConcurrentHashMap<>();
+
+    /**
+     * The {@code ftgetfilelist} in progress. The server answers that command with a
+     * {@code notifyfilelist} event per entry and a closing {@code notifyfilelistfinished}
+     * rather than with rows of the command's own reply, so the entries are collected here
+     * until the listing ends. One listing may be in flight at a time.
+     */
+    private volatile FileListRequest fileListRequest;
     private final TS3Listener ftEventListener = new TS3Listener() {
         @Override
         public void onUnknownEvent(UnknownTeamspeakEvent e) {
@@ -88,34 +98,49 @@ public final class FileTransferManager {
     /**
      * Lists the files and subdirectories directly under {@code path} in the given
      * channel's repository. Returns an empty list for an empty directory.
+     *
+     * <p>Blocks until the server has sent the whole listing, so it must not be called from
+     * the event thread that delivers it.
      */
     public List<RemoteFile> list(int channelId, String channelPassword, String path)
             throws Exception {
+        String directory = path == null || path.isEmpty() ? "/" : path;
         SingleCommand cmd = new SingleCommand("ftgetfilelist", ProtocolRole.CLIENT,
                 new CommandSingleParameter("cid", Integer.toString(channelId)),
                 new CommandSingleParameter("cpw", channelPassword == null ? "" : channelPassword),
-                new CommandSingleParameter("path", path == null || path.isEmpty() ? "/" : path));
+                new CommandSingleParameter("path", directory));
 
-        List<RemoteFile> files = new ArrayList<>();
-        Iterable<SingleCommand> rows;
+        FileListRequest request = new FileListRequest(channelId, directory);
+        fileListRequest = request;
         try {
-            rows = socket.executeCommand(cmd).get();
+            socket.executeCommand(cmd).complete();
+            // The command's reply only acknowledges it; the entries are events, and the
+            // server marks their end with notifyfilelistfinished.
+            request.finished.get(LIST_TIMEOUT_MS, TimeUnit.MILLISECONDS);
         } catch (com.github.manevolent.ts3j.command.CommandException e) {
-            if (e.getErrorId() == ERROR_DATABASE_EMPTY_RESULT) return files;
-            throw e;
+            if (e.getErrorId() != ERROR_DATABASE_EMPTY_RESULT) throw e;
+        } catch (TimeoutException e) {
+            throw new IOException("The server did not finish listing " + directory);
+        } finally {
+            fileListRequest = null;
         }
-        for (SingleCommand row : rows) {
-            Map<String, String> m = row.toMap();
-            String name = m.get("name");
-            if (name == null || name.isEmpty()) continue;
-            files.add(new RemoteFile(
-                    name,
-                    m.getOrDefault("path", path),
-                    parseLong(m.get("size")),
-                    "0".equals(m.get("type")),
-                    parseLong(m.get("datetime"))));
-        }
-        return files;
+        return new ArrayList<>(request.files);
+    }
+
+    /** Collects one {@code notifyfilelist} entry for the listing in flight. */
+    private void collectListEntry(Map<String, String> row) {
+        FileListRequest request = fileListRequest;
+        if (request == null) return;
+        String cid = row.get("cid");
+        if (cid != null && !cid.isEmpty() && parseLong(cid) != request.channelId) return;
+        String name = row.get("name");
+        if (name == null || name.isEmpty()) return;
+        request.files.add(new RemoteFile(
+                name,
+                row.getOrDefault("path", request.path),
+                parseLong(row.get("size")),
+                "0".equals(row.get("type")),
+                parseLong(row.get("datetime"))));
     }
 
     /** Creates a new directory at {@code dirPath} (a full path such as {@code /new}). */
@@ -351,6 +376,15 @@ public final class FileTransferManager {
         String command = e.getCommand();
         if (command == null) return;
         Map<String, String> map = e.getMap();
+        if (command.equals("notifyfilelist")) {
+            collectListEntry(map);
+            return;
+        }
+        if (command.equals("notifyfilelistfinished")) {
+            FileListRequest request = fileListRequest;
+            if (request != null) request.finished.complete(null);
+            return;
+        }
         Integer ftfid = tryParseInt(map.get("clientftfid"));
         if (ftfid == null) return;
         CompletableFuture<Map<String, String>> future = pendingInits.get(ftfid);
@@ -454,4 +488,17 @@ public final class FileTransferManager {
         String m = r.getMessage();
         return m != null ? m : r.getClass().getSimpleName();
     }
+
+    /** One in-flight {@code ftgetfilelist} and the entries received for it so far. */
+    private static final class FileListRequest {
+        final int channelId;
+        final String path;
+        final List<RemoteFile> files = new java.util.concurrent.CopyOnWriteArrayList<>();
+        final CompletableFuture<Void> finished = new CompletableFuture<>();
+
+        FileListRequest(int channelId, String path) {
+            this.channelId = channelId;
+            this.path = path;
+        }
+    }
 }

ts3-client/core/src/main/java/com/ts3client/sound/SoundNotifier.java

@@ -24,6 +24,7 @@ public final class SoundNotifier {
     private volatile SoundPlayer player;
     private volatile SoundPack pack;
     private volatile List<SoundPack> available = List.of();
+    private volatile boolean soundsMuted;
 
     public SoundNotifier(Settings settings) {
         this.settings = settings;
@@ -55,6 +56,19 @@ public final class SoundNotifier {
         settings.soundPack = pack == null ? "" : pack.id();
     }
 
+    /**
+     * Silences every notification sound until turned back on — TS3's "Mute Sounds"
+     * hotkey action. Unlike deafening, this is not tied to a server and even important
+     * actions stay quiet.
+     */
+    public void setMuted(boolean muted) {
+        this.soundsMuted = muted;
+    }
+
+    public boolean isMuted() {
+        return soundsMuted;
+    }
+
     /**
      * Plays the sound for an action.
      *
@@ -70,6 +84,7 @@ public final class SoundNotifier {
      *                  {@code clientname} or {@code channelname}
      */
     public void fire(SoundEvent event, boolean muted, Map<String, String> variables) {
+        if (soundsMuted) return;
         NotificationSettings notifications = settings.notifications;
         if (!notifications.isEnabled(event)) return;
         if (muted && !notifications.isImportant(event)) return;
@@ -98,7 +113,7 @@ public final class SoundNotifier {
         if (script == null) return;
 
         String resolved = script.resolve(withDefaults(variables));
-        double volume = Math.max(0, Math.min(1.0, settings.soundVolume));
+        double volume = Math.max(0, Math.min(1.0, settings.effectiveSoundVolume()));
         if (volume <= 0) return;
 
         if (script.kind() == SoundScript.Kind.SAY) {

ts3-client/core/src/main/java/com/ts3client/text/BBCode.java

@@ -37,6 +37,10 @@ public final class BBCode {
     /** CSS class on links that leave the client, so they are visibly not an identity. */
     public static final String EXTERNAL_LINK_CLASS = "extlink";
 
+    /** A single {@code [url=href]label[/url]} pair, the only markup the log carries. */
+    private static final Pattern URL_LINK =
+            Pattern.compile("(?i)\\[url=([^\\]]+)](.*?)\\[/url]");
+
     private BBCode() {
     }
 
@@ -70,6 +74,29 @@ public final class BBCode {
         return out.toString();
     }
 
+    /**
+     * Renders text carrying {@code [url=…]…[/url]} links and nothing else: everything
+     * outside those tags stays literal. The server log is written this way, so that a
+     * name happening to contain bracket markup is shown as it is rather than rendered.
+     */
+    public static String linksToHtml(String input) {
+        if (input == null || input.isEmpty()) return "";
+        StringBuilder out = new StringBuilder();
+        Matcher m = URL_LINK.matcher(input);
+        int last = 0;
+        while (m.find()) {
+            out.append(escape(input.substring(last, m.start())));
+            String href = m.group(1);
+            if (SAFE_URL.matcher(href).matches()) {
+                out.append(link(href)).append(escape(m.group(2))).append(linkClose(href));
+            } else {
+                out.append(escape(m.group()));
+            }
+            last = m.end();
+        }
+        return out.append(escape(input.substring(last))).toString();
+    }
+
     /** Escapes plain text for HTML without interpreting any BBCode. */
     public static String escape(String s) {
         if (s == null) return "";

ts3-client/core/src/test/java/com/ts3client/audio/vad/RealFftTest.java

@@ -0,0 +1,58 @@
+package com.ts3client.audio.vad;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Random;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class RealFftTest {
+
+    /**
+     * The rnn_vad transform length is 480 = 2^5 * 3 * 5, so the mixed-radix path has to be
+     * right for factors other than powers of two.
+     */
+    @Test
+    void matchesDirectDftForMixedRadixLengths() {
+        for (int n : new int[]{480, 240, 512, 64, 60, 210, 100}) {
+            RealFft fft = new RealFft(n);
+            Random random = new Random(n);
+            float[] in = new float[n];
+            float[] out = new float[n];
+            for (int i = 0; i < n; i++) {
+                in[i] = (float) random.nextGaussian();
+            }
+            fft.forward(in, out);
+
+            for (int k = 0; k <= n / 2; k++) {
+                double re = 0;
+                double im = 0;
+                for (int t = 0; t < n; t++) {
+                    double angle = -2 * Math.PI * k * t / n;
+                    re += in[t] * Math.cos(angle);
+                    im += in[t] * Math.sin(angle);
+                }
+                double gotRe;
+                double gotIm;
+                if (k == 0) {
+                    gotRe = out[0];
+                    gotIm = 0;
+                } else if (k == n / 2) {
+                    gotRe = out[1]; // Packed layout keeps Nyquist in slot 1.
+                    gotIm = 0;
+                } else {
+                    gotRe = out[2 * k];
+                    gotIm = out[2 * k + 1];
+                }
+                assertEquals(re, gotRe, 1e-2, "n=" + n + " bin=" + k + " real");
+                assertEquals(im, gotIm, 1e-2, "n=" + n + " bin=" + k + " imag");
+            }
+        }
+    }
+
+    @Test
+    void rejectsOddLengths() {
+        org.junit.jupiter.api.Assertions.assertThrows(
+                IllegalArgumentException.class, () -> new RealFft(481));
+    }
+}

ts3-client/core/src/test/java/com/ts3client/audio/vad/RnnVadTest.java

@@ -0,0 +1,129 @@
+package com.ts3client.audio.vad;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Random;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * Behavioural checks on the {@code rnn_vad} port. The network weights are the ones the TS3
+ * client links, so these also pin the detector's agreement with it.
+ */
+class RnnVadTest {
+
+    private static final int FRAMES = 60;
+
+    @Test
+    void silenceScoresZero() {
+        float[] x = new float[RnnVad.FRAME_SIZE * FRAMES];
+        double[] probabilities = run(x);
+        for (double p : probabilities) {
+            assertEquals(0.0, p, 0.0, "silence must not score above zero");
+        }
+    }
+
+    @Test
+    void voicedSpeechLikeSignalScoresHigh() {
+        float[] x = synth(FRAMES, t -> {
+            double sum = 0;
+            for (int h = 1; h <= 30 && 120 * h < 8000; h++) {
+                double f = 120 * h;
+                double gain = formant(f, 700, 90) + formant(f, 1220, 110) + formant(f, 2600, 160);
+                sum += gain * Math.sin(2 * Math.PI * f * t + h);
+            }
+            // A slow tremolo keeps it from looking like a stationary tone.
+            return 0.25 * (0.6 + 0.4 * Math.sin(2 * Math.PI * 5 * t)) * sum / 6.0;
+        });
+        // Skip the first frames: the pitch buffer and GRU need history.
+        assertTrue(meanFrom(run(x), 20) > 0.8, "a voiced signal should score high");
+    }
+
+    @Test
+    void quietPinkNoiseScoresLow() {
+        Random random = new Random(3);
+        float[] x = new float[RnnVad.FRAME_SIZE * FRAMES];
+        double b0 = 0;
+        double b1 = 0;
+        double b2 = 0;
+        for (int i = 0; i < x.length; i++) {
+            double w = random.nextGaussian();
+            b0 = 0.99765 * b0 + w * 0.0990460;
+            b1 = 0.96300 * b1 + w * 0.2965164;
+            b2 = 0.57000 * b2 + w * 1.0526913;
+            // About -45 dBFS: representative of room tone rather than loud hiss.
+            x[i] = (float) ((b0 + b1 + b2 + w * 0.1848) * 0.0011);
+        }
+        assertTrue(meanFrom(run(x), 20) < 0.2, "quiet room tone should not read as speech");
+    }
+
+    @Test
+    void estimatesPitchPeriodExactly() {
+        // The pitch feature is fed to the network as 0.01 * (period48k - 300).
+        for (double f0 : new double[]{80, 100, 120, 150, 200, 250, 300, 400}) {
+            RnnVad vad = new RnnVad();
+            float[] x = synth(FRAMES, t -> {
+                double sum = 0;
+                for (int h = 1; h <= 40 && f0 * h < 11000; h++) {
+                    sum += Math.sin(2 * Math.PI * f0 * h * t) / h;
+                }
+                return 0.2 * sum;
+            });
+            for (int f = 0; f < FRAMES; f++) {
+                vad.process(x, f * RnnVad.FRAME_SIZE);
+            }
+            assertEquals(48000 / f0, vad.pitchPeriod48kHz(), 1e-9,
+                    "pitch period for f0=" + f0);
+        }
+    }
+
+    @Test
+    void resetClearsState() {
+        float[] x = synth(FRAMES, t -> 0.3 * Math.sin(2 * Math.PI * 200 * t));
+        RnnVad vad = new RnnVad();
+        for (int f = 0; f < FRAMES; f++) {
+            vad.process(x, f * RnnVad.FRAME_SIZE);
+        }
+        assertTrue(vad.probability() > 0.0);
+        vad.reset();
+        assertEquals(0.0, vad.probability(), 0.0);
+    }
+
+    // ---- helpers ----
+
+    private interface Signal {
+        double at(double t);
+    }
+
+    private static double formant(double f, double centre, double bandwidth) {
+        double d = (f - centre) / bandwidth;
+        return 1.0 / (1.0 + d * d);
+    }
+
+    private static float[] synth(int frames, Signal signal) {
+        float[] x = new float[RnnVad.FRAME_SIZE * frames];
+        for (int i = 0; i < x.length; i++) {
+            x[i] = (float) signal.at((double) i / RnnVad.SAMPLE_RATE);
+        }
+        return x;
+    }
+
+    private static double[] run(float[] x) {
+        RnnVad vad = new RnnVad();
+        int frames = x.length / RnnVad.FRAME_SIZE;
+        double[] probabilities = new double[frames];
+        for (int i = 0; i < frames; i++) {
+            probabilities[i] = vad.process(x, i * RnnVad.FRAME_SIZE);
+        }
+        return probabilities;
+    }
+
+    private static double meanFrom(double[] values, int start) {
+        double sum = 0;
+        for (int i = start; i < values.length; i++) {
+            sum += values[i];
+        }
+        return sum / (values.length - start);
+    }
+}

ts3-client/core/src/test/java/com/ts3client/hotkey/HotkeyEngineTest.java

@@ -0,0 +1,120 @@
+package com.ts3client.hotkey;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class HotkeyEngineTest {
+
+    private static final HotkeyKey CTRL = HotkeyKey.keyboard(37);
+    private static final HotkeyKey K = HotkeyKey.keyboard(45);
+    private static final HotkeyKey MOUSE4 = HotkeyKey.mouse(8);
+
+    private final List<String> fired = new ArrayList<>();
+    private final Hotkeys hotkeys = new Hotkeys();
+    private final HotkeyEngine engine = new HotkeyEngine(hotkeys,
+            (hotkey, active) -> fired.add(hotkey.action + (active ? ":on" : ":off")));
+
+    private Hotkey bind(HotkeyAction action, Hotkey.Trigger trigger, HotkeyKey... keys) {
+        Hotkey h = new Hotkey(action, new HotkeyCombo(List.of(keys)));
+        h.trigger = trigger;
+        hotkeys.add(h);
+        return h;
+    }
+
+    @Test
+    void firesOnKeyDownOnlyWhenEveryKeyIsHeld() {
+        bind(HotkeyAction.MIC_TOGGLE, Hotkey.Trigger.KEY_DOWN, CTRL, K);
+
+        engine.onInput(K, true);
+        assertTrue(fired.isEmpty(), "one key of the combination is not enough");
+        engine.onInput(CTRL, true);
+        assertEquals(List.of("MIC_TOGGLE:on"), fired);
+
+        // Releasing and re-pressing arms it again, but only once per completion.
+        engine.onInput(CTRL, false);
+        engine.onInput(CTRL, true);
+        assertEquals(List.of("MIC_TOGGLE:on", "MIC_TOGGLE:on"), fired);
+    }
+
+    @Test
+    void keyUpTriggerFiresOnRelease() {
+        bind(HotkeyAction.SPEAKER_TOGGLE, Hotkey.Trigger.KEY_UP, MOUSE4);
+
+        engine.onInput(MOUSE4, true);
+        assertTrue(fired.isEmpty());
+        engine.onInput(MOUSE4, false);
+        assertEquals(List.of("SPEAKER_TOGGLE:on"), fired);
+    }
+
+    @Test
+    void momentaryActionReportsPressAndRelease() {
+        bind(HotkeyAction.PTT_ACTIVATE, Hotkey.Trigger.KEY_UP, MOUSE4);
+
+        engine.onInput(MOUSE4, true);
+        engine.onInput(MOUSE4, false);
+        // The trigger setting does not apply: push-to-talk always spans the hold.
+        assertEquals(List.of("PTT_ACTIVATE:on", "PTT_ACTIVATE:off"), fired);
+    }
+
+    @Test
+    void disabledAndUnsupportedBindingsStaySilent() {
+        bind(HotkeyAction.MIC_TOGGLE, Hotkey.Trigger.KEY_DOWN, K).enabled = false;
+        bind(HotkeyAction.RECORDING_START, Hotkey.Trigger.KEY_DOWN, MOUSE4);
+
+        engine.onInput(K, true);
+        engine.onInput(MOUSE4, true);
+        assertTrue(fired.isEmpty());
+    }
+
+    @Test
+    void recordingCapturesTheCombinationInsteadOfFiring() {
+        bind(HotkeyAction.MIC_TOGGLE, Hotkey.Trigger.KEY_DOWN, K);
+        List<HotkeyCombo> recorded = new ArrayList<>();
+        engine.record(new HotkeyEngine.Recorder() {
+            @Override
+            public void onRecording(HotkeyCombo combo) {
+            }
+
+            @Override
+            public void onRecorded(HotkeyCombo combo) {
+                recorded.add(combo);
+            }
+        });
+
+        engine.onInput(CTRL, true);
+        engine.onInput(K, true);
+        engine.onInput(K, false);
+        engine.onInput(CTRL, false);
+
+        assertTrue(fired.isEmpty(), "bindings must not fire while recording");
+        assertEquals(1, recorded.size());
+        assertEquals(List.of(CTRL, K), recorded.get(0).keys());
+    }
+
+    @Test
+    void actionsCarryTeamSpeaksTreeGrouping() {
+        assertEquals("Sounds", HotkeyAction.SOUNDPACK_ACTIVATE.group());
+        assertEquals("Microphone", HotkeyAction.MIC_TOGGLE.group());
+        // TS3 leaves a handful of actions ungrouped, listed straight under their category.
+        assertEquals("", HotkeyAction.NICKNAME_CHANGE.group());
+        assertEquals("", HotkeyAction.BRING_TO_FRONT.group());
+
+        Hotkey pack = new Hotkey(HotkeyAction.SOUNDPACK_ACTIVATE, new HotkeyCombo(List.of(K)));
+        pack.argument = "Default Sound Pack (Male)";
+        assertEquals("Sounds / Activate Soundpack / Default Sound Pack (Male)", pack.path());
+        assertEquals("Bring Client to Front",
+                new Hotkey(HotkeyAction.BRING_TO_FRONT, new HotkeyCombo(List.of(K))).path());
+    }
+
+    @Test
+    void combinationsSurviveARoundTripThroughText() {
+        HotkeyCombo combo = new HotkeyCombo(List.of(CTRL, MOUSE4));
+        assertEquals("Keyboard:37+Mouse:8", combo.toString());
+        assertEquals(combo, HotkeyCombo.parse(combo.toString()));
+    }
+}

ts3-client/core/src/test/java/com/ts3client/net/EventFieldsTest.java

@@ -9,7 +9,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 
 /**
- * Pins the ts3j behaviour {@code TeamspeakConnection.has(...)} exists for: a field
+ * Pins the ts3j behaviour {@code ConnectionEventHandler.has(...)} exists for: a field
  * the event never carried reads back as an empty string, so a null check would treat
  * every partial update (someone muting, say) as if it reported every other field too.
  */

ts3-client/core/src/test/java/com/ts3client/text/BBCodeLinksTest.java

@@ -0,0 +1,40 @@
+package com.ts3client.text;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * The server log's renderer: it turns the client's own links into anchors and leaves
+ * everything else — names carrying bracket markup included — as plain text.
+ */
+class BBCodeLinksTest {
+
+    @Test
+    void rendersClientAndChannelLinks() {
+        String log = TsLink.clientBBCode(7, "uid=", "Bob") + " connected to channel \""
+                + TsLink.channelBBCode(3, "Lobby") + "\"";
+        String html = BBCode.linksToHtml(log);
+        assertTrue(html.contains("href=\"client://7/uid=~Bob\""), html);
+        assertTrue(html.contains(">Bob</a>"), html);
+        assertTrue(html.contains("href=\"channel://3/Lobby\""), html);
+        assertTrue(html.contains(">Lobby</a>"), html);
+    }
+
+    @Test
+    void leavesOtherMarkupLiteral() {
+        assertEquals("[b]not bold[/b] &amp; &lt;i&gt;", BBCode.linksToHtml("[b]not bold[/b] & <i>"));
+    }
+
+    @Test
+    void keepsBracketsInsideALabelLiteral() {
+        String html = BBCode.linksToHtml(TsLink.channelBBCode(3, "[cspacer]---"));
+        assertTrue(html.contains(">[cspacer]---</a>"), html);
+    }
+
+    @Test
+    void rejectsHrefsThatAreNotLinks() {
+        assertEquals("[url=javascript:alert(1)]x[/url]", BBCode.linksToHtml("[url=javascript:alert(1)]x[/url]"));
+    }
+}

ts3-client/desktop/src/main/java/com/ts3client/audio/desktop/DesktopVoiceInput.java

@@ -2,9 +2,12 @@ package com.ts3client.audio.desktop;
 
 import com.github.manevolent.ts3j.enums.CodecType;
 import com.ts3client.audio.AudioEnhancer;
+import com.ts3client.audio.AudioFrameListener;
+import com.ts3client.audio.InputLevel;
 import com.ts3client.audio.OpusParameters;
-import com.ts3client.audio.SpeechDetector;
+import com.ts3client.audio.SpeechProbabilityDetector;
 import com.ts3client.audio.VoiceInput;
+import com.ts3client.audio.vad.RnnSpeechDetector;
 import com.ts3client.config.Settings;
 
 import java.util.concurrent.ConcurrentLinkedQueue;
@@ -28,10 +31,27 @@ import java.util.function.Consumer;
  */
 public final class DesktopVoiceInput implements VoiceInput {
 
-    private static final int HANGOVER_FRAMES = 15; // ~300 ms of tail after level drops
+    /**
+     * How long the gate stays open after the last active frame. TS3 counts 64 of its
+     * 10 ms preprocessor frames before closing, so the tail of a word is never clipped.
+     */
+    private static final int HANGOVER_MS = 640;
+
+    /**
+     * Audio replayed when the gate opens, so a word's onset is not swallowed by the frame
+     * that detected it. TS3 keeps up to three 10 ms buffers ({@code vad_extrabuffersize}
+     * defaults to 2, plus one).
+     */
+    private static final int PREROLL_MS = 30;
+
+    private static final int HANGOVER_FRAMES =
+            Math.max(1, HANGOVER_MS * AudioDevices.SAMPLE_RATE / 1000 / AudioDevices.FRAME_SIZE);
+    private static final int PREROLL_FRAMES =
+            Math.max(1, PREROLL_MS * AudioDevices.SAMPLE_RATE / 1000 / AudioDevices.FRAME_SIZE);
 
     private final ConcurrentLinkedQueue<byte[]> queue = new ConcurrentLinkedQueue<>();
     private final AtomicBoolean muted = new AtomicBoolean(false);
+    private final AtomicBoolean localMuted = new AtomicBoolean(false);
     private final AtomicBoolean transmitting = new AtomicBoolean(false);
     private final AtomicBoolean pttDown = new AtomicBoolean(false);
     private final AtomicBoolean running = new AtomicBoolean(false);
@@ -44,12 +64,14 @@ public final class DesktopVoiceInput implements VoiceInput {
     private volatile double inputGain;
     private volatile CodecType codec = CodecType.OPUS_VOICE;
 
-    private final SpeechDetector speechDetector = new SpeechDetector(AudioDevices.SAMPLE_RATE);
+    private final SpeechProbabilityDetector speechDetector =
+            new RnnSpeechDetector(AudioDevices.SAMPLE_RATE);
     private final AudioEnhancer enhancer = new AudioEnhancer(AudioDevices.SAMPLE_RATE);
 
-    private volatile Consumer<Double> levelListener;   // input level in dBFS
+    private volatile Consumer<Double> levelListener;   // input level, InputLevel scale
     private volatile Consumer<Boolean> talkListener;   // local talk-state changes
     private volatile Runnable mutedTalkListener;       // speech detected while muted
+    private volatile AudioFrameListener monitorListener; // local monitoring of what is sent
     private boolean mutedTalking;
 
     private final String deviceName;
@@ -68,6 +90,11 @@ public final class DesktopVoiceInput implements VoiceInput {
     private int hangover;
     private boolean lastTransmitting;
 
+    // Ring of recent frames captured while the gate was shut.
+    private final float[][] preroll = new float[PREROLL_FRAMES][];
+    private int prerollTail;
+    private int prerollCount;
+
     public DesktopVoiceInput(Settings settings) {
         this.deviceName = settings.inputDevice;
         this.mode = settings.inputMode;
@@ -195,6 +222,11 @@ public final class DesktopVoiceInput implements VoiceInput {
         this.talkListener = l;
     }
 
+    @Override
+    public void setMonitorListener(AudioFrameListener l) {
+        this.monitorListener = l;
+    }
+
     @Override
     public void setMutedTalkListener(Runnable l) {
         this.mutedTalkListener = l;
@@ -208,6 +240,16 @@ public final class DesktopVoiceInput implements VoiceInput {
         this.muted.set(m);
     }
 
+    @Override
+    public void setLocalMuted(boolean m) {
+        this.localMuted.set(m);
+    }
+
+    @Override
+    public boolean isLocalMuted() {
+        return localMuted.get();
+    }
+
     // ---- lifecycle ----
 
     public synchronized void start() {
@@ -305,36 +347,76 @@ public final class DesktopVoiceInput implements VoiceInput {
                 // stream bypasses them and is transmitted as captured.
                 if (!stereo) enhancer.process(mono, frameSamples);
 
-                double sumSq = 0;
-                for (int i = 0; i < frameSamples; i++) {
-                    sumSq += (double) mono[i] * mono[i];
-                }
-                double rms = Math.sqrt(sumSq / frameSamples);
-                double db = (rms <= 1e-9) ? -100.0 : 20.0 * Math.log10(rms);
+                double db = InputLevel.toDb(mono, frameSamples);
                 Consumer<Double> ll = levelListener;
                 if (ll != null) ll.accept(db);
 
+                boolean wasOpen = transmitting.get();
                 boolean open = decideGate(db, mono);
                 setTransmitting(open);
 
                 if (open && !muted.get() && encoder != null) {
                     try {
-                        packet = encoder.encode(stereo ? pcm : mono);
+                        // On the opening edge, send the buffered lead-in first so the
+                        // word's onset isn't lost to the frame that detected it.
+                        if (!wasOpen) {
+                            flushPreroll(stereo);
+                        }
+                        float[] sent = stereo ? pcm : mono;
+                        packet = encoder.encode(sent);
+                        monitor(sent, stereo ? encoderChannels : 1);
                     } catch (Exception ignored) {
                     }
                 }
+                if (!open) {
+                    rememberForPreroll(stereo ? pcm : mono);
+                }
             }
 
             if (packet != null && packet.length > 0) {
-                queue.offer(packet);
-                // Guard against unbounded growth if the network stalls.
-                while (queue.size() > 10) queue.poll();
+                offer(packet);
             }
         }
     }
 
+    private void offer(byte[] packet) {
+        queue.offer(packet);
+        // Guard against unbounded growth if the network stalls.
+        while (queue.size() > 10) queue.poll();
+    }
+
+    /** Keeps the most recent frames while the gate is shut, for {@link #flushPreroll}. */
+    private void rememberForPreroll(float[] frame) {
+        float[] slot = preroll[prerollTail];
+        if (slot == null || slot.length != frame.length) {
+            slot = new float[frame.length];
+            preroll[prerollTail] = slot;
+        }
+        System.arraycopy(frame, 0, slot, 0, frame.length);
+        prerollTail = (prerollTail + 1) % PREROLL_FRAMES;
+        if (prerollCount < PREROLL_FRAMES) prerollCount++;
+    }
+
+    /** Encodes and queues the buffered lead-in, oldest first. Call under {@link #encoderLock}. */
+    private void flushPreroll(boolean stereo) {
+        int expected = stereo ? AudioDevices.FRAME_SIZE * encoderChannels : AudioDevices.FRAME_SIZE;
+        for (int i = 0; i < prerollCount; i++) {
+            int idx = (prerollTail - prerollCount + i + PREROLL_FRAMES) % PREROLL_FRAMES;
+            float[] frame = preroll[idx];
+            // A channel-count change between capture and flush invalidates the buffer.
+            if (frame == null || frame.length != expected) continue;
+            try {
+                byte[] p = encoder.encode(frame);
+                if (p != null && p.length > 0) offer(p);
+                monitor(frame, stereo ? encoderChannels : 1);
+            } catch (Exception ignored) {
+            }
+        }
+        prerollCount = 0;
+    }
+
     private boolean decideGate(double db, float[] pcm) {
-        if (muted.get()) {
+        if (muted.get() || localMuted.get()) {
             hangover = 0;
             detectMutedSpeech(db);
             return false;
@@ -353,8 +435,10 @@ public final class DesktopVoiceInput implements VoiceInput {
     }
 
     /**
-     * Applies the selected VAD mode (volume gate, speech probability, or both) with
-     * a deactivation-delay hangover so trailing syllables aren't clipped.
+     * Applies the selected VAD mode with a hangover so trailing syllables aren't clipped.
+     *
+     * <p>The modes match the TS3 client's: the volume gate alone, the speech detector
+     * alone, or both together. Volume Gate skips the detector entirely, as TS3 does.
      */
     private boolean voiceActivated(double db, float[] pcm) {
         boolean detected;
@@ -363,11 +447,11 @@ public final class DesktopVoiceInput implements VoiceInput {
                 detected = db >= thresholdDb;
                 break;
             case AUTOMATIC:
-                detected = speechDetector.process(pcm) >= speechThreshold;
+                detected = speechDetector.process(pcm, AudioDevices.FRAME_SIZE) >= speechThreshold;
                 break;
             case HYBRID:
             default:
-                double probability = speechDetector.process(pcm);
+                double probability = speechDetector.process(pcm, AudioDevices.FRAME_SIZE);
                 detected = db >= thresholdDb && probability >= speechThreshold;
                 break;
         }
@@ -395,6 +479,12 @@ public final class DesktopVoiceInput implements VoiceInput {
         mutedTalking = talking;
     }
 
+    /** Hands a transmitted frame to the monitor, if one is attached. */
+    private void monitor(float[] frame, int channels) {
+        AudioFrameListener l = monitorListener;
+        if (l != null) l.onFrame(frame, channels);
+    }
+
     private void setTransmitting(boolean t) {
         transmitting.set(t);
         if (t != lastTransmitting) {

ts3-client/desktop/src/main/java/com/ts3client/audio/desktop/DesktopVoiceOutput.java

@@ -10,6 +10,8 @@ import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
 import java.util.function.BiConsumer;
 
 /**
@@ -24,6 +26,16 @@ public final class DesktopVoiceOutput implements VoiceOutput {
     /** Longest Opus frame (120 ms @ 48 kHz) a packet may decode to, per channel. */
     private static final int MAX_FRAME = 5760;
 
+    /**
+     * A speaker is only meant to stop when the empty voice packet marking the end of a
+     * talk burst arrives — but that packet is UDP too, and a lost one otherwise leaves
+     * the talking indicator stuck until the speaker's next burst. Opus frames are 20 ms
+     * apart while someone is actually talking, so a gap several times that long, with no
+     * packet of either kind, is unambiguous: force the indicator off rather than trust
+     * the one packet that could go missing.
+     */
+    private static final long TALK_TIMEOUT_NANOS = TimeUnit.MILLISECONDS.toNanos(200);
+
     /** One speaker's decode + playback pipeline. */
     private final class ClientStream {
         final int clientId;
@@ -81,8 +93,32 @@ public final class DesktopVoiceOutput implements VoiceOutput {
     /** Notified (clientId, talking) on the EDT-agnostic worker thread when a speaker starts/stops. */
     private volatile BiConsumer<Integer, Boolean> talkListener;
 
+    /** Catches a talk burst whose end packet never arrived; see {@link #TALK_TIMEOUT_NANOS}. */
+    private final ScheduledExecutorService watchdog = Executors.newSingleThreadScheduledExecutor(r -> {
+        Thread t = new Thread(r, "ts3j-talk-watchdog");
+        t.setDaemon(true);
+        return t;
+    });
+
     public DesktopVoiceOutput(String outputDevice) {
         this.outputDevice = outputDevice;
+        watchdog.scheduleWithFixedDelay(this::checkTalkTimeouts, 50, 50, TimeUnit.MILLISECONDS);
+    }
+
+    private void checkTalkTimeouts() {
+        long now = System.nanoTime();
+        for (ClientStream s : streams.values()) {
+            if (s.talking && now - s.lastPacketNanos > TALK_TIMEOUT_NANOS) {
+                s.worker.submit(() -> {
+                    try {
+                        s.line.drain();
+                    } catch (Exception ignored) {
+                    }
+                    if (s.decoder != null) s.decoder.reset();
+                    markTalking(s, false);
+                });
+            }
+        }
     }
 
     public void setTalkListener(BiConsumer<Integer, Boolean> l) {
@@ -226,6 +262,7 @@ public final class DesktopVoiceOutput implements VoiceOutput {
     }
 
     public void shutdown() {
+        watchdog.shutdownNow();
         for (ClientStream s : streams.values()) {
             s.close();
         }

ts3-client/desktop/src/main/java/com/ts3client/hotkey/desktop/DesktopInputHooks.java

@@ -0,0 +1,102 @@
+package com.ts3client.hotkey.desktop;
+
+import com.ts3client.hotkey.GlobalInputHook;
+import com.ts3client.hotkey.HotkeyKey;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Picks the global input hook that suits the running session and starts it.
+ *
+ * <p>Windows has one answer, raw input. On X11 it is XInput2, with RECORD behind it for
+ * servers that lack it: neither needs privileges or devices to open. On Wayland the X
+ * server sees only what the compositor forwards, so reading evdev is the surest way to
+ * catch every key — and when that is not permitted either, the returned hook is simply
+ * not running and says why.
+ */
+public final class DesktopInputHooks {
+
+    private DesktopInputHooks() {
+    }
+
+    /** @return a hook, started when it could be; check {@link GlobalInputHook#isRunning()} */
+    public static GlobalInputHook start(GlobalInputHook.Listener listener) {
+        List<String> reasons = new ArrayList<>();
+        for (GlobalInputHook hook : candidates()) {
+            hook.start(listener);
+            if (hook.isRunning()) return hook;
+            reasons.add(hook.getClass().getSimpleName() + ": " + hook.unavailableReason());
+            hook.close();
+        }
+        return new Unavailable(reasons.isEmpty()
+                ? "no global input backend for this session"
+                : String.join("; ", reasons));
+    }
+
+    private static List<GlobalInputHook> candidates() {
+        List<GlobalInputHook> hooks = new ArrayList<>();
+        if (Win32.isWindows()) {
+            if (WindowsInputHook.isSupported()) hooks.add(new WindowsInputHook());
+            return hooks;
+        }
+        if (isWayland()) {
+            // Evdev first: it is the only backend guaranteed to see keys aimed at native
+            // Wayland windows. Failing that, Xwayland still covers every X11 app, and on
+            // compositors that forward the rest — KWin, with legacy X11 app support on —
+            // it covers those too.
+            if (EvdevInputHook.isSupported()) hooks.add(new EvdevInputHook());
+            addX11Hooks(hooks);
+        } else {
+            addX11Hooks(hooks);
+            if (EvdevInputHook.isSupported()) hooks.add(new EvdevInputHook());
+        }
+        return hooks;
+    }
+
+    /**
+     * RECORD before XInput2: on at least some driver stacks, XInput2's raw
+     * {@code XI_RawButtonRelease} never reaches a client that hasn't grabbed the pointer —
+     * see {@link XInput2InputHook} — which makes a bound mouse button look stuck down.
+     * RECORD taps the same core events {@code xev} sees and is not affected. XInput2 stays
+     * as the fallback for servers where RECORD is disabled or missing.
+     */
+    private static void addX11Hooks(List<GlobalInputHook> hooks) {
+        if (XRecordInputHook.isSupported()) hooks.add(new XRecordInputHook());
+        if (XInput2InputHook.isSupported()) hooks.add(new XInput2InputHook());
+    }
+
+    private static boolean isWayland() {
+        return System.getenv("WAYLAND_DISPLAY") != null
+                || "wayland".equalsIgnoreCase(System.getenv("XDG_SESSION_TYPE"));
+    }
+
+    /** Stands in when no backend could start, so callers need no null checks. */
+    private record Unavailable(String reason) implements GlobalInputHook {
+
+        @Override
+        public void start(Listener listener) {
+        }
+
+        @Override
+        public boolean isRunning() {
+            return false;
+        }
+
+        @Override
+        public String unavailableReason() {
+            return reason;
+        }
+
+        @Override
+        public String keyName(HotkeyKey key) {
+            // Bindings recorded earlier still deserve their real names in the dialog,
+            // even with no hook running to have produced them.
+            return Win32.isWindows() ? WindowsKeyNamer.name(key) : X11KeyNamer.name(key);
+        }
+
+        @Override
+        public void close() {
+        }
+    }
+}

ts3-client/desktop/src/main/java/com/ts3client/hotkey/desktop/EvdevInputHook.java

@@ -0,0 +1,151 @@
+package com.ts3client.hotkey.desktop;
+
+import com.ts3client.hotkey.GlobalInputHook;
+import com.ts3client.hotkey.HotkeyKey;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * System-wide input hook that reads the kernel's evdev devices directly, for sessions
+ * where {@link XRecordInputHook} cannot see everything — Wayland above all, where the X
+ * server is only told about events aimed at X clients.
+ *
+ * <p>It needs read access to {@code /dev/input/event*}, which normally means membership
+ * of the {@code input} group; without it the hook reports itself unavailable and the
+ * client carries on without global hotkeys.
+ *
+ * <p>Key codes are reported as X keycodes (the kernel code plus 8) and buttons as X
+ * button numbers, so bindings mean the same thing whichever backend recorded them.
+ */
+public final class EvdevInputHook implements GlobalInputHook {
+
+    private static final File INPUT_DIR = new File("/dev/input");
+    /** {@code struct input_event} on 64-bit Linux: two 8-byte time fields, then type/code/value. */
+    private static final int EVENT_SIZE = 24;
+    private static final int EV_KEY = 1;
+    /** Kernel key codes below this are keyboard keys; from here up they are BTN_* buttons. */
+    private static final int BTN_MISC = 0x100;
+    private static final int BTN_LEFT = 0x110;
+
+    private final List<InputStream> streams = new ArrayList<>();
+    private final List<Thread> threads = new ArrayList<>();
+    private volatile Listener listener;
+    private volatile boolean running;
+    private volatile String unavailable = "not started";
+
+    public static boolean isSupported() {
+        File[] devices = INPUT_DIR.listFiles((dir, name) -> name.startsWith("event"));
+        if (devices == null) return false;
+        for (File device : devices) {
+            if (device.canRead()) return true;
+        }
+        return false;
+    }
+
+    @Override
+    public void start(Listener listener) {
+        this.listener = listener;
+        File[] devices = INPUT_DIR.listFiles((dir, name) -> name.startsWith("event"));
+        if (devices == null || devices.length == 0) {
+            unavailable = "no /dev/input devices";
+            return;
+        }
+        for (File device : devices) {
+            try {
+                InputStream in = new FileInputStream(device);
+                streams.add(in);
+                Thread t = new Thread(() -> read(in), "ts3j-hotkeys-evdev-" + device.getName());
+                t.setDaemon(true);
+                threads.add(t);
+            } catch (Exception ignored) {
+                // Devices we may not read are simply skipped.
+            }
+        }
+        if (streams.isEmpty()) {
+            unavailable = "no readable /dev/input device — add your user to the \"input\" group";
+            return;
+        }
+        running = true;
+        unavailable = "";
+        for (Thread t : threads) t.start();
+    }
+
+    private void read(InputStream in) {
+        byte[] buffer = new byte[EVENT_SIZE * 16];
+        ByteBuffer view = ByteBuffer.wrap(buffer).order(ByteOrder.nativeOrder());
+        while (running) {
+            try {
+                int read = in.read(buffer);
+                if (read < 0) return;
+                for (int offset = 0; offset + EVENT_SIZE <= read; offset += EVENT_SIZE) {
+                    int type = view.getShort(offset + 16) & 0xffff;
+                    int code = view.getShort(offset + 18) & 0xffff;
+                    int value = view.getInt(offset + 20);
+                    // 2 is auto-repeat, which must not look like a fresh press.
+                    if (type == EV_KEY && value != 2) dispatch(code, value == 1);
+                }
+            } catch (Exception e) {
+                return;
+            }
+        }
+    }
+
+    private void dispatch(int code, boolean pressed) {
+        Listener l = listener;
+        if (l == null) return;
+        HotkeyKey key = code < BTN_MISC ? HotkeyKey.keyboard(code + 8) : mouse(code);
+        if (key != null) l.onInput(key, pressed);
+    }
+
+    /** Maps the kernel's BTN_* codes onto the X button numbering. */
+    private static HotkeyKey mouse(int code) {
+        return switch (code) {
+            case BTN_LEFT -> HotkeyKey.mouse(1);
+            case BTN_LEFT + 1 -> HotkeyKey.mouse(3);      // BTN_RIGHT
+            case BTN_LEFT + 2 -> HotkeyKey.mouse(2);      // BTN_MIDDLE
+            case BTN_LEFT + 3 -> HotkeyKey.mouse(8);      // BTN_SIDE, "mouse 4"
+            case BTN_LEFT + 4 -> HotkeyKey.mouse(9);      // BTN_EXTRA, "mouse 5"
+            case BTN_LEFT + 5 -> HotkeyKey.mouse(10);     // BTN_FORWARD
+            case BTN_LEFT + 6 -> HotkeyKey.mouse(11);     // BTN_BACK
+            case BTN_LEFT + 7 -> HotkeyKey.mouse(12);     // BTN_TASK
+            default -> null;                              // joysticks, lid switches, …
+        };
+    }
+
+    @Override
+    public boolean isRunning() {
+        return running;
+    }
+
+    @Override
+    public String unavailableReason() {
+        return running ? "" : unavailable;
+    }
+
+    @Override
+    public String keyName(HotkeyKey key) {
+        // The kernel knows scancodes, not layouts; let X name the key when it can.
+        return X11KeyNamer.name(key);
+    }
+
+    @Override
+    public void close() {
+        running = false;
+        listener = null;
+        // Closing the descriptor is what breaks the readers out of their blocking read.
+        for (InputStream in : streams) {
+            try {
+                in.close();
+            } catch (Exception ignored) {
+            }
+        }
+        streams.clear();
+        threads.clear();
+    }
+}

ts3-client/desktop/src/main/java/com/ts3client/hotkey/desktop/KeyNames.java

@@ -0,0 +1,47 @@
+package com.ts3client.hotkey.desktop;
+
+import java.util.Map;
+
+/** Turns X keysym names into the labels users expect on a hotkey button. */
+final class KeyNames {
+
+    private KeyNames() {
+    }
+
+    private static final Map<String, String> SPECIAL = Map.ofEntries(
+            Map.entry("Control_L", "Left Ctrl"),
+            Map.entry("Control_R", "Right Ctrl"),
+            Map.entry("Shift_L", "Left Shift"),
+            Map.entry("Shift_R", "Right Shift"),
+            Map.entry("Alt_L", "Left Alt"),
+            Map.entry("Alt_R", "Right Alt"),
+            Map.entry("ISO_Level3_Shift", "AltGr"),
+            Map.entry("Super_L", "Left Super"),
+            Map.entry("Super_R", "Right Super"),
+            Map.entry("Meta_L", "Left Meta"),
+            Map.entry("Meta_R", "Right Meta"),
+            Map.entry("Prior", "Page Up"),
+            Map.entry("Next", "Page Down"),
+            Map.entry("Return", "Enter"),
+            Map.entry("space", "Space"),
+            Map.entry("BackSpace", "Backspace"),
+            Map.entry("Escape", "Esc"),
+            Map.entry("Caps_Lock", "Caps Lock"),
+            Map.entry("Num_Lock", "Num Lock"),
+            Map.entry("Scroll_Lock", "Scroll Lock"),
+            Map.entry("Menu", "Menu"),
+            Map.entry("Print", "Print Screen"));
+
+    /**
+     * @param keysym the X name of the keysym, e.g. {@code a}, {@code Control_L}, {@code KP_Add}
+     * @return a display name, or {@code null} when there is nothing sensible to show
+     */
+    static String pretty(String keysym) {
+        if (keysym == null || keysym.isBlank()) return null;
+        String special = SPECIAL.get(keysym);
+        if (special != null) return special;
+        if (keysym.startsWith("KP_")) return "Numpad " + pretty(keysym.substring(3));
+        if (keysym.length() == 1) return keysym.toUpperCase();
+        return keysym.replace('_', ' ');
+    }
+}

ts3-client/desktop/src/main/java/com/ts3client/hotkey/desktop/RawInput.java

@@ -0,0 +1,109 @@
+package com.ts3client.hotkey.desktop;
+
+import com.ts3client.hotkey.HotkeyKey;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Layout of a {@code RAWINPUT} structure and the reading of the two kinds we ask for,
+ * split out from {@link WindowsInputHook} so the decoding can be tested anywhere.
+ *
+ * <p>Keyboards report a set-1 scan code, which is what a binding stores: it names the
+ * physical key, so it survives a layout change exactly as an X keycode does on Linux.
+ * Mice are renumbered to the X button numbering the rest of the client already speaks,
+ * so {@link HotkeyKey#fallbackName()} and the saved bindings mean the same thing on
+ * both platforms.
+ */
+final class RawInput {
+
+    private RawInput() {
+    }
+
+    /** {@code RAWINPUTHEADER.dwType}. */
+    static final int TYPE_MOUSE = 0;
+    static final int TYPE_KEYBOARD = 1;
+
+    /** Field offsets in {@code RAWINPUT} under x64, past the 24-byte header. */
+    static final long HEADER_TYPE = 0;
+    static final long HEADER_SIZE = 24;
+    static final long KEYBOARD_MAKE_CODE = 24;
+    static final long KEYBOARD_FLAGS = 26;
+    static final long KEYBOARD_VKEY = 30;
+    static final long MOUSE_BUTTON_FLAGS = 28;
+
+    /** Both event kinds fit comfortably; the larger, {@code RAWMOUSE}, needs 48 bytes. */
+    static final long BUFFER_SIZE = 64;
+
+    /** {@code RAWKEYBOARD.Flags}. */
+    static final int RI_KEY_BREAK = 0x01;
+    static final int RI_KEY_E0 = 0x02;
+    static final int RI_KEY_E1 = 0x04;
+
+    /** {@code VK_NO_VKEY}: the filler half of an escaped sequence, carrying no key. */
+    private static final int VKEY_NONE = 0xFF;
+
+    /** {@code RAWMOUSE.usButtonFlags}, in down/up pairs. */
+    private static final int[] BUTTON_FLAGS = {
+            0x0001, 0x0002, 1,   // left
+            0x0010, 0x0020, 2,   // middle
+            0x0004, 0x0008, 3,   // right
+            0x0040, 0x0080, 8,   // X1, "Mouse 4"
+            0x0100, 0x0200, 9,   // X2, "Mouse 5"
+    };
+
+    private static final int RI_MOUSE_WHEEL = 0x0400;
+    private static final int RI_MOUSE_HWHEEL = 0x0800;
+
+    /**
+     * The scan code identifying a key, with the escape prefix folded into the high byte
+     * so that e.g. right Ctrl ({@code E0 1D}) stays distinct from left ({@code 1D}).
+     *
+     * @return the code, or -1 when the event names no key of its own
+     */
+    static int scanCode(int makeCode, int flags, int vkey) {
+        if (vkey == VKEY_NONE) return -1;
+        int code = makeCode & 0xFF;
+        if (code == 0) return -1;
+        if ((flags & RI_KEY_E0) != 0) code |= 0xE000;
+        else if ((flags & RI_KEY_E1) != 0) code |= 0xE100;
+        return code;
+    }
+
+    static boolean isRelease(int flags) {
+        return (flags & RI_KEY_BREAK) != 0;
+    }
+
+    /** One button transition, in the order the flags word packs them. */
+    record ButtonEvent(HotkeyKey key, boolean pressed) {
+    }
+
+    /**
+     * Unpacks a mouse event, which may carry several transitions at once.
+     *
+     * @param buttonFlags {@code usButtonFlags}
+     * @param wheelDelta  {@code usButtonData}, read as a signed delta when a wheel bit is set
+     */
+    static List<ButtonEvent> buttons(int buttonFlags, short wheelDelta) {
+        List<ButtonEvent> events = new ArrayList<>();
+        for (int i = 0; i < BUTTON_FLAGS.length; i += 3) {
+            HotkeyKey key = HotkeyKey.mouse(BUTTON_FLAGS[i + 2]);
+            if ((buttonFlags & BUTTON_FLAGS[i]) != 0) events.add(new ButtonEvent(key, true));
+            if ((buttonFlags & BUTTON_FLAGS[i + 1]) != 0) events.add(new ButtonEvent(key, false));
+        }
+        // A wheel notch has no release of its own; X reports it as a button tap, and the
+        // hotkey engine expects the same shape, so synthesise both edges.
+        if ((buttonFlags & RI_MOUSE_WHEEL) != 0 && wheelDelta != 0) {
+            tap(events, wheelDelta > 0 ? 4 : 5);
+        }
+        if ((buttonFlags & RI_MOUSE_HWHEEL) != 0 && wheelDelta != 0) {
+            tap(events, wheelDelta > 0 ? 7 : 6);
+        }
+        return events;
+    }
+
+    private static void tap(List<ButtonEvent> events, int button) {
+        events.add(new ButtonEvent(HotkeyKey.mouse(button), true));
+        events.add(new ButtonEvent(HotkeyKey.mouse(button), false));
+    }
+}

ts3-client/desktop/src/main/java/com/ts3client/hotkey/desktop/Win32.java

@@ -0,0 +1,210 @@
+package com.ts3client.hotkey.desktop;
+
+import java.lang.foreign.Arena;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.Linker;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.SymbolLookup;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * Raw binding to {@code user32} and {@code kernel32}, with just the calls
+ * {@link WindowsInputHook} needs to own a message-only window and read raw input from it.
+ *
+ * <p>Raw input is the polite way to watch the whole machine on Windows: registering with
+ * {@code RIDEV_INPUTSINK} delivers every key and button even while another application is
+ * in the foreground, and — unlike a {@code WH_KEYBOARD_LL} hook — it observes rather than
+ * intercepts, so nothing can be swallowed and nothing serialises the system input queue.
+ *
+ * <p>Loading is lazy and failure is expected off Windows, where {@link #isAvailable()}
+ * returns {@code false} and the caller falls back to another backend.
+ */
+final class Win32 {
+
+    private Win32() {
+    }
+
+    private static final ValueLayout.OfInt INT = ValueLayout.JAVA_INT;
+    private static final ValueLayout.OfLong LONG = ValueLayout.JAVA_LONG;
+    private static final java.lang.foreign.AddressLayout PTR = ValueLayout.ADDRESS;
+
+    /** Window messages we care about. */
+    static final int WM_DESTROY = 0x0002;
+    static final int WM_CLOSE = 0x0010;
+    static final int WM_INPUT = 0x00FF;
+
+    /** {@code HWND_MESSAGE}: parent for a window that only ever receives messages. */
+    static final long HWND_MESSAGE = -3L;
+
+    /** {@code RIDEV_INPUTSINK}: deliver input even when the window is not in front. */
+    static final int RIDEV_INPUTSINK = 0x00000100;
+
+    /** HID usages for the two devices we register (usage page 1, "generic desktop"). */
+    static final int USAGE_PAGE_GENERIC = 0x01;
+    static final int USAGE_MOUSE = 0x02;
+    static final int USAGE_KEYBOARD = 0x06;
+
+    /** {@code RID_INPUT}: ask {@code GetRawInputData} for the payload, not the header. */
+    static final int RID_INPUT = 0x10000003;
+
+    /** {@code WNDCLASSEXW} size and the field offsets we fill, under x64. */
+    static final long WNDCLASS_SIZE = 80;
+    static final long WNDCLASS_CBSIZE = 0;
+    static final long WNDCLASS_WNDPROC = 8;
+    static final long WNDCLASS_HINSTANCE = 24;
+    static final long WNDCLASS_CLASSNAME = 64;
+
+    /** {@code RAWINPUTDEVICE}: usage page, usage, flags, target window. */
+    static final long RAWINPUTDEVICE_SIZE = 16;
+    static final long RAWINPUTDEVICE_USAGE_PAGE = 0;
+    static final long RAWINPUTDEVICE_USAGE = 2;
+    static final long RAWINPUTDEVICE_FLAGS = 4;
+    static final long RAWINPUTDEVICE_TARGET = 8;
+
+    /** {@code MSG} is 48 bytes under x64. */
+    static final long MSG_SIZE = 48;
+
+    /** The C signature of a {@code WNDPROC}. */
+    static final FunctionDescriptor WND_PROC =
+            FunctionDescriptor.of(LONG, PTR, INT, LONG, LONG);
+
+    private static final Linker LINKER = Linker.nativeLinker();
+
+    private static final class Libs {
+        static final SymbolLookup USER32 = SymbolLookup.libraryLookup("user32.dll", Arena.global());
+        static final SymbolLookup KERNEL32 = SymbolLookup.libraryLookup("kernel32.dll", Arena.global());
+
+        static final MethodHandle GET_MODULE_HANDLE =
+                downcall(KERNEL32, "GetModuleHandleW", FunctionDescriptor.of(PTR, PTR));
+        static final MethodHandle REGISTER_CLASS =
+                downcall(USER32, "RegisterClassExW", FunctionDescriptor.of(INT, PTR));
+        static final MethodHandle UNREGISTER_CLASS =
+                downcall(USER32, "UnregisterClassW", FunctionDescriptor.of(INT, PTR, PTR));
+        static final MethodHandle CREATE_WINDOW =
+                downcall(USER32, "CreateWindowExW", FunctionDescriptor.of(PTR,
+                        INT, PTR, PTR, INT, INT, INT, INT, INT, PTR, PTR, PTR, PTR));
+        static final MethodHandle DESTROY_WINDOW =
+                downcall(USER32, "DestroyWindow", FunctionDescriptor.of(INT, PTR));
+        static final MethodHandle DEF_WINDOW_PROC =
+                downcall(USER32, "DefWindowProcW", FunctionDescriptor.of(LONG, PTR, INT, LONG, LONG));
+        static final MethodHandle GET_MESSAGE =
+                downcall(USER32, "GetMessageW", FunctionDescriptor.of(INT, PTR, PTR, INT, INT));
+        static final MethodHandle DISPATCH_MESSAGE =
+                downcall(USER32, "DispatchMessageW", FunctionDescriptor.of(LONG, PTR));
+        static final MethodHandle POST_MESSAGE =
+                downcall(USER32, "PostMessageW", FunctionDescriptor.of(INT, PTR, INT, LONG, LONG));
+        static final MethodHandle POST_QUIT_MESSAGE =
+                downcall(USER32, "PostQuitMessage", FunctionDescriptor.ofVoid(INT));
+        static final MethodHandle REGISTER_RAW_INPUT =
+                downcall(USER32, "RegisterRawInputDevices", FunctionDescriptor.of(INT, PTR, INT, INT));
+        static final MethodHandle GET_RAW_INPUT_DATA =
+                downcall(USER32, "GetRawInputData",
+                        FunctionDescriptor.of(INT, PTR, INT, PTR, PTR, INT));
+        static final MethodHandle GET_KEY_NAME_TEXT =
+                downcall(USER32, "GetKeyNameTextW", FunctionDescriptor.of(INT, INT, PTR, INT));
+    }
+
+    private static MethodHandle downcall(SymbolLookup lookup, String symbol,
+                                         FunctionDescriptor descriptor) {
+        return LINKER.downcallHandle(
+                lookup.find(symbol).orElseThrow(() ->
+                        new UnsatisfiedLinkError("unresolved symbol " + symbol)),
+                descriptor);
+    }
+
+    static boolean isWindows() {
+        return System.getProperty("os.name", "").toLowerCase().startsWith("windows");
+    }
+
+    static boolean isAvailable() {
+        if (!isWindows()) return false;
+        try {
+            return Libs.USER32 != null && Libs.KERNEL32 != null;
+        } catch (Throwable t) {
+            return false;
+        }
+    }
+
+    /** Allocates a null-terminated UTF-16 string, as every {@code ...W} entry point wants. */
+    static MemorySegment wide(Arena arena, String text) {
+        return arena.allocateFrom(text, StandardCharsets.UTF_16LE);
+    }
+
+    static MemorySegment moduleHandle() {
+        return (MemorySegment) call(Libs.GET_MODULE_HANDLE, MemorySegment.NULL);
+    }
+
+    /** @return the class atom, or 0 when registration failed */
+    static int registerClass(MemorySegment wndClass) {
+        return (int) call(Libs.REGISTER_CLASS, wndClass);
+    }
+
+    static void unregisterClass(MemorySegment className, MemorySegment instance) {
+        call(Libs.UNREGISTER_CLASS, className, instance);
+    }
+
+    /** Creates a message-only window: no pixels, but it has a queue and can be a target. */
+    static MemorySegment createMessageWindow(MemorySegment className, MemorySegment instance) {
+        return (MemorySegment) call(Libs.CREATE_WINDOW, 0, className, MemorySegment.NULL, 0,
+                0, 0, 0, 0, MemorySegment.ofAddress(HWND_MESSAGE),
+                MemorySegment.NULL, instance, MemorySegment.NULL);
+    }
+
+    static void destroyWindow(MemorySegment window) {
+        call(Libs.DESTROY_WINDOW, window);
+    }
+
+    static long defWindowProc(MemorySegment window, int message, long wParam, long lParam) {
+        return (long) call(Libs.DEF_WINDOW_PROC, window, message, wParam, lParam);
+    }
+
+    /** @return 1 for a message, 0 for {@code WM_QUIT}, -1 on error */
+    static int getMessage(MemorySegment message) {
+        return (int) call(Libs.GET_MESSAGE, message, MemorySegment.NULL, 0, 0);
+    }
+
+    static void dispatchMessage(MemorySegment message) {
+        call(Libs.DISPATCH_MESSAGE, message);
+    }
+
+    static void postMessage(MemorySegment window, int message, long wParam, long lParam) {
+        call(Libs.POST_MESSAGE, window, message, wParam, lParam);
+    }
+
+    static void postQuitMessage(int exitCode) {
+        call(Libs.POST_QUIT_MESSAGE, exitCode);
+    }
+
+    /** @return whether the devices were registered for background delivery */
+    static boolean registerRawInputDevices(MemorySegment devices, int count) {
+        return (int) call(Libs.REGISTER_RAW_INPUT, devices, count, (int) RAWINPUTDEVICE_SIZE) != 0;
+    }
+
+    /** @return bytes written into {@code buffer}, or -1 on failure */
+    static int getRawInputData(MemorySegment handle, MemorySegment buffer, MemorySegment size) {
+        return (int) call(Libs.GET_RAW_INPUT_DATA, handle, RID_INPUT, buffer, size,
+                (int) RawInput.HEADER_SIZE);
+    }
+
+    /**
+     * The layout's name for a key.
+     *
+     * @param lParam scan code in bits 16..23, the extended flag in bit 24, as the API wants
+     */
+    static String keyName(int lParam, Arena arena) {
+        MemorySegment buffer = arena.allocate(128);
+        int length = (int) call(Libs.GET_KEY_NAME_TEXT, lParam, buffer, 64);
+        if (length <= 0) return null;
+        return buffer.getString(0, StandardCharsets.UTF_16LE);
+    }
+
+    private static Object call(MethodHandle handle, Object... args) {
+        try {
+            return handle.invokeWithArguments(args);
+        } catch (Throwable t) {
+            throw new IllegalStateException("Win32 call failed", t);
+        }
+    }
+}

ts3-client/desktop/src/main/java/com/ts3client/hotkey/desktop/WindowsInputHook.java

@@ -0,0 +1,234 @@
+package com.ts3client.hotkey.desktop;
+
+import com.ts3client.hotkey.GlobalInputHook;
+import com.ts3client.hotkey.HotkeyKey;
+
+import java.lang.foreign.Arena;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * System-wide input hook for Windows, built on raw input: a message-only window
+ * registers the keyboard and mouse with {@code RIDEV_INPUTSINK}, so every key and button
+ * on the machine arrives as {@code WM_INPUT} whether or not this application is in front,
+ * and the event still reaches the foreground window untouched.
+ *
+ * <p>Chosen over a {@code WH_KEYBOARD_LL} hook because raw input only observes: it cannot
+ * swallow a keystroke, it does not put this process in the path of the system input queue
+ * — where a slow callback stalls typing everywhere — and it reports the side buttons and
+ * both edges of every key, which push-to-talk needs.
+ *
+ * <p>A window's messages belong to the thread that created it, so the window is created
+ * on the pump thread and {@link #start} waits to hear whether that succeeded.
+ */
+public final class WindowsInputHook implements GlobalInputHook {
+
+    private static final String WINDOW_CLASS = "Ts3jHotkeyInputSink";
+
+    /** How long to wait for the pump thread to stand its window up before giving up. */
+    private static final long STARTUP_TIMEOUT_SECONDS = 5;
+
+    private static final MethodHandle WND_PROC;
+
+    static {
+        try {
+            WND_PROC = MethodHandles.lookup().findStatic(WindowsInputHook.class, "onMessage",
+                    MethodType.methodType(long.class, MemorySegment.class, int.class,
+                            long.class, long.class));
+        } catch (ReflectiveOperationException e) {
+            throw new ExceptionInInitializerError(e);
+        }
+    }
+
+    /** The running hook, for the static window procedure to find its way back. */
+    private static volatile WindowsInputHook current;
+
+    private volatile MemorySegment window = MemorySegment.NULL;
+    private Thread thread;
+    private volatile Listener listener;
+    private volatile boolean running;
+    private volatile String unavailable = "not started";
+
+    public static boolean isSupported() {
+        return Win32.isAvailable();
+    }
+
+    @Override
+    public void start(Listener listener) {
+        this.listener = listener;
+        CountDownLatch ready = new CountDownLatch(1);
+        thread = new Thread(() -> pump(ready), "ts3j-hotkeys-rawinput");
+        thread.setDaemon(true);
+        thread.start();
+        try {
+            if (!ready.await(STARTUP_TIMEOUT_SECONDS, TimeUnit.SECONDS)) {
+                unavailable = "the raw input window did not come up";
+            }
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            unavailable = "interrupted while starting";
+        }
+    }
+
+    /** Owns the window for its whole life: creates it, pumps it, tears it down. */
+    private void pump(CountDownLatch ready) {
+        boolean signalled = false;
+        try (Arena arena = Arena.ofConfined()) {
+            MemorySegment className = Win32.wide(arena, WINDOW_CLASS);
+            MemorySegment instance = Win32.moduleHandle();
+            MemorySegment stub = java.lang.foreign.Linker.nativeLinker()
+                    .upcallStub(WND_PROC, Win32.WND_PROC, arena);
+
+            MemorySegment wndClass = arena.allocate(Win32.WNDCLASS_SIZE);
+            wndClass.set(ValueLayout.JAVA_INT, Win32.WNDCLASS_CBSIZE, (int) Win32.WNDCLASS_SIZE);
+            wndClass.set(ValueLayout.ADDRESS, Win32.WNDCLASS_WNDPROC, stub);
+            wndClass.set(ValueLayout.ADDRESS, Win32.WNDCLASS_HINSTANCE, instance);
+            wndClass.set(ValueLayout.ADDRESS, Win32.WNDCLASS_CLASSNAME, className);
+            // A leftover registration from an earlier run in this process is harmless:
+            // CreateWindowEx only needs the class to exist.
+            Win32.registerClass(wndClass);
+
+            MemorySegment hwnd = Win32.createMessageWindow(className, instance);
+            if (hwnd.equals(MemorySegment.NULL)) {
+                unavailable = "cannot create the raw input window";
+                return;
+            }
+            window = hwnd;
+
+            if (!Win32.registerRawInputDevices(rawInputDevices(arena, hwnd), 2)) {
+                unavailable = "RegisterRawInputDevices failed";
+                Win32.destroyWindow(hwnd);
+                window = MemorySegment.NULL;
+                return;
+            }
+
+            current = this;
+            running = true;
+            unavailable = "";
+            ready.countDown();
+            signalled = true;
+
+            MemorySegment message = arena.allocate(Win32.MSG_SIZE);
+            while (running) {
+                int result = Win32.getMessage(message);
+                // 0 is WM_QUIT, -1 an error; either way the window is finished.
+                if (result <= 0) break;
+                Win32.dispatchMessage(message);
+            }
+        } catch (Throwable t) {
+            unavailable = describe(t);
+        } finally {
+            running = false;
+            window = MemorySegment.NULL;
+            if (current == this) current = null;
+            if (!signalled) ready.countDown();
+        }
+    }
+
+    /** The keyboard and the mouse, both asked for in the background. */
+    private static MemorySegment rawInputDevices(Arena arena, MemorySegment hwnd) {
+        MemorySegment devices = arena.allocate(Win32.RAWINPUTDEVICE_SIZE * 2);
+        int[] usages = {Win32.USAGE_KEYBOARD, Win32.USAGE_MOUSE};
+        for (int i = 0; i < usages.length; i++) {
+            long base = i * Win32.RAWINPUTDEVICE_SIZE;
+            devices.set(ValueLayout.JAVA_SHORT, base + Win32.RAWINPUTDEVICE_USAGE_PAGE,
+                    (short) Win32.USAGE_PAGE_GENERIC);
+            devices.set(ValueLayout.JAVA_SHORT, base + Win32.RAWINPUTDEVICE_USAGE,
+                    (short) usages[i]);
+            devices.set(ValueLayout.JAVA_INT, base + Win32.RAWINPUTDEVICE_FLAGS,
+                    Win32.RIDEV_INPUTSINK);
+            devices.set(ValueLayout.ADDRESS, base + Win32.RAWINPUTDEVICE_TARGET, hwnd);
+        }
+        return devices;
+    }
+
+    /** Upcall target: the window procedure. */
+    @SuppressWarnings("unused")
+    private static long onMessage(MemorySegment hwnd, int message, long wParam, long lParam) {
+        WindowsInputHook hook = current;
+        try {
+            if (message == Win32.WM_INPUT && hook != null) {
+                hook.readInput(lParam);
+            } else if (message == Win32.WM_DESTROY) {
+                Win32.postQuitMessage(0);
+                return 0;
+            }
+        } catch (Throwable ignored) {
+        }
+        // WM_INPUT must reach DefWindowProc too, so the system can release the event.
+        return Win32.defWindowProc(hwnd, message, wParam, lParam);
+    }
+
+    /** Copies one {@code RAWINPUT} out of the system and turns it into hotkey events. */
+    private void readInput(long handle) {
+        Listener l = listener;
+        if (l == null) return;
+        try (Arena arena = Arena.ofConfined()) {
+            MemorySegment buffer = arena.allocate(RawInput.BUFFER_SIZE);
+            MemorySegment size = arena.allocate(ValueLayout.JAVA_INT);
+            size.set(ValueLayout.JAVA_INT, 0, (int) RawInput.BUFFER_SIZE);
+            if (Win32.getRawInputData(MemorySegment.ofAddress(handle), buffer, size) <= 0) return;
+
+            switch (buffer.get(ValueLayout.JAVA_INT, RawInput.HEADER_TYPE)) {
+                case RawInput.TYPE_KEYBOARD -> {
+                    int makeCode = buffer.get(ValueLayout.JAVA_SHORT, RawInput.KEYBOARD_MAKE_CODE) & 0xFFFF;
+                    int flags = buffer.get(ValueLayout.JAVA_SHORT, RawInput.KEYBOARD_FLAGS) & 0xFFFF;
+                    int vkey = buffer.get(ValueLayout.JAVA_SHORT, RawInput.KEYBOARD_VKEY) & 0xFFFF;
+                    int code = RawInput.scanCode(makeCode, flags, vkey);
+                    if (code >= 0) l.onInput(HotkeyKey.keyboard(code), !RawInput.isRelease(flags));
+                }
+                case RawInput.TYPE_MOUSE -> {
+                    int flags = buffer.get(ValueLayout.JAVA_SHORT, RawInput.MOUSE_BUTTON_FLAGS) & 0xFFFF;
+                    short data = buffer.get(ValueLayout.JAVA_SHORT, RawInput.MOUSE_BUTTON_FLAGS + 2);
+                    for (RawInput.ButtonEvent e : RawInput.buttons(flags, data)) {
+                        l.onInput(e.key(), e.pressed());
+                    }
+                }
+                default -> {
+                }
+            }
+        } catch (Throwable ignored) {
+        }
+    }
+
+    @Override
+    public boolean isRunning() {
+        return running;
+    }
+
+    @Override
+    public String unavailableReason() {
+        return running ? "" : unavailable;
+    }
+
+    @Override
+    public String keyName(HotkeyKey key) {
+        return WindowsKeyNamer.name(key);
+    }
+
+    @Override
+    public void close() {
+        listener = null;
+        running = false;
+        MemorySegment hwnd = window;
+        try {
+            // Closing has to happen on the pump thread; ask it to, then let it unwind.
+            if (!hwnd.equals(MemorySegment.NULL)) Win32.postMessage(hwnd, Win32.WM_CLOSE, 0, 0);
+            if (thread != null) thread.join(2000);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        } catch (Throwable ignored) {
+        }
+        thread = null;
+    }
+
+    private static String describe(Throwable t) {
+        String message = t.getMessage();
+        return (message == null || message.isBlank()) ? t.getClass().getSimpleName() : message;
+    }
+}

ts3-client/desktop/src/main/java/com/ts3client/hotkey/desktop/WindowsKeyNamer.java

@@ -0,0 +1,37 @@
+package com.ts3client.hotkey.desktop;
+
+import com.ts3client.hotkey.HotkeyKey;
+
+import java.lang.foreign.Arena;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Names scan codes through the active Windows layout, so a hotkey button shows "A"
+ * rather than "Key 30" — the counterpart to {@link X11KeyNamer}.
+ *
+ * <p>{@code GetKeyNameTextW} wants the scan code where a {@code WM_KEYDOWN} would carry
+ * it: bits 16..23, with bit 24 marking the {@code E0} escape.
+ */
+final class WindowsKeyNamer {
+
+    private WindowsKeyNamer() {
+    }
+
+    private static final Map<Integer, String> CACHE = new HashMap<>();
+
+    static synchronized String name(HotkeyKey key) {
+        if (key.device() != HotkeyKey.Device.KEYBOARD) return null;
+        if (!Win32.isAvailable()) return null;
+        return CACHE.computeIfAbsent(key.code(), code -> {
+            try (Arena arena = Arena.ofConfined()) {
+                int lParam = (code & 0xFF) << 16;
+                if ((code & 0xE000) == 0xE000) lParam |= 1 << 24;
+                String name = Win32.keyName(lParam, arena);
+                return (name == null || name.isBlank()) ? null : name;
+            } catch (Throwable t) {
+                return null;
+            }
+        });
+    }
+}

ts3-client/desktop/src/main/java/com/ts3client/hotkey/desktop/X11KeyNamer.java

@@ -0,0 +1,47 @@
+package com.ts3client.hotkey.desktop;
+
+import com.ts3client.hotkey.HotkeyKey;
+
+import java.lang.foreign.MemorySegment;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Names keycodes using the X keyboard layout, so a hotkey button shows "A" rather than
+ * "Key 38". Bindings themselves stay layout-independent; only the label comes from here.
+ *
+ * <p>Keeps one long-lived display connection of its own, opened on first use, so it can
+ * be asked from any thread without racing the input hooks' own connections.
+ */
+final class X11KeyNamer {
+
+    private X11KeyNamer() {
+    }
+
+    private static final Map<Integer, String> CACHE = new HashMap<>();
+    private static MemorySegment display;
+    private static boolean tried;
+
+    static synchronized String name(HotkeyKey key) {
+        if (key.device() != HotkeyKey.Device.KEYBOARD) return null;
+        if (!tried) {
+            tried = true;
+            try {
+                if (Xlib.isCoreAvailable() && System.getenv("DISPLAY") != null) {
+                    display = Xlib.openDisplay();
+                }
+            } catch (Throwable ignored) {
+                display = null;
+            }
+        }
+        if (display == null || display.equals(MemorySegment.NULL)) return null;
+        return CACHE.computeIfAbsent(key.code(), code -> {
+            try {
+                long sym = Xlib.keysym(display, code);
+                return sym == 0 ? null : KeyNames.pretty(Xlib.keysymName(sym));
+            } catch (Throwable t) {
+                return null;
+            }
+        });
+    }
+}

ts3-client/desktop/src/main/java/com/ts3client/hotkey/desktop/XInput2InputHook.java

@@ -0,0 +1,206 @@
+package com.ts3client.hotkey.desktop;
+
+import com.ts3client.hotkey.GlobalInputHook;
+import com.ts3client.hotkey.HotkeyKey;
+
+import java.lang.foreign.Arena;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.ValueLayout;
+
+/**
+ * System-wide input hook built on XInput2 raw events, the way TeamSpeak's own Linux
+ * client does it: {@code XI_RawKeyPress} and friends are selected on the root window, so
+ * every key and button on the machine arrives here regardless of which window has focus,
+ * and the event still reaches that window untouched.
+ *
+ * <p>Raw events report the device's own view of the key, before focus routing and before
+ * any layout mapping, which is precisely what a hotkey wants — the detail field is the
+ * keycode, matching how {@link HotkeyKey} identifies keys.
+ *
+ * <p>On at least some driver stacks, {@code XI_RawButtonRelease} is never delivered here
+ * at all: the X server hands the initiating {@code XI_RawButtonPress} to every raw
+ * listener, but the matching release only reaches whichever client holds the pointer's
+ * implicit per-click grab, which is never us. An active {@code XIGrabDevice} grab makes
+ * this hook that owner and does fix delivery, but even with {@code owner_events} set it
+ * stopped clicks from reaching other windows at all — worse than the bug it fixes — so it
+ * is not used here. {@link XRecordInputHook} is unaffected and takes over first on X11 as
+ * a result; this hook stays as its fallback for servers without RECORD.
+ *
+ * <p>Under Wayland this hook lives inside Xwayland and therefore sees what Xwayland is
+ * given: every X11 client, plus — on compositors that allow it, KWin's "legacy X11 app
+ * support" among them — keys aimed at native Wayland windows too. Where the compositor
+ * forwards nothing, {@link EvdevInputHook} is the way out.
+ */
+public final class XInput2InputHook implements GlobalInputHook {
+
+    /** How long the event loop sleeps on the socket before rechecking {@link #running}. */
+    private static final int POLL_TIMEOUT_MILLIS = 200;
+
+    private Arena arena;
+    private MemorySegment display = MemorySegment.NULL;
+    private int opcode = -1;
+    private Thread thread;
+    private volatile Listener listener;
+    private volatile boolean running;
+    private volatile String unavailable = "not started";
+
+    public static boolean isSupported() {
+        return Xlib.isInputAvailable() && System.getenv("DISPLAY") != null;
+    }
+
+    @Override
+    public void start(Listener listener) {
+        this.listener = listener;
+        try {
+            open();
+        } catch (Throwable t) {
+            unavailable = describe(t);
+            closeQuietly();
+        }
+    }
+
+    private void open() {
+        arena = Arena.ofShared();
+        display = Xlib.openDisplay();
+        if (display.equals(MemorySegment.NULL)) {
+            throw new IllegalStateException("cannot open the X display");
+        }
+        opcode = Xlib.queryExtension(display, "XInputExtension", arena);
+        if (opcode < 0) throw new IllegalStateException("the X server has no XInput extension");
+        if (!Xlib.queryInputVersion(display, arena)) {
+            throw new IllegalStateException("the X server does not speak XInput 2");
+        }
+
+        long root = Xlib.defaultRootWindow(display);
+        int maskLen = maskLen();
+        MemorySegment bits = rawMaskBits(maskLen);
+        int[] masters = Xlib.queryMasterDeviceIds(display, arena);
+        Xlib.selectInputEvents(display, root, masters, bits, maskLen, arena);
+        Xlib.sync(display);
+
+        running = true;
+        unavailable = "";
+        thread = new Thread(this::pump, "ts3j-hotkeys-xinput2");
+        thread.setDaemon(true);
+        thread.start();
+    }
+
+    private static int maskLen() {
+        // XIMaskLen(event): the byte length of a mask covering event types up to this one.
+        return (Xlib.XI_RAW_BUTTON_RELEASE >> 3) + 1;
+    }
+
+    /** The four raw event types, as a byte mask in {@code XISetMask} order. */
+    private MemorySegment rawMaskBits(int maskLen) {
+        MemorySegment bits = arena.allocate(maskLen);
+        for (int type : new int[]{Xlib.XI_RAW_KEY_PRESS, Xlib.XI_RAW_KEY_RELEASE,
+                Xlib.XI_RAW_BUTTON_PRESS, Xlib.XI_RAW_BUTTON_RELEASE}) {
+            long index = type / 8;
+            byte bit = (byte) (1 << (type % 8));
+            bits.set(ValueLayout.JAVA_BYTE, index,
+                    (byte) (bits.get(ValueLayout.JAVA_BYTE, index) | bit));
+        }
+        return bits;
+    }
+
+    private void pump() {
+        try (Arena loop = Arena.ofConfined()) {
+            MemorySegment event = loop.allocate(Xlib.EVENT_SIZE);
+            MemorySegment pollFd = Xlib.pollFd(display, loop);
+            while (running) {
+                if (Xlib.pending(display) <= 0) {
+                    Xlib.awaitEvent(pollFd, POLL_TIMEOUT_MILLIS);
+                    continue;
+                }
+                Xlib.nextEvent(display, event);
+                handle(event);
+            }
+        } catch (Throwable t) {
+            unavailable = describe(t);
+        } finally {
+            running = false;
+        }
+    }
+
+    /** Unpacks one event, which is ours only when it is a generic event from XInput2. */
+    private void handle(MemorySegment event) {
+        if (event.get(ValueLayout.JAVA_INT, Xlib.COOKIE_TYPE) != Xlib.GENERIC_EVENT) return;
+        if (event.get(ValueLayout.JAVA_INT, Xlib.COOKIE_EXTENSION) != opcode) return;
+        if (!Xlib.getEventData(display, event)) return;
+        try {
+            int evtype = event.get(ValueLayout.JAVA_INT, Xlib.COOKIE_EVTYPE);
+            MemorySegment raw = event.get(ValueLayout.ADDRESS, Xlib.COOKIE_DATA);
+            if (raw.equals(MemorySegment.NULL)) return;
+            int detail = raw.reinterpret(Xlib.RAW_EVENT_SIZE)
+                    .get(ValueLayout.JAVA_INT, Xlib.RAW_EVENT_DETAIL);
+            dispatch(evtype, detail);
+        } finally {
+            Xlib.freeEventData(display, event);
+        }
+    }
+
+    private void dispatch(int evtype, int detail) {
+        Listener l = listener;
+        if (l == null) return;
+        switch (evtype) {
+            case Xlib.XI_RAW_KEY_PRESS -> l.onInput(HotkeyKey.keyboard(detail), true);
+            case Xlib.XI_RAW_KEY_RELEASE -> l.onInput(HotkeyKey.keyboard(detail), false);
+            case Xlib.XI_RAW_BUTTON_PRESS -> l.onInput(HotkeyKey.mouse(detail), true);
+            case Xlib.XI_RAW_BUTTON_RELEASE -> l.onInput(HotkeyKey.mouse(detail), false);
+            default -> {
+            }
+        }
+    }
+
+    @Override
+    public boolean isRunning() {
+        return running;
+    }
+
+    @Override
+    public String unavailableReason() {
+        return running ? "" : unavailable;
+    }
+
+    @Override
+    public String keyName(HotkeyKey key) {
+        return X11KeyNamer.name(key);
+    }
+
+    @Override
+    public void close() {
+        listener = null;
+        running = false;
+        try {
+            if (thread != null) thread.join(POLL_TIMEOUT_MILLIS * 5L);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+        closeQuietly();
+    }
+
+    private synchronized void closeQuietly() {
+        // The pump owns the display connection; closing it underneath would crash Xlib.
+        boolean pumpDone = thread == null || !thread.isAlive();
+        if (pumpDone) {
+            try {
+                if (!display.equals(MemorySegment.NULL)) Xlib.closeDisplay(display);
+            } catch (Throwable ignored) {
+            }
+            display = MemorySegment.NULL;
+            if (arena != null) {
+                try {
+                    arena.close();
+                } catch (Throwable ignored) {
+                }
+                arena = null;
+            }
+            thread = null;
+        }
+    }
+
+    private static String describe(Throwable t) {
+        String message = t.getMessage();
+        return (message == null || message.isBlank()) ? t.getClass().getSimpleName() : message;
+    }
+}

ts3-client/desktop/src/main/java/com/ts3client/hotkey/desktop/XRecordInputHook.java

@@ -0,0 +1,212 @@
+package com.ts3client.hotkey.desktop;
+
+import com.ts3client.hotkey.GlobalInputHook;
+import com.ts3client.hotkey.HotkeyKey;
+
+import java.lang.foreign.Arena;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+
+/**
+ * System-wide input hook built on X11's RECORD extension: it taps the core key and
+ * button events the server delivers to every client, so hotkeys work no matter which
+ * window has focus, and the keystroke still reaches that window untouched.
+ *
+ * <p>Two connections are needed, as RECORD demands: a control one that creates and
+ * later tears the context down, and a data one that blocks inside
+ * {@code XRecordEnableContext} handing us events.
+ *
+ * <p>Under Wayland the X server only ever sees events aimed at X clients, so this hook
+ * is not truly global there; {@link EvdevInputHook} is the way out.
+ */
+public final class XRecordInputHook implements GlobalInputHook {
+
+    private static final MethodHandle CALLBACK;
+
+    static {
+        try {
+            CALLBACK = MethodHandles.lookup().findStatic(XRecordInputHook.class, "onRecorded",
+                    MethodType.methodType(void.class, MemorySegment.class, MemorySegment.class));
+        } catch (ReflectiveOperationException e) {
+            throw new ExceptionInInitializerError(e);
+        }
+    }
+
+    /** The running hook, for the static upcall to find its way back. */
+    private static volatile XRecordInputHook current;
+
+    private Arena arena;
+    private MemorySegment control = MemorySegment.NULL;
+    private MemorySegment data = MemorySegment.NULL;
+    private long context;
+    private Thread thread;
+    private volatile Listener listener;
+    private volatile boolean running;
+    private volatile String unavailable = "not started";
+
+    public static boolean isSupported() {
+        return Xlib.isAvailable() && System.getenv("DISPLAY") != null;
+    }
+
+    @Override
+    public void start(Listener listener) {
+        this.listener = listener;
+        try {
+            open();
+        } catch (Throwable t) {
+            unavailable = describe(t);
+            closeQuietly();
+        }
+    }
+
+    private void open() {
+        arena = Arena.ofShared();
+        control = Xlib.openDisplay();
+        if (control.equals(MemorySegment.NULL)) {
+            throw new IllegalStateException("cannot open the X display");
+        }
+        if (!Xlib.queryRecordVersion(control, arena)) {
+            throw new IllegalStateException("the X server has no RECORD extension");
+        }
+
+        MemorySegment range = Xlib.allocRange();
+        if (range.equals(MemorySegment.NULL)) throw new IllegalStateException("XRecordAllocRange failed");
+        MemorySegment r = range.reinterpret(64);
+        r.set(ValueLayout.JAVA_BYTE, Xlib.RANGE_DEVICE_EVENTS_FIRST, (byte) Xlib.KEY_PRESS);
+        r.set(ValueLayout.JAVA_BYTE, Xlib.RANGE_DEVICE_EVENTS_LAST, (byte) Xlib.BUTTON_RELEASE);
+
+        MemorySegment clients = arena.allocate(ValueLayout.JAVA_LONG);
+        clients.set(ValueLayout.JAVA_LONG, 0, Xlib.ALL_CLIENTS);
+        MemorySegment ranges = arena.allocate(ValueLayout.ADDRESS);
+        ranges.set(ValueLayout.ADDRESS, 0, range);
+
+        context = Xlib.createContext(control, clients, 1, ranges, 1);
+        if (context == 0) throw new IllegalStateException("XRecordCreateContext failed");
+        // The context id is allocated client-side and the request is not a round trip:
+        // without this the second connection can enable a context the server has yet to
+        // create, which it answers with BadContext.
+        Xlib.sync(control);
+
+        data = Xlib.openDisplay();
+        if (data.equals(MemorySegment.NULL)) {
+            throw new IllegalStateException("cannot open the second X display connection");
+        }
+
+        MemorySegment stub = java.lang.foreign.Linker.nativeLinker()
+                .upcallStub(CALLBACK, Xlib.INTERCEPT_PROC, arena);
+
+        current = this;
+        running = true;
+        unavailable = "";
+        thread = new Thread(() -> {
+            try {
+                // Blocks until close() disables the context from the control connection.
+                Xlib.enableContext(data, context, stub);
+            } catch (Throwable ignored) {
+            } finally {
+                running = false;
+            }
+        }, "ts3j-hotkeys-xrecord");
+        thread.setDaemon(true);
+        thread.start();
+    }
+
+    /** Upcall target: one recorded protocol datum. */
+    @SuppressWarnings("unused")
+    private static void onRecorded(MemorySegment closure, MemorySegment recorded) {
+        XRecordInputHook hook = current;
+        MemorySegment d = recorded.reinterpret(48);
+        try {
+            if (hook == null || d.get(ValueLayout.JAVA_INT, Xlib.INTERCEPT_CATEGORY) != Xlib.FROM_SERVER) {
+                return;
+            }
+            long length = d.get(ValueLayout.JAVA_LONG, Xlib.INTERCEPT_DATA_LEN);
+            MemorySegment event = d.get(ValueLayout.ADDRESS, Xlib.INTERCEPT_DATA);
+            // data_len counts 4-byte units; a core event is always 32 bytes.
+            if (event.equals(MemorySegment.NULL) || length < 2) return;
+            event = event.reinterpret(32);
+            hook.dispatch(event.get(ValueLayout.JAVA_BYTE, 0) & 0x7f,
+                    event.get(ValueLayout.JAVA_BYTE, 1) & 0xff);
+        } catch (Throwable ignored) {
+        } finally {
+            Xlib.freeData(recorded);
+        }
+    }
+
+    private void dispatch(int type, int detail) {
+        Listener l = listener;
+        if (l == null) return;
+        switch (type) {
+            case Xlib.KEY_PRESS -> l.onInput(HotkeyKey.keyboard(detail), true);
+            case Xlib.KEY_RELEASE -> l.onInput(HotkeyKey.keyboard(detail), false);
+            case Xlib.BUTTON_PRESS -> l.onInput(HotkeyKey.mouse(detail), true);
+            case Xlib.BUTTON_RELEASE -> l.onInput(HotkeyKey.mouse(detail), false);
+            default -> {
+            }
+        }
+    }
+
+    @Override
+    public boolean isRunning() {
+        return running;
+    }
+
+    @Override
+    public String unavailableReason() {
+        return running ? "" : unavailable;
+    }
+
+    @Override
+    public String keyName(HotkeyKey key) {
+        return X11KeyNamer.name(key);
+    }
+
+    @Override
+    public void close() {
+        listener = null;
+        running = false;
+        try {
+            if (!control.equals(MemorySegment.NULL) && context != 0) {
+                Xlib.disableContext(control, context);
+                Xlib.flush(control);
+            }
+            if (thread != null) thread.join(1000);
+        } catch (Throwable ignored) {
+        }
+        closeQuietly();
+    }
+
+    private synchronized void closeQuietly() {
+        if (current == this) current = null;
+        try {
+            if (!control.equals(MemorySegment.NULL) && context != 0) Xlib.freeContext(control, context);
+        } catch (Throwable ignored) {
+        }
+        context = 0;
+        for (MemorySegment display : new MemorySegment[]{data, control}) {
+            try {
+                if (!display.equals(MemorySegment.NULL)) Xlib.closeDisplay(display);
+            } catch (Throwable ignored) {
+            }
+        }
+        data = control = MemorySegment.NULL;
+        // The arena owns the upcall stub: freeing it while the recording thread could
+        // still call into it would take the JVM down, so a stuck thread keeps it alive.
+        if (arena != null && (thread == null || !thread.isAlive())) {
+            try {
+                arena.close();
+            } catch (Throwable ignored) {
+            }
+            arena = null;
+        }
+        thread = null;
+    }
+
+    private static String describe(Throwable t) {
+        String message = t.getMessage();
+        return (message == null || message.isBlank()) ? t.getClass().getSimpleName() : message;
+    }
+}

ts3-client/desktop/src/main/java/com/ts3client/hotkey/desktop/Xlib.java

@@ -0,0 +1,400 @@
+package com.ts3client.hotkey.desktop;
+
+import java.lang.foreign.Arena;
+import java.lang.foreign.FunctionDescriptor;
+import java.lang.foreign.Linker;
+import java.lang.foreign.MemorySegment;
+import java.lang.foreign.SymbolLookup;
+import java.lang.foreign.ValueLayout;
+import java.lang.invoke.MethodHandle;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * Raw binding to {@code libX11}, the XInput2 extension in {@code libXi} and the RECORD
+ * extension in {@code libXtst}, with just the calls the X11 hooks need.
+ *
+ * <p>Both extensions let a client watch input the server delivers to everyone else
+ * without intercepting it, which is exactly what a global hotkey needs: the keystroke
+ * still reaches the focused application. See {@link DesktopInputHooks#addX11Hooks} for
+ * which one is preferred and why.
+ *
+ * <p>Each library loads lazily and failure is expected — with no X11 around, the
+ * {@code is*Available()} probes return {@code false} and the caller falls back to
+ * another backend.
+ */
+final class Xlib {
+
+    private Xlib() {
+    }
+
+    static final ValueLayout.OfInt INT = ValueLayout.JAVA_INT;
+    static final ValueLayout.OfLong LONG = ValueLayout.JAVA_LONG;
+    private static final java.lang.foreign.AddressLayout PTR = ValueLayout.ADDRESS;
+
+    /** Core event types (X.h) as they appear in the recorded protocol data. */
+    static final int KEY_PRESS = 2;
+    static final int KEY_RELEASE = 3;
+    static final int BUTTON_PRESS = 4;
+    static final int BUTTON_RELEASE = 5;
+
+    /** {@code XRecordAllClients}: record every client, present and future. */
+    static final long ALL_CLIENTS = 3L;
+
+    /** {@code XRecordInterceptData.category} values we care about. */
+    static final int FROM_SERVER = 0;
+
+    /**
+     * {@code XRecordRange}: only {@code device_events} is filled in. Its two bytes sit
+     * after the request/reply and delivered-event ranges, at a fixed LP64 offset.
+     */
+    static final long RANGE_DEVICE_EVENTS_FIRST = 18;
+    static final long RANGE_DEVICE_EVENTS_LAST = 19;
+
+    /** {@code XRecordInterceptData}: the protocol bytes and the reason we were called. */
+    static final long INTERCEPT_CATEGORY = 24;
+    static final long INTERCEPT_DATA = 32;
+    static final long INTERCEPT_DATA_LEN = 40;
+
+    /** {@code GenericEvent}, the envelope every extension event arrives in. */
+    static final int GENERIC_EVENT = 35;
+
+    /** XInput2 raw event types (XI2.h): the device's own view, before any focus routing. */
+    static final int XI_RAW_KEY_PRESS = 13;
+    static final int XI_RAW_KEY_RELEASE = 14;
+    static final int XI_RAW_BUTTON_PRESS = 15;
+    static final int XI_RAW_BUTTON_RELEASE = 16;
+
+    /** {@code XIAllMasterDevices}: raw events reach us through the master devices. */
+    static final int XI_ALL_MASTER_DEVICES = 1;
+
+    /** An {@code XEvent} is a union of 24 longs; a cookie is the widest member we read. */
+    static final long EVENT_SIZE = 192;
+
+    /** {@code XGenericEventCookie} field offsets under LP64. */
+    static final long COOKIE_TYPE = 0;
+    static final long COOKIE_EXTENSION = 32;
+    static final long COOKIE_EVTYPE = 36;
+    static final long COOKIE_DATA = 48;
+
+    /**
+     * {@code XIRawEvent.detail} — the keycode or button number — past the generic header,
+     * {@code time}, {@code deviceid} and {@code sourceid}.
+     */
+    static final long RAW_EVENT_DETAIL = 56;
+    static final long RAW_EVENT_SIZE = 152;
+
+    /** {@code XIEventMask}: {@code deviceid}, {@code mask_len}, then the mask pointer. */
+    static final long EVENT_MASK_SIZE = 16;
+    static final long EVENT_MASK_DEVICEID = 0;
+    static final long EVENT_MASK_LEN = 4;
+    static final long EVENT_MASK_MASK = 8;
+
+    /** {@code XIDeviceInfo.deviceid} — the only field {@link #queryMasterDeviceIds} needs. */
+    static final long DEVICE_INFO_SIZE = 40;
+    static final long DEVICE_INFO_DEVICEID = 0;
+
+    private static final Linker LINKER = Linker.nativeLinker();
+    private static final String[] X11_NAMES = {"libX11.so.6", "libX11.so"};
+    private static final String[] XI_NAMES = {"libXi.so.6", "libXi.so"};
+    private static final String[] XTST_NAMES = {"libXtst.so.6", "libXtst.so"};
+
+    /** libX11 alone: enough to open a display and name keys. */
+    private static final class Core {
+        static final SymbolLookup LIB = load(X11_NAMES, "libX11");
+
+        static final MethodHandle X_OPEN_DISPLAY =
+                downcall(LIB, "XOpenDisplay", FunctionDescriptor.of(PTR, PTR));
+        static final MethodHandle X_CLOSE_DISPLAY =
+                downcall(LIB, "XCloseDisplay", FunctionDescriptor.of(INT, PTR));
+        static final MethodHandle X_FLUSH =
+                downcall(LIB, "XFlush", FunctionDescriptor.of(INT, PTR));
+        static final MethodHandle X_SYNC =
+                downcall(LIB, "XSync", FunctionDescriptor.of(INT, PTR, INT));
+        static final MethodHandle XKB_KEYCODE_TO_KEYSYM =
+                downcall(LIB, "XkbKeycodeToKeysym", FunctionDescriptor.of(LONG, PTR, INT, INT, INT));
+        static final MethodHandle X_KEYSYM_TO_STRING =
+                downcall(LIB, "XKeysymToString", FunctionDescriptor.of(PTR, LONG));
+        static final MethodHandle X_QUERY_EXTENSION =
+                downcall(LIB, "XQueryExtension", FunctionDescriptor.of(INT, PTR, PTR, PTR, PTR, PTR));
+        static final MethodHandle X_DEFAULT_ROOT_WINDOW =
+                downcall(LIB, "XDefaultRootWindow", FunctionDescriptor.of(LONG, PTR));
+        static final MethodHandle X_CONNECTION_NUMBER =
+                downcall(LIB, "XConnectionNumber", FunctionDescriptor.of(INT, PTR));
+        static final MethodHandle X_PENDING =
+                downcall(LIB, "XPending", FunctionDescriptor.of(INT, PTR));
+        static final MethodHandle X_NEXT_EVENT =
+                downcall(LIB, "XNextEvent", FunctionDescriptor.of(INT, PTR, PTR));
+        static final MethodHandle X_GET_EVENT_DATA =
+                downcall(LIB, "XGetEventData", FunctionDescriptor.of(INT, PTR, PTR));
+        static final MethodHandle X_FREE_EVENT_DATA =
+                downcall(LIB, "XFreeEventData", FunctionDescriptor.ofVoid(PTR, PTR));
+    }
+
+    /** XInput2, which ships separately in libXi. */
+    private static final class Input {
+        static final SymbolLookup LIB = load(XI_NAMES, "libXi");
+
+        static final MethodHandle XI_QUERY_VERSION =
+                downcall(LIB, "XIQueryVersion", FunctionDescriptor.of(INT, PTR, PTR, PTR));
+        static final MethodHandle XI_SELECT_EVENTS =
+                downcall(LIB, "XISelectEvents", FunctionDescriptor.of(INT, PTR, LONG, PTR, INT));
+        static final MethodHandle XI_QUERY_DEVICE =
+                downcall(LIB, "XIQueryDevice", FunctionDescriptor.of(PTR, PTR, INT, PTR));
+        static final MethodHandle XI_FREE_DEVICE_INFO =
+                downcall(LIB, "XIFreeDeviceInfo", FunctionDescriptor.ofVoid(PTR));
+    }
+
+    /** {@code poll(2)}, so the event loop can wait on the X socket and still be woken. */
+    private static final class Poll {
+        static final MethodHandle POLL = LINKER.downcallHandle(
+                LINKER.defaultLookup().find("poll").orElseThrow(() ->
+                        new UnsatisfiedLinkError("unresolved symbol poll")),
+                FunctionDescriptor.of(INT, PTR, LONG, INT));
+    }
+
+    /** {@code struct pollfd} is an int and two shorts, and {@code POLLIN} is bit 0. */
+    private static final long POLLFD_SIZE = 8;
+    private static final long POLLFD_EVENTS = 4;
+    private static final short POLLIN = 1;
+
+    /** The RECORD extension, which ships separately in libXtst. */
+    private static final class Record {
+        static final SymbolLookup LIB = load(XTST_NAMES, "libXtst");
+
+        static final MethodHandle QUERY_VERSION =
+                downcall(LIB, "XRecordQueryVersion", FunctionDescriptor.of(INT, PTR, PTR, PTR));
+        static final MethodHandle ALLOC_RANGE =
+                downcall(LIB, "XRecordAllocRange", FunctionDescriptor.of(PTR));
+        static final MethodHandle CREATE_CONTEXT =
+                downcall(LIB, "XRecordCreateContext",
+                        FunctionDescriptor.of(LONG, PTR, INT, PTR, INT, PTR, INT));
+        static final MethodHandle ENABLE_CONTEXT =
+                downcall(LIB, "XRecordEnableContext", FunctionDescriptor.of(INT, PTR, LONG, PTR, PTR));
+        static final MethodHandle DISABLE_CONTEXT =
+                downcall(LIB, "XRecordDisableContext", FunctionDescriptor.of(INT, PTR, LONG));
+        static final MethodHandle FREE_CONTEXT =
+                downcall(LIB, "XRecordFreeContext", FunctionDescriptor.of(INT, PTR, LONG));
+        static final MethodHandle FREE_DATA =
+                downcall(LIB, "XRecordFreeData", FunctionDescriptor.ofVoid(PTR));
+    }
+
+    private static SymbolLookup load(String[] names, String what) {
+        IllegalArgumentException last = null;
+        for (String name : names) {
+            try {
+                return SymbolLookup.libraryLookup(name, Arena.global());
+            } catch (IllegalArgumentException e) {
+                last = e;
+            }
+        }
+        throw (last != null) ? last : new IllegalArgumentException(what + " not found");
+    }
+
+    private static MethodHandle downcall(SymbolLookup lookup, String symbol,
+                                         FunctionDescriptor descriptor) {
+        return LINKER.downcallHandle(
+                lookup.find(symbol).orElseThrow(() ->
+                        new UnsatisfiedLinkError("unresolved symbol " + symbol)),
+                descriptor);
+    }
+
+    /** The C signature of {@code XRecordInterceptProc}. */
+    static final FunctionDescriptor INTERCEPT_PROC = FunctionDescriptor.ofVoid(PTR, PTR);
+
+    /** Whether libX11 loaded, which is all that naming keys needs. */
+    static boolean isCoreAvailable() {
+        try {
+            return Core.LIB != null;
+        } catch (Throwable t) {
+            return false;
+        }
+    }
+
+    static boolean isAvailable() {
+        try {
+            return Core.LIB != null && Record.LIB != null;
+        } catch (Throwable t) {
+            return false;
+        }
+    }
+
+    /** Whether libX11 and libXi both loaded, which is what the XInput2 hook needs. */
+    static boolean isInputAvailable() {
+        try {
+            return Core.LIB != null && Input.LIB != null && Poll.POLL != null;
+        } catch (Throwable t) {
+            return false;
+        }
+    }
+
+    static MemorySegment openDisplay() {
+        return (MemorySegment) call(Core.X_OPEN_DISPLAY, MemorySegment.NULL);
+    }
+
+    static void closeDisplay(MemorySegment display) {
+        call(Core.X_CLOSE_DISPLAY, display);
+    }
+
+    static void flush(MemorySegment display) {
+        call(Core.X_FLUSH, display);
+    }
+
+    /** Flushes and waits for the server to have processed everything sent so far. */
+    static void sync(MemorySegment display) {
+        call(Core.X_SYNC, display, 0);
+    }
+
+    /** @return whether the server has the RECORD extension */
+    static boolean queryRecordVersion(MemorySegment display, Arena arena) {
+        MemorySegment major = arena.allocate(INT);
+        MemorySegment minor = arena.allocate(INT);
+        return (int) call(Record.QUERY_VERSION, display, major, minor) != 0;
+    }
+
+    static MemorySegment allocRange() {
+        return (MemorySegment) call(Record.ALLOC_RANGE);
+    }
+
+    static long createContext(MemorySegment display, MemorySegment clients, int clientCount,
+                              MemorySegment ranges, int rangeCount) {
+        return (long) call(Record.CREATE_CONTEXT, display, 0, clients, clientCount, ranges, rangeCount);
+    }
+
+    static int enableContext(MemorySegment display, long context, MemorySegment callback) {
+        return (int) call(Record.ENABLE_CONTEXT, display, context, callback, MemorySegment.NULL);
+    }
+
+    static void disableContext(MemorySegment display, long context) {
+        call(Record.DISABLE_CONTEXT, display, context);
+    }
+
+    static void freeContext(MemorySegment display, long context) {
+        call(Record.FREE_CONTEXT, display, context);
+    }
+
+    static void freeData(MemorySegment data) {
+        call(Record.FREE_DATA, data);
+    }
+
+    /** @return the extension's major opcode, or -1 when the server does not have it */
+    static int queryExtension(MemorySegment display, String name, Arena arena) {
+        MemorySegment opcode = arena.allocate(INT);
+        MemorySegment event = arena.allocate(INT);
+        MemorySegment error = arena.allocate(INT);
+        int found = (int) call(Core.X_QUERY_EXTENSION, display, arena.allocateFrom(name),
+                opcode, event, error);
+        return found != 0 ? opcode.get(INT, 0) : -1;
+    }
+
+    /** @return whether the server speaks at least XInput 2.0 */
+    static boolean queryInputVersion(MemorySegment display, Arena arena) {
+        MemorySegment major = arena.allocate(INT);
+        MemorySegment minor = arena.allocate(INT);
+        major.set(INT, 0, 2);
+        minor.set(INT, 0, 0);
+        // Success is 0; anything else means the server would not agree on 2.x.
+        return (int) call(Input.XI_QUERY_VERSION, display, major, minor) == 0;
+    }
+
+    static long defaultRootWindow(MemorySegment display) {
+        return (long) call(Core.X_DEFAULT_ROOT_WINDOW, display);
+    }
+
+    /**
+     * Asks for the events set in {@code bits} on {@code window}, once per device in
+     * {@code deviceIds}: selecting against {@code XIAllMasterDevices} itself does not
+     * reliably deliver every raw event type, so callers resolve it to real device ids first
+     * with {@link #queryMasterDeviceIds}.
+     */
+    static void selectInputEvents(MemorySegment display, long window, int[] deviceIds,
+                                   MemorySegment bits, int maskLen, Arena arena) {
+        MemorySegment masks = arena.allocate(EVENT_MASK_SIZE * deviceIds.length);
+        for (int i = 0; i < deviceIds.length; i++) {
+            long base = i * EVENT_MASK_SIZE;
+            masks.set(INT, base + EVENT_MASK_DEVICEID, deviceIds[i]);
+            masks.set(INT, base + EVENT_MASK_LEN, maskLen);
+            masks.set(PTR, base + EVENT_MASK_MASK, bits);
+        }
+        call(Input.XI_SELECT_EVENTS, display, window, masks, deviceIds.length);
+    }
+
+    /**
+     * The real device ids behind the {@code XIAllMasterDevices} pseudo-device — selecting
+     * raw events against each one individually, rather than the pseudo-device itself, is
+     * the more correct form (some drivers reportedly need it), even though it alone does
+     * not fix the {@code XI_RawButtonRelease} gap {@link XInput2InputHook} documents.
+     */
+    static int[] queryMasterDeviceIds(MemorySegment display, Arena arena) {
+        MemorySegment count = arena.allocate(INT);
+        MemorySegment infos = (MemorySegment) call(Input.XI_QUERY_DEVICE, display,
+                XI_ALL_MASTER_DEVICES, count);
+        int n = count.get(INT, 0);
+        if (infos.equals(MemorySegment.NULL) || n <= 0) return new int[0];
+        try {
+            MemorySegment array = infos.reinterpret(DEVICE_INFO_SIZE * n);
+            int[] ids = new int[n];
+            for (int i = 0; i < n; i++) {
+                ids[i] = array.get(INT, i * DEVICE_INFO_SIZE + DEVICE_INFO_DEVICEID);
+            }
+            return ids;
+        } finally {
+            call(Input.XI_FREE_DEVICE_INFO, infos);
+        }
+    }
+
+    static int pending(MemorySegment display) {
+        return (int) call(Core.X_PENDING, display);
+    }
+
+    static void nextEvent(MemorySegment display, MemorySegment event) {
+        call(Core.X_NEXT_EVENT, display, event);
+    }
+
+    /** Fetches a generic event's payload; the caller must free it when this succeeds. */
+    static boolean getEventData(MemorySegment display, MemorySegment cookie) {
+        return (int) call(Core.X_GET_EVENT_DATA, display, cookie) != 0;
+    }
+
+    static void freeEventData(MemorySegment display, MemorySegment cookie) {
+        call(Core.X_FREE_EVENT_DATA, display, cookie);
+    }
+
+    /**
+     * A {@code struct pollfd} watching the display connection, to be allocated once and
+     * handed to {@link #awaitEvent} for the life of an event loop.
+     */
+    static MemorySegment pollFd(MemorySegment display, Arena arena) {
+        MemorySegment fds = arena.allocate(POLLFD_SIZE);
+        fds.set(INT, 0, (int) call(Core.X_CONNECTION_NUMBER, display));
+        fds.set(ValueLayout.JAVA_SHORT, POLLFD_EVENTS, POLLIN);
+        return fds;
+    }
+
+    /**
+     * Waits until the connection has something to read or the timeout runs out, so an
+     * event loop can stay asleep yet still notice it has been asked to stop.
+     */
+    static void awaitEvent(MemorySegment pollFd, int timeoutMillis) {
+        call(Poll.POLL, pollFd, 1L, timeoutMillis);
+    }
+
+    /** The unshifted keysym of a keycode in the first group, or 0 when unbound. */
+    static long keysym(MemorySegment display, int keycode) {
+        return (long) call(Core.XKB_KEYCODE_TO_KEYSYM, display, keycode, 0, 0);
+    }
+
+    /** The keysym's X name ("a", "Control_L", "F5"), or {@code null}. */
+    static String keysymName(long keysym) {
+        MemorySegment name = (MemorySegment) call(Core.X_KEYSYM_TO_STRING, keysym);
+        if (name == null || name.equals(MemorySegment.NULL)) return null;
+        return name.reinterpret(Long.MAX_VALUE).getString(0, StandardCharsets.US_ASCII);
+    }
+
+    private static Object call(MethodHandle handle, Object... args) {
+        try {
+            return handle.invokeWithArguments(args);
+        } catch (Throwable t) {
+            throw new IllegalStateException("X11 call failed", t);
+        }
+    }
+}

ts3-client/desktop/src/test/java/com/ts3client/hotkey/desktop/RawInputTest.java

@@ -0,0 +1,92 @@
+package com.ts3client.hotkey.desktop;
+
+import com.ts3client.hotkey.HotkeyKey;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/** Decoding of Windows raw input, which needs no Windows to check. */
+class RawInputTest {
+
+    @Test
+    void plainKeyKeepsItsScanCode() {
+        // 'A' is scan code 0x1E, no escape.
+        assertEquals(0x1E, RawInput.scanCode(0x1E, 0, 0x41));
+    }
+
+    @Test
+    void escapedKeysStayDistinctFromTheirUnescapedTwins() {
+        // Left Ctrl is 1D; right Ctrl is E0 1D, and the two must not collide.
+        int left = RawInput.scanCode(0x1D, 0, 0xA2);
+        int right = RawInput.scanCode(0x1D, RawInput.RI_KEY_E0, 0xA3);
+        assertEquals(0x1D, left);
+        assertEquals(0xE01D, right);
+    }
+
+    @Test
+    void pauseUsesTheOtherEscape() {
+        assertEquals(0xE11D, RawInput.scanCode(0x1D, RawInput.RI_KEY_E1, 0x13));
+    }
+
+    @Test
+    void fillerHalfOfAnEscapedSequenceIsIgnored() {
+        assertEquals(-1, RawInput.scanCode(0x2A, RawInput.RI_KEY_E0, 0xFF));
+        assertEquals(-1, RawInput.scanCode(0, 0, 0x41));
+    }
+
+    @Test
+    void breakFlagMarksTheRelease() {
+        assertFalse(RawInput.isRelease(0));
+        assertTrue(RawInput.isRelease(RawInput.RI_KEY_BREAK));
+        assertTrue(RawInput.isRelease(RawInput.RI_KEY_BREAK | RawInput.RI_KEY_E0));
+    }
+
+    @Test
+    void sideButtonsMapToTheNumbersUsersKnow() {
+        // X1 down: "Mouse 4" everywhere else in the client, X button 8.
+        List<RawInput.ButtonEvent> down = RawInput.buttons(0x0040, (short) 0);
+        assertEquals(List.of(new RawInput.ButtonEvent(HotkeyKey.mouse(8), true)), down);
+        assertEquals("Mouse 4", HotkeyKey.mouse(8).fallbackName());
+
+        List<RawInput.ButtonEvent> up = RawInput.buttons(0x0200, (short) 0);
+        assertEquals(List.of(new RawInput.ButtonEvent(HotkeyKey.mouse(9), false)), up);
+        assertEquals("Mouse 5", HotkeyKey.mouse(9).fallbackName());
+    }
+
+    @Test
+    void primaryButtonsUseTheXNumbering() {
+        assertEquals(List.of(new RawInput.ButtonEvent(HotkeyKey.mouse(1), true)),
+                RawInput.buttons(0x0001, (short) 0));
+        assertEquals(List.of(new RawInput.ButtonEvent(HotkeyKey.mouse(2), true)),
+                RawInput.buttons(0x0010, (short) 0));
+        assertEquals(List.of(new RawInput.ButtonEvent(HotkeyKey.mouse(3), true)),
+                RawInput.buttons(0x0004, (short) 0));
+    }
+
+    @Test
+    void oneEventCanCarrySeveralTransitions() {
+        // Left up and right down in the same report.
+        assertEquals(List.of(new RawInput.ButtonEvent(HotkeyKey.mouse(1), false),
+                        new RawInput.ButtonEvent(HotkeyKey.mouse(3), true)),
+                RawInput.buttons(0x0002 | 0x0004, (short) 0));
+    }
+
+    @Test
+    void wheelBecomesATapSoTheEngineSeesBothEdges() {
+        assertEquals(List.of(new RawInput.ButtonEvent(HotkeyKey.mouse(4), true),
+                        new RawInput.ButtonEvent(HotkeyKey.mouse(4), false)),
+                RawInput.buttons(0x0400, (short) 120));
+        assertEquals(List.of(new RawInput.ButtonEvent(HotkeyKey.mouse(5), true),
+                        new RawInput.ButtonEvent(HotkeyKey.mouse(5), false)),
+                RawInput.buttons(0x0400, (short) -120));
+    }
+
+    @Test
+    void mouseMovementAloneReportsNothing() {
+        assertEquals(List.of(), RawInput.buttons(0, (short) 0));
+    }
+}

ts3-client/pom.xml

@@ -23,6 +23,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <ts3j.version>1.0.3</ts3j.version>
         <jsvg.version>2.1.0</jsvg.version>
+        <flatlaf.version>3.7.2</flatlaf.version>
         <surefire.version>3.5.6</surefire.version>
     </properties>
 
@@ -50,6 +51,11 @@
                 <artifactId>jsvg</artifactId>
                 <version>${jsvg.version}</version>
             </dependency>
+            <dependency>
+                <groupId>com.formdev</groupId>
+                <artifactId>flatlaf</artifactId>
+                <version>${flatlaf.version}</version>
+            </dependency>
             <dependency>
                 <groupId>com.ts3client</groupId>
                 <artifactId>ts3-client-core</artifactId>

ts3-client/swing/pom.xml

@@ -35,6 +35,16 @@
             <groupId>com.github.weisj</groupId>
             <artifactId>jsvg</artifactId>
         </dependency>
+        <dependency>
+            <groupId>com.formdev</groupId>
+            <artifactId>flatlaf</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>5.13.4</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -78,6 +88,15 @@
                                         <include>**</include>
                                     </includes>
                                 </filter>
+                                <!-- FlatLaf instantiates its UI delegates by name and reads its
+                                     themes from .properties resources; neither is reachable
+                                     statically, so minimizeJar must not touch it. -->
+                                <filter>
+                                    <artifact>com.formdev:flatlaf</artifact>
+                                    <includes>
+                                        <include>**</include>
+                                    </includes>
+                                </filter>
                                 <filter>
                                     <artifact>*:*</artifact>
                                     <excludes>

ts3-client/swing/src/main/java/com/ts3client/Main.java

@@ -2,14 +2,14 @@ package com.ts3client;
 
 import com.ts3client.config.Settings;
 import com.ts3client.ui.IconTheme;
+import com.ts3client.ui.LookAndFeelManager;
 import com.ts3client.ui.MainFrame;
 
 import javax.swing.SwingUtilities;
-import javax.swing.UIManager;
 
 /**
- * Application entry point. Loads settings, applies the system look-and-feel and
- * shows the main window on the Swing event dispatch thread.
+ * Application entry point. Loads settings, installs the look-and-feel and shows the
+ * main window on the Swing event dispatch thread.
  */
 public final class Main {
 
@@ -23,11 +23,7 @@ public final class Main {
         final Settings settings = Settings.load();
 
         SwingUtilities.invokeLater(() -> {
-            try {
-                UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
-            } catch (Exception ignored) {
-                // fall back to cross-platform L&F
-            }
+            LookAndFeelManager.install(settings.appearance);
             IconTheme.get().reload(settings);
             new MainFrame(settings).setVisible(true);
         });

ts3-client/swing/src/main/java/com/ts3client/ui/ChannelAdvancedPanel.java

@@ -0,0 +1,200 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.ChannelSettings;
+
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.ButtonGroup;
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JRadioButton;
+import javax.swing.JSpinner;
+import javax.swing.JTextField;
+import javax.swing.SpinnerNumberModel;
+import java.awt.Dimension;
+import java.awt.FlowLayout;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+
+/**
+ * The channel editor's "Advanced" tab: the phonetic name, the delete delay of a temporary
+ * channel, voice encryption, and the two client limits.
+ */
+final class ChannelAdvancedPanel extends JPanel implements ChannelDialog.Tab {
+
+    /** TeamSpeak's ceiling for {@code channel_delete_delay}, in seconds. */
+    private static final int MAX_DELETE_DELAY = 604800;
+
+    private final JTextField phoneticName = new JTextField();
+    private final JSpinner deleteDelay =
+            Spinners.compact(new JSpinner(new SpinnerNumberModel(0, 0, MAX_DELETE_DELAY, 1)));
+    private final JButton deleteDelayMax = new JButton("max");
+    private final JCheckBox encrypted = new JCheckBox("Voice Data encrypted");
+
+    private final JRadioButton maxUsersUnlimited = new JRadioButton("Unlimited");
+    private final JRadioButton maxUsersLimited = new JRadioButton("Limited");
+    private final JSpinner maxUsers = Spinners.compact(new JSpinner(new SpinnerNumberModel(16, 0, 65535, 1)));
+
+    private final JRadioButton familyInherited = new JRadioButton("Inherited");
+    private final JRadioButton familyUnlimited = new JRadioButton("Unlimited");
+    private final JRadioButton familyLimited = new JRadioButton("Limited");
+    private final JSpinner familyMaxUsers =
+            Spinners.compact(new JSpinner(new SpinnerNumberModel(16, 0, 65535, 1)));
+
+    ChannelAdvancedPanel() {
+        setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
+        setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
+
+        phoneticName.setToolTipText("Set phonetic nickname used for this channel by text-to-speech.");
+        deleteDelay.setToolTipText("<html><p>Delay in seconds after temporary channels are deleted"
+                + " after the last user left the channel.</p></html>");
+        deleteDelayMax.setToolTipText("Set delete delay to maximum value");
+        deleteDelayMax.addActionListener(a -> deleteDelay.setValue(MAX_DELETE_DELAY));
+        encrypted.setToolTipText("Voice data in this channel will be encrypted.");
+
+        ButtonGroup users = new ButtonGroup();
+        users.add(maxUsersUnlimited);
+        users.add(maxUsersLimited);
+        maxUsersUnlimited.setToolTipText("Unlimited number of clients can join this channel.");
+        maxUsersLimited.setToolTipText("Limit number of clients in this channel.");
+        maxUsersUnlimited.addActionListener(a -> syncLimits());
+        maxUsersLimited.addActionListener(a -> syncLimits());
+
+        ButtonGroup family = new ButtonGroup();
+        family.add(familyInherited);
+        family.add(familyUnlimited);
+        family.add(familyLimited);
+        familyInherited.setToolTipText("Inherit the client limit by parent channel.");
+        familyUnlimited.setToolTipText("The channel subtree can be joined by unlimited number of clients.");
+        familyLimited.setToolTipText("Limit the number of clients in the channel subtree.");
+        for (JRadioButton radio : new JRadioButton[]{familyInherited, familyUnlimited, familyLimited}) {
+            radio.addActionListener(a -> syncLimits());
+        }
+
+        JPanel other = otherSettings();
+        other.setAlignmentX(0f);
+        fixHeight(other);
+        add(other);
+        add(Box.createVerticalStrut(6));
+
+        JPanel limits = new JPanel();
+        limits.setLayout(new BoxLayout(limits, BoxLayout.X_AXIS));
+        limits.add(limitBox("Max Users", new JRadioButton[]{maxUsersUnlimited, maxUsersLimited}, maxUsers));
+        limits.add(Box.createHorizontalStrut(8));
+        limits.add(limitBox("Family Max Users",
+                new JRadioButton[]{familyInherited, familyUnlimited, familyLimited}, familyMaxUsers));
+        limits.setAlignmentX(0f);
+        fixHeight(limits);
+        add(limits);
+        add(Box.createVerticalGlue());
+    }
+
+    /** The delete delay only means anything for a channel that disappears on its own. */
+    void setChannelType(ChannelSettings.Type type) {
+        boolean temporary = type == ChannelSettings.Type.TEMPORARY;
+        deleteDelay.setEnabled(temporary);
+        deleteDelayMax.setEnabled(temporary);
+    }
+
+    @Override
+    public void read(ChannelSettings settings) {
+        phoneticName.setText(settings.phoneticName);
+        deleteDelay.setValue(Math.min(MAX_DELETE_DELAY, Math.max(0, settings.deleteDelay)));
+        encrypted.setSelected(settings.encrypted);
+
+        if (settings.maxClientsUnlimited) maxUsersUnlimited.setSelected(true);
+        else maxUsersLimited.setSelected(true);
+        maxUsers.setValue(settings.maxClients);
+
+        if (settings.familyInherited) familyInherited.setSelected(true);
+        else if (settings.familyUnlimited) familyUnlimited.setSelected(true);
+        else familyLimited.setSelected(true);
+        familyMaxUsers.setValue(settings.maxFamilyClients);
+
+        setChannelType(settings.type);
+        syncLimits();
+    }
+
+    @Override
+    public void write(ChannelSettings settings) {
+        settings.phoneticName = phoneticName.getText();
+        settings.deleteDelay = (Integer) deleteDelay.getValue();
+        settings.encrypted = encrypted.isSelected();
+        settings.maxClientsUnlimited = maxUsersUnlimited.isSelected();
+        settings.maxClients = (Integer) maxUsers.getValue();
+        settings.familyInherited = familyInherited.isSelected();
+        settings.familyUnlimited = familyUnlimited.isSelected();
+        settings.maxFamilyClients = (Integer) familyMaxUsers.getValue();
+    }
+
+    private void syncLimits() {
+        maxUsers.setEnabled(maxUsersLimited.isSelected());
+        familyMaxUsers.setEnabled(familyLimited.isSelected());
+    }
+
+    private JPanel otherSettings() {
+        JPanel panel = new JPanel(new GridBagLayout());
+        panel.setBorder(BorderFactory.createTitledBorder("Other Settings"));
+        GridBagConstraints c = new GridBagConstraints();
+        c.insets = new Insets(3, 4, 3, 4);
+        c.anchor = GridBagConstraints.WEST;
+        c.fill = GridBagConstraints.HORIZONTAL;
+
+        c.gridx = 0;
+        c.gridy = 0;
+        panel.add(new JLabel("Phonetic Name:"), c);
+        c.gridx = 1;
+        c.weightx = 1;
+        panel.add(phoneticName, c);
+
+        c.gridx = 0;
+        c.gridy = 1;
+        c.weightx = 0;
+        panel.add(new JLabel("Delete delay:"), c);
+        JPanel delay = new JPanel(new FlowLayout(FlowLayout.LEFT, 4, 0));
+        delay.add(deleteDelay);
+        delay.add(deleteDelayMax);
+        c.gridx = 1;
+        c.weightx = 1;
+        panel.add(delay, c);
+
+        c.gridx = 1;
+        c.gridy = 2;
+        panel.add(encrypted, c);
+        return panel;
+    }
+
+    /**
+     * A limit box: its choices stacked, with the count beside the last of them —
+     * "Limited", the only choice it belongs to.
+     */
+    private JPanel limitBox(String title, JRadioButton[] choices, JSpinner spinner) {
+        JPanel box = new JPanel();
+        box.setLayout(new BoxLayout(box, BoxLayout.Y_AXIS));
+        box.setBorder(BorderFactory.createTitledBorder(title));
+        for (int i = 0; i < choices.length; i++) {
+            JRadioButton radio = choices[i];
+            radio.setAlignmentX(0f);
+            if (i < choices.length - 1) {
+                box.add(radio);
+                continue;
+            }
+            JPanel row = new JPanel(new FlowLayout(FlowLayout.LEFT, 6, 0));
+            row.setAlignmentX(0f);
+            row.add(radio);
+            row.add(spinner);
+            box.add(row);
+        }
+        box.add(Box.createVerticalGlue());
+        return box;
+    }
+
+    /** Keeps a section at its natural height, so the free space collects at the bottom. */
+    private static void fixHeight(JPanel panel) {
+        panel.setMaximumSize(new Dimension(Integer.MAX_VALUE, panel.getPreferredSize().height));
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/ChannelAudioPanel.java

@@ -0,0 +1,166 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.ChannelSettings;
+
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.ButtonGroup;
+import javax.swing.JComboBox;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JRadioButton;
+import javax.swing.JSlider;
+import java.awt.BorderLayout;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+
+/**
+ * The channel editor's "Audio" tab: the codec preset, or the codec and quality picked by
+ * hand, with the bandwidth one talking client then costs.
+ */
+final class ChannelAudioPanel extends JPanel implements ChannelDialog.Tab {
+
+    /** Codec names in TeamSpeak's own id order, which is what the combo box index is. */
+    private static final String[] CODEC_NAMES = {
+            "Speex Narrowband", "Speex Wideband", "Speex Ultra-Wideband",
+            "CELT Mono", "Opus Voice", "Opus Music"};
+
+    /**
+     * Bandwidth per talking client in KiB/s at quality 0 and 10, per codec, as published by
+     * TeamSpeak. The steps in between are interpolated: the client shows a figure per
+     * quality step, and only the two ends of each codec's range are documented.
+     */
+    private static final double[][] BANDWIDTH_RANGE = {
+            {2.49, 5.22}, {2.69, 7.37}, {2.73, 7.57}, {6.10, 13.92}, {2.73, 7.71}, {3.08, 11.87}};
+
+    private static final int CODEC_OPUS_VOICE = 4;
+    private static final int CODEC_OPUS_MUSIC = 5;
+
+    private final JRadioButton voiceMobile = new JRadioButton("Voice Mobile");
+    private final JRadioButton voiceDesktop = new JRadioButton("Voice Desktop");
+    private final JRadioButton music = new JRadioButton("Music");
+    private final JRadioButton custom = new JRadioButton("Custom");
+    private final JComboBox<String> codec = new JComboBox<>(CODEC_NAMES);
+    private final JSlider quality = new JSlider(0, 10, 6);
+    private final JLabel qualityValue = new JLabel("6");
+    private final JLabel bandwidth = new JLabel();
+    private final JPanel customSettings = new JPanel(new GridBagLayout());
+
+    ChannelAudioPanel() {
+        super(new BorderLayout(8, 8));
+        setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
+
+        ButtonGroup presets = new ButtonGroup();
+        presets.add(voiceMobile);
+        presets.add(voiceDesktop);
+        presets.add(music);
+        presets.add(custom);
+        voiceMobile.addActionListener(a -> applyPreset(CODEC_OPUS_VOICE, 4));
+        voiceDesktop.addActionListener(a -> applyPreset(CODEC_OPUS_VOICE, 6));
+        music.addActionListener(a -> applyPreset(CODEC_OPUS_MUSIC, 6));
+        custom.addActionListener(a -> setCustomEnabled(true));
+
+        codec.addActionListener(a -> updateBandwidth());
+        quality.setMajorTickSpacing(1);
+        quality.setPaintTicks(true);
+        quality.setSnapToTicks(true);
+        quality.addChangeListener(e -> updateBandwidth());
+
+        add(presetBox(), BorderLayout.WEST);
+        add(customBox(), BorderLayout.CENTER);
+        add(bandwidthRow(), BorderLayout.SOUTH);
+    }
+
+    @Override
+    public void read(ChannelSettings settings) {
+        codec.setSelectedIndex(Math.max(0, Math.min(CODEC_NAMES.length - 1, settings.codec)));
+        quality.setValue(Math.max(0, Math.min(10, settings.codecQuality)));
+        if (settings.codec == CODEC_OPUS_VOICE && settings.codecQuality == 4) voiceMobile.setSelected(true);
+        else if (settings.codec == CODEC_OPUS_VOICE && settings.codecQuality == 6) voiceDesktop.setSelected(true);
+        else if (settings.codec == CODEC_OPUS_MUSIC && settings.codecQuality == 6) music.setSelected(true);
+        else custom.setSelected(true);
+        setCustomEnabled(custom.isSelected());
+        updateBandwidth();
+    }
+
+    @Override
+    public void write(ChannelSettings settings) {
+        settings.codec = codec.getSelectedIndex();
+        settings.codecQuality = quality.getValue();
+    }
+
+    private void applyPreset(int codecId, int qualityValue) {
+        codec.setSelectedIndex(codecId);
+        quality.setValue(qualityValue);
+        setCustomEnabled(false);
+        updateBandwidth();
+    }
+
+    private void setCustomEnabled(boolean enabled) {
+        customSettings.setEnabled(enabled);
+        for (java.awt.Component child : customSettings.getComponents()) child.setEnabled(enabled);
+    }
+
+    private void updateBandwidth() {
+        qualityValue.setText(Integer.toString(quality.getValue()));
+        int index = Math.max(0, Math.min(BANDWIDTH_RANGE.length - 1, codec.getSelectedIndex()));
+        double[] range = BANDWIDTH_RANGE[index];
+        double value = range[0] + (range[1] - range[0]) * quality.getValue() / 10.0;
+        bandwidth.setText(String.format("%.2f KiB/s", value));
+    }
+
+    private JPanel presetBox() {
+        JPanel box = new JPanel();
+        box.setLayout(new BoxLayout(box, BoxLayout.Y_AXIS));
+        box.setBorder(BorderFactory.createTitledBorder("Presets"));
+        for (JRadioButton radio : new JRadioButton[]{voiceMobile, voiceDesktop, music, custom}) {
+            radio.setAlignmentX(0f);
+            box.add(radio);
+        }
+        box.add(Box.createVerticalGlue());
+        return box;
+    }
+
+    private JPanel customBox() {
+        customSettings.setBorder(BorderFactory.createTitledBorder("Custom Settings"));
+        GridBagConstraints c = new GridBagConstraints();
+        c.insets = new Insets(4, 4, 4, 4);
+        c.anchor = GridBagConstraints.WEST;
+        c.fill = GridBagConstraints.HORIZONTAL;
+
+        c.gridx = 0;
+        c.gridy = 0;
+        customSettings.add(new JLabel("Codec:"), c);
+        c.gridx = 1;
+        c.weightx = 1;
+        c.gridwidth = 2;
+        customSettings.add(codec, c);
+
+        c.gridwidth = 1;
+        c.gridx = 0;
+        c.gridy = 1;
+        c.weightx = 0;
+        customSettings.add(new JLabel("Quality:"), c);
+        c.gridx = 1;
+        c.weightx = 1;
+        customSettings.add(quality, c);
+        c.gridx = 2;
+        c.weightx = 0;
+        customSettings.add(qualityValue, c);
+
+        c.gridx = 0;
+        c.gridy = 2;
+        c.weighty = 1;
+        customSettings.add(Box.createVerticalGlue(), c);
+        return customSettings;
+    }
+
+    private JPanel bandwidthRow() {
+        JPanel row = new JPanel(new BorderLayout(6, 0));
+        row.add(new JLabel("Bandwidth usage:"), BorderLayout.WEST);
+        row.add(bandwidth, BorderLayout.CENTER);
+        return row;
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/ChannelDialog.java

@@ -0,0 +1,433 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.ChannelNode;
+import com.ts3client.net.ChannelSettings;
+import com.ts3client.net.TeamspeakConnection;
+
+import javax.swing.BorderFactory;
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+import javax.swing.JDialog;
+import javax.swing.JLabel;
+import javax.swing.JMenuItem;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JPasswordField;
+import javax.swing.JPopupMenu;
+import javax.swing.JScrollPane;
+import javax.swing.JTabbedPane;
+import javax.swing.JTextArea;
+import javax.swing.JTextField;
+import javax.swing.SwingUtilities;
+import javax.swing.Timer;
+import javax.swing.event.DocumentEvent;
+import javax.swing.event.DocumentListener;
+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+import java.awt.Window;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * TeamSpeak's channel editor: the channel's name, icon, password, topic and description
+ * above four tabs holding everything else. The official client uses the same dialog to
+ * create a channel and to edit one, and so does this.
+ *
+ * <p>When editing, the channel's properties are not in the tree model — the tree only
+ * carries what the server pushes for display — so the dialog opens empty and fills itself
+ * from a {@code channelinfo}, with its own permissions arriving separately. Saving sends
+ * only what was actually changed, because a {@code channeledit} carrying one property the
+ * client may not modify is refused as a whole.
+ *
+ * <p>When creating, there is nothing to read: the dialog starts from the defaults its
+ * caller chose and sends a {@code channelcreate} carrying whatever deviates from a plain
+ * new channel, for the same reason.
+ */
+final class ChannelDialog extends JDialog {
+
+    /** A tab that maps a part of the channel's settings onto its controls. */
+    interface Tab {
+        void read(ChannelSettings settings);
+
+        void write(ChannelSettings settings);
+    }
+
+    /** How long, and how often, to keep looking for a channel icon that is still downloading. */
+    private static final int ICON_RETRY_MS = 500;
+    private static final int ICON_RETRIES = 20;
+
+    /** What the password field shows for an existing password, which is never readable. */
+    private static final String PASSWORD_PLACEHOLDER = "••••••••";
+
+    private static final String NAME_TOOLTIP = "<html>Name of this channel displayed in the tree."
+            + "<table>"
+            + "<tr><td style='white-space:nowrap'>Syntax: \"<strong>[?Spacer#]Text</strong>\"</td></tr>"
+            + "<tr><td style='white-space:nowrap'>Where \"?\" stands for an alignment"
+            + " (r=right, c=center, l=left),</td></tr>"
+            + "<tr><td style='white-space:nowrap'>\"*\" will repeat the text to fill the whole line.</td></tr>"
+            + "<tr><td style='white-space:nowrap'>Change \"#\" to get a unique channel name.</td></tr>"
+            + "<tr><td style='white-space:nowrap'>[lSpacer0] a left aligned text</td></tr>"
+            + "<tr><td style='white-space:nowrap'>[cSpacer1] a centered text</td></tr>"
+            + "<tr><td style='white-space:nowrap'>[rSpacer2] a right aligned text</td></tr>"
+            + "<tr><td style='white-space:nowrap'>Use one of the three-character-blocks as text for a"
+            + " special spacer: \"---\", \"...\", \"-.-\", \"___\", \"-..\"</td></tr>"
+            + "</table></html>";
+
+    private final TeamspeakConnection conn;
+    private final GroupIcons groupIcons;
+    /** The channel being edited, or {@code null} when a new one is being created. */
+    private final ChannelNode channel;
+    /** Where a new channel goes; 0 is the top level. Unused when editing. */
+    private final int parentId;
+
+    private final JTextField name = new JTextField();
+    private final JPasswordField password = new JPasswordField();
+    private final JTextField topic = new JTextField();
+    private final JTextArea description = new JTextArea(5, 40);
+    private final JButton iconButton = new JButton();
+    private final JButton ok = new JButton("OK");
+
+    private final ChannelStandardPanel standardPanel;
+    private final ChannelAudioPanel audioPanel = new ChannelAudioPanel();
+    private final ChannelPermissionsPanel permissionsPanel = new ChannelPermissionsPanel();
+    private final ChannelAdvancedPanel advancedPanel = new ChannelAdvancedPanel();
+
+    /** The tabs backed by {@link ChannelSettings}; the permissions tab has its own source. */
+    private final List<Tab> settingsTabs;
+
+    /** The channel as the server last described it; the baseline every change is measured against. */
+    private ChannelSettings original;
+    private long iconId;
+    private boolean passwordEdited;
+
+    /** The editor for an existing channel. */
+    static ChannelDialog toEdit(Window owner, TeamspeakConnection conn, GroupIcons groupIcons,
+                                ChannelNode channel) {
+        return new ChannelDialog(owner, conn, groupIcons, "Edit Channel: " + channel.name,
+                channel, channel.parentId, null);
+    }
+
+    /**
+     * The editor for a channel that does not exist yet.
+     *
+     * @param parentId the channel it goes below, 0 being the top level
+     * @param defaults what the dialog opens with, e.g. the channel type its caller prefers
+     */
+    static ChannelDialog toCreate(Window owner, TeamspeakConnection conn, GroupIcons groupIcons,
+                                  String title, int parentId, ChannelSettings defaults) {
+        return new ChannelDialog(owner, conn, groupIcons, title, null, parentId, defaults);
+    }
+
+    private ChannelDialog(Window owner, TeamspeakConnection conn, GroupIcons groupIcons, String title,
+                          ChannelNode channel, int parentId, ChannelSettings defaults) {
+        super(owner, title, ModalityType.APPLICATION_MODAL);
+        this.conn = conn;
+        this.groupIcons = groupIcons;
+        this.channel = channel;
+        this.parentId = parentId;
+        this.standardPanel = new ChannelStandardPanel(channel != null
+                ? conn.getModel().siblingsOf(channel.id) : conn.getModel().childrenOf(parentId));
+
+        standardPanel.onTypeChanged(advancedPanel::setChannelType);
+        settingsTabs = List.of(standardPanel, audioPanel, advancedPanel);
+
+        JTabbedPane tabs = new JTabbedPane();
+        tabs.addTab("Standard", standardPanel);
+        tabs.addTab("Audio", audioPanel);
+        tabs.addTab("Permissions", permissionsPanel);
+        tabs.addTab("Advanced", advancedPanel);
+
+        // The tabs need no more than their natural height, so they sit at the bottom
+        // with the buttons and every spare pixel goes to the description instead.
+        JPanel bottom = new JPanel(new BorderLayout(0, 6));
+        bottom.add(tabs, BorderLayout.CENTER);
+        bottom.add(buttons(), BorderLayout.SOUTH);
+
+        getContentPane().setLayout(new BorderLayout(0, 6));
+        getContentPane().add(header(), BorderLayout.CENTER);
+        getContentPane().add(bottom, BorderLayout.SOUTH);
+
+        setEnabledForLoading(false);
+        Dialogs.closeOnEscape(this);
+        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
+        setSize(new Dimension(560, 620));
+        setMinimumSize(new Dimension(480, 520));
+        setLocationRelativeTo(owner);
+
+        if (channel != null) load();
+        else prepareNew(defaults);
+    }
+
+    // ---- layout ----
+
+    private JPanel header() {
+        JPanel panel = new JPanel(new GridBagLayout());
+        panel.setBorder(BorderFactory.createEmptyBorder(8, 8, 0, 8));
+        GridBagConstraints c = new GridBagConstraints();
+        c.insets = new Insets(3, 4, 3, 4);
+        c.anchor = GridBagConstraints.WEST;
+        c.fill = GridBagConstraints.HORIZONTAL;
+
+        name.setToolTipText(NAME_TOOLTIP);
+        password.setToolTipText("Optional password for this channel.");
+        topic.setToolTipText("Optional topic for this channel, displayed in the info area on the right.");
+        password.getDocument().addDocumentListener(new DocumentListener() {
+            @Override
+            public void insertUpdate(DocumentEvent e) {
+                passwordEdited = true;
+            }
+
+            @Override
+            public void removeUpdate(DocumentEvent e) {
+                passwordEdited = true;
+            }
+
+            @Override
+            public void changedUpdate(DocumentEvent e) {
+                passwordEdited = true;
+            }
+        });
+
+        c.gridx = 0;
+        c.gridy = 0;
+        panel.add(new JLabel("Name:"), c);
+        c.gridx = 1;
+        c.weightx = 1;
+        panel.add(name, c);
+        c.gridx = 2;
+        c.weightx = 0;
+        panel.add(iconField(), c);
+
+        c.gridx = 0;
+        c.gridy = 1;
+        panel.add(new JLabel("Password:"), c);
+        c.gridx = 1;
+        c.gridwidth = 2;
+        c.weightx = 1;
+        panel.add(password, c);
+
+        c.gridwidth = 1;
+        c.gridx = 0;
+        c.gridy = 2;
+        c.weightx = 0;
+        panel.add(new JLabel("Topic:"), c);
+        c.gridx = 1;
+        c.gridwidth = 2;
+        c.weightx = 1;
+        panel.add(topic, c);
+
+        c.gridwidth = 1;
+        c.gridx = 0;
+        c.gridy = 3;
+        c.weightx = 0;
+        panel.add(new JLabel("Description:"), c);
+        JButton popOut = new JButton("Edit…");
+        popOut.setToolTipText("Tear off description editor");
+        popOut.addActionListener(a -> editDescription());
+        c.gridx = 1;
+        c.gridwidth = 2;
+        c.fill = GridBagConstraints.NONE;
+        panel.add(popOut, c);
+
+        description.setLineWrap(true);
+        description.setWrapStyleWord(true);
+        c.gridx = 0;
+        c.gridy = 4;
+        c.gridwidth = 3;
+        c.weightx = 1;
+        c.weighty = 1;
+        c.fill = GridBagConstraints.BOTH;
+        panel.add(new JScrollPane(description), c);
+        return panel;
+    }
+
+    private JPanel iconField() {
+        iconButton.setToolTipText("Set channel icon.");
+        iconButton.setPreferredSize(new Dimension(26, 24));
+        iconButton.setMargin(new Insets(1, 1, 1, 1));
+        iconButton.addActionListener(a -> chooseIcon());
+        iconButton.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mousePressed(MouseEvent e) {
+                if (e.isPopupTrigger()) showIconMenu(e);
+            }
+
+            @Override
+            public void mouseReleased(MouseEvent e) {
+                if (e.isPopupTrigger()) showIconMenu(e);
+            }
+        });
+        JPanel row = new JPanel(new BorderLayout(4, 0));
+        row.add(new JLabel("Icon:"), BorderLayout.WEST);
+        row.add(iconButton, BorderLayout.CENTER);
+        return row;
+    }
+
+    private JPanel buttons() {
+        JButton cancel = new JButton("Cancel");
+        ok.addActionListener(a -> save());
+        cancel.addActionListener(a -> dispose());
+        JPanel panel = new JPanel(new BorderLayout());
+        panel.setBorder(BorderFactory.createEmptyBorder(0, 8, 8, 8));
+        JPanel right = new JPanel();
+        right.add(ok);
+        right.add(cancel);
+        panel.add(right, BorderLayout.EAST);
+        getRootPane().setDefaultButton(ok);
+        return panel;
+    }
+
+    // ---- loading ----
+
+    private void load() {
+        conn.requestChannelSettings(channel.id, (settings, error) -> SwingUtilities.invokeLater(() -> {
+            if (error != null) {
+                JOptionPane.showMessageDialog(this, "Could not read the channel: " + error,
+                        "Error", JOptionPane.ERROR_MESSAGE);
+                dispose();
+                return;
+            }
+            apply(settings);
+        }));
+        conn.requestChannelPermissions(channel.id, (permissions, error) -> SwingUtilities.invokeLater(() -> {
+            if (error != null) permissionsPanel.showUnavailable("No permission to view channel permissions.");
+            else permissionsPanel.read(permissions);
+        }));
+    }
+
+    /**
+     * Opens the dialog on a channel that does not exist yet. Its permissions start empty
+     * and editable — they are applied to the channel once the server has created it.
+     */
+    private void prepareNew(ChannelSettings defaults) {
+        permissionsPanel.read(Map.of());
+        apply(defaults);
+        name.selectAll();
+    }
+
+    private void apply(ChannelSettings settings) {
+        original = settings;
+        name.setText(settings.name);
+        topic.setText(settings.topic);
+        description.setText(settings.description);
+        description.setCaretPosition(0);
+        if (settings.hasPassword) password.setText(PASSWORD_PLACEHOLDER);
+        passwordEdited = false;
+        setIconId(settings.iconId);
+        for (Tab tab : settingsTabs) tab.read(settings);
+        setEnabledForLoading(true);
+        name.requestFocusInWindow();
+    }
+
+    private void setEnabledForLoading(boolean loaded) {
+        ok.setEnabled(loaded);
+        name.setEnabled(loaded);
+        password.setEnabled(loaded);
+        topic.setEnabled(loaded);
+        description.setEnabled(loaded);
+        iconButton.setEnabled(loaded);
+    }
+
+    // ---- icon ----
+
+    private void setIconId(long id) {
+        setIconId(id, ICON_RETRIES);
+    }
+
+    /**
+     * @param retries how many more times to look for an icon that is still downloading;
+     *                one that never arrives (deleted, or not ours to read) simply stays blank
+     */
+    private void setIconId(long id, int retries) {
+        iconId = id;
+        ImageIcon icon = groupIcons.icon(id);
+        iconButton.setIcon(icon);
+        if (icon != null || id == 0 || retries <= 0) return;
+        Timer retry = new Timer(ICON_RETRY_MS, null);
+        retry.setRepeats(false);
+        retry.addActionListener(e -> {
+            if (iconId == id) setIconId(id, retries - 1);
+        });
+        retry.start();
+    }
+
+    private void chooseIcon() {
+        IconChooserDialog chooser = new IconChooserDialog(this, conn, groupIcons);
+        chooser.setVisible(true);
+        if (chooser.isAccepted()) setIconId(chooser.getIconId());
+    }
+
+    private void showIconMenu(MouseEvent e) {
+        JPopupMenu menu = new JPopupMenu();
+        JMenuItem edit = new JMenuItem("Edit Icon");
+        edit.addActionListener(a -> chooseIcon());
+        JMenuItem remove = new JMenuItem("Remove Icon");
+        remove.setEnabled(iconId != 0);
+        remove.addActionListener(a -> setIconId(0));
+        menu.add(edit);
+        menu.add(remove);
+        menu.show(e.getComponent(), e.getX(), e.getY());
+    }
+
+    // ---- description ----
+
+    private void editDescription() {
+        DescriptionEditorDialog editor = new DescriptionEditorDialog(this, description.getText());
+        editor.setVisible(true);
+        if (editor.isAccepted()) description.setText(editor.getDescription());
+    }
+
+    // ---- saving ----
+
+    private void save() {
+        if (original == null) return;
+        ChannelSettings edited = original.copy();
+        edited.name = name.getText().trim();
+        edited.topic = topic.getText();
+        edited.description = description.getText();
+        edited.password = passwordEdited ? new String(password.getPassword()) : null;
+        edited.iconId = iconId;
+        for (Tab tab : settingsTabs) tab.write(edited);
+
+        if (edited.name.isEmpty()) {
+            JOptionPane.showMessageDialog(this, "The channel needs a name.",
+                    "Error", JOptionPane.ERROR_MESSAGE);
+            return;
+        }
+
+        if (channel == null) {
+            ok.setEnabled(false);
+            conn.createChannel(parentId, edited.creationParameters(), permissionsPanel.changed(),
+                    (channelId, error) -> SwingUtilities.invokeLater(
+                            () -> finish(error, "Could not create the channel: ")));
+            return;
+        }
+
+        Map<String, String> changes = edited.changesFrom(original);
+        Map<String, Integer> setPermissions = permissionsPanel.changed();
+        List<String> clearedPermissions = permissionsPanel.cleared();
+        if (changes.isEmpty() && setPermissions.isEmpty() && clearedPermissions.isEmpty()) {
+            dispose();
+            return;
+        }
+
+        ok.setEnabled(false);
+        conn.applyChannelEdit(channel.id, changes, setPermissions, clearedPermissions,
+                error -> SwingUtilities.invokeLater(() -> finish(error, "Could not save the channel: ")));
+    }
+
+    /** Closes the dialog, or reports why the server would not have it and lets the user retry. */
+    private void finish(String error, String errorPrefix) {
+        if (error == null) {
+            dispose();
+            return;
+        }
+        ok.setEnabled(true);
+        JOptionPane.showMessageDialog(this, errorPrefix + error, "Error", JOptionPane.ERROR_MESSAGE);
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/ChannelMenu.java

@@ -1,6 +1,7 @@
 package com.ts3client.ui;
 
 import com.ts3client.net.ChannelNode;
+import com.ts3client.net.ChannelSettings;
 
 import javax.swing.JMenuItem;
 import javax.swing.JPopupMenu;
@@ -20,6 +21,18 @@ final class ChannelMenu {
         join.addActionListener(a -> actions.joinChannel(channel.id));
         menu.add(join);
         menu.addSeparator();
+        // Both start out temporary: a channel made from another channel's menu is
+        // usually a throwaway one, and a permanent channel is a deliberate choice.
+        JMenuItem create = new JMenuItem("Create Channel", Icons.of("CHANNEL_CREATE"));
+        create.addActionListener(a -> actions.createChannel(null, ChannelSettings.Type.TEMPORARY));
+        menu.add(create);
+        JMenuItem createSub = new JMenuItem("Create Sub-Channel", Icons.of("CHANNEL_CREATE_SUB"));
+        createSub.addActionListener(a -> actions.createChannel(channel, ChannelSettings.Type.TEMPORARY));
+        menu.add(createSub);
+        JMenuItem edit = new JMenuItem("Edit Channel", Icons.of("CHANNEL_EDIT"));
+        edit.addActionListener(a -> actions.editChannel(channel));
+        menu.add(edit);
+        menu.addSeparator();
         addSubscriptionItems(menu, channel, actions);
         JMenuItem files = new JMenuItem("Browse files", Icons.of("FILETRANSFER"));
         files.addActionListener(a -> actions.browseFiles(channel));

ts3-client/swing/src/main/java/com/ts3client/ui/ChannelPermissionsPanel.java

@@ -0,0 +1,148 @@
+package com.ts3client.ui;
+
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JSpinner;
+import javax.swing.SpinnerNumberModel;
+import java.awt.Color;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * The channel editor's "Permissions" tab: the needed-power permissions set on the channel
+ * itself, which is the subset of channel permissions TeamSpeak surfaces here.
+ *
+ * <p>These are not channel properties but permissions, so they are read with
+ * {@code channelpermlist} and written with {@code channeladdperm}. A power left at zero is
+ * not a permission the channel carries: clearing a spinner back to zero removes the
+ * permission again so the channel inherits it, which is how the official client behaves.
+ */
+final class ChannelPermissionsPanel extends JPanel {
+
+    /** The regular powers, in the order the official dialog lists them. */
+    private static final String[][] REGULAR = {
+            {"i_channel_needed_join_power", "Join:"},
+            {"i_channel_needed_subscribe_power", "Subscribe:"},
+            {"i_channel_needed_description_view_power", "Desc. View:"},
+            {"i_channel_needed_modify_power", "Modify:"},
+            {"i_channel_needed_delete_power", "Delete:"}};
+
+    private static final String[][] FILE_TRANSFER = {
+            {"i_ft_needed_file_browse_power", "Browse:"},
+            {"i_ft_needed_file_upload_power", "Upload:"},
+            {"i_ft_needed_file_download_power", "Download:"},
+            {"i_ft_needed_file_rename_power", "Rename:"},
+            {"i_ft_needed_directory_create_power", "Dir. Create:"}};
+
+    private final Map<String, JSpinner> spinners = new LinkedHashMap<>();
+    /** The values the server reported, to tell an edited power from an untouched one. */
+    private final Map<String, Integer> original = new LinkedHashMap<>();
+    private final JLabel status = new JLabel(" ");
+
+    ChannelPermissionsPanel() {
+        setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
+        setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
+
+        JPanel groups = new JPanel();
+        groups.setLayout(new BoxLayout(groups, BoxLayout.X_AXIS));
+        groups.add(group("Regular Needed Powers", REGULAR));
+        groups.add(Box.createHorizontalStrut(8));
+        groups.add(group("File Transfer Needed Powers", FILE_TRANSFER));
+        groups.setAlignmentX(0f);
+        add(groups);
+
+        status.setAlignmentX(0f);
+        status.setBorder(BorderFactory.createEmptyBorder(6, 2, 0, 2));
+        add(status);
+        add(Box.createVerticalGlue());
+        setEditable(false);
+    }
+
+    /** Fills the spinners from a {@code channelpermlist} result and enables editing. */
+    void read(Map<String, Integer> permissions) {
+        original.clear();
+        for (Map.Entry<String, JSpinner> entry : spinners.entrySet()) {
+            int value = permissions.getOrDefault(entry.getKey(), 0);
+            original.put(entry.getKey(), value);
+            entry.getValue().setValue(value);
+        }
+        setEditable(true);
+        setStatus(" ", false);
+    }
+
+    /** Greys the tab out with a reason, e.g. when the server refuses to show the permissions. */
+    void showUnavailable(String message) {
+        setEditable(false);
+        setStatus(message, true);
+    }
+
+    /** The permissions whose power was changed to a non-zero value. */
+    Map<String, Integer> changed() {
+        Map<String, Integer> changed = new LinkedHashMap<>();
+        for (Map.Entry<String, JSpinner> entry : spinners.entrySet()) {
+            int value = (Integer) entry.getValue().getValue();
+            if (value != 0 && value != original.getOrDefault(entry.getKey(), 0)) {
+                changed.put(entry.getKey(), value);
+            }
+        }
+        return changed;
+    }
+
+    /** The permissions cleared back to zero, which are removed from the channel. */
+    List<String> cleared() {
+        List<String> cleared = new ArrayList<>();
+        for (Map.Entry<String, JSpinner> entry : spinners.entrySet()) {
+            int value = (Integer) entry.getValue().getValue();
+            if (value == 0 && original.getOrDefault(entry.getKey(), 0) != 0) cleared.add(entry.getKey());
+        }
+        return cleared;
+    }
+
+    void setStatus(String message, boolean error) {
+        status.setText(message == null || message.isEmpty() ? " " : message);
+        status.setForeground(error ? Color.RED.darker() : Theme.chatSystem());
+    }
+
+    private void setEditable(boolean editable) {
+        for (JSpinner spinner : spinners.values()) spinner.setEnabled(editable);
+    }
+
+    private JPanel group(String title, String[][] permissions) {
+        JPanel panel = new JPanel(new GridBagLayout());
+        panel.setBorder(BorderFactory.createTitledBorder(title));
+        GridBagConstraints c = new GridBagConstraints();
+        c.insets = new Insets(3, 4, 3, 4);
+        c.anchor = GridBagConstraints.WEST;
+        c.fill = GridBagConstraints.HORIZONTAL;
+        int row = 0;
+        for (String[] permission : permissions) {
+            JSpinner spinner = Spinners.compact(new JSpinner(new SpinnerNumberModel(0, 0, 9999, 1)));
+            spinners.put(permission[0], spinner);
+            c.gridx = 0;
+            c.gridy = row;
+            c.weightx = 0;
+            panel.add(new JLabel(permission[1]), c);
+            c.gridx = 1;
+            c.weightx = 1;
+            c.fill = GridBagConstraints.NONE;
+            panel.add(spinner, c);
+            c.fill = GridBagConstraints.HORIZONTAL;
+            row++;
+        }
+        // Keeps the rows at the top of the group instead of centred in whatever height
+        // the tab happens to give it.
+        c.gridx = 0;
+        c.gridy = row;
+        c.weighty = 1;
+        panel.add(Box.createGlue(), c);
+        return panel;
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/ChannelStandardPanel.java

@@ -0,0 +1,195 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.ChannelNode;
+import com.ts3client.net.ChannelSettings;
+
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.BoxLayout;
+import javax.swing.ButtonGroup;
+import javax.swing.DefaultComboBoxModel;
+import javax.swing.JCheckBox;
+import javax.swing.JComboBox;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JRadioButton;
+import javax.swing.JSeparator;
+import javax.swing.JSpinner;
+import javax.swing.SpinnerNumberModel;
+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.awt.FlowLayout;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+import java.util.List;
+import java.util.function.Consumer;
+
+/**
+ * The channel editor's "Standard" tab: how long the channel lives, whether it is the
+ * server's default one, where it sorts among its siblings, and its moderation setting.
+ */
+final class ChannelStandardPanel extends JPanel implements ChannelDialog.Tab {
+
+    private final JRadioButton temporary = new JRadioButton("Temporary");
+    private final JRadioButton semiPermanent = new JRadioButton("Semi-Permanent");
+    private final JRadioButton permanent = new JRadioButton("Permanent");
+    private final JCheckBox defaultChannel = new JCheckBox("Default Channel");
+    private final JComboBox<SortEntry> sortAfter = new JComboBox<>();
+    private final JSpinner talkPower = new JSpinner(new SpinnerNumberModel(0, 0, 9999, 1));
+
+    private Consumer<ChannelSettings.Type> typeListener;
+
+    /**
+     * @param siblings the channels this one shares a parent with, in tree order and
+     *                 excluding the channel being edited
+     */
+    ChannelStandardPanel(List<ChannelNode> siblings) {
+        super(new BorderLayout(8, 8));
+        setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
+
+        temporary.setToolTipText("Channel will be deleted when the last user left.");
+        semiPermanent.setToolTipText("Channel exists until server is restarted.");
+        permanent.setToolTipText("Channel will exist until manually deleted.");
+        ButtonGroup types = new ButtonGroup();
+        types.add(temporary);
+        types.add(semiPermanent);
+        types.add(permanent);
+        for (JRadioButton radio : new JRadioButton[]{temporary, semiPermanent, permanent}) {
+            radio.addActionListener(a -> fireTypeChanged());
+        }
+
+        defaultChannel.setToolTipText("<html>The default channel is the place where new clients join on login."
+                + "<br>There can be only one default channel for the whole server.</html>");
+
+        DefaultComboBoxModel<SortEntry> order = new DefaultComboBoxModel<>();
+        order.addElement(new SortEntry(0, "(first)"));
+        for (ChannelNode sibling : siblings) order.addElement(new SortEntry(sibling.id, sibling.name));
+        sortAfter.setModel(order);
+        sortAfter.setToolTipText("Channel will be sorted below this channel.");
+        sortAfter.setPreferredSize(new Dimension(200, sortAfter.getPreferredSize().height));
+        Spinners.compact(talkPower);
+
+        add(typeBox(), BorderLayout.WEST);
+        add(rightColumn(), BorderLayout.CENTER);
+    }
+
+    /** Notified whenever the channel type changes, so the delete delay can follow it. */
+    void onTypeChanged(Consumer<ChannelSettings.Type> listener) {
+        this.typeListener = listener;
+    }
+
+    @Override
+    public void read(ChannelSettings settings) {
+        switch (settings.type) {
+            case TEMPORARY:
+                temporary.setSelected(true);
+                break;
+            case SEMI_PERMANENT:
+                semiPermanent.setSelected(true);
+                break;
+            default:
+                permanent.setSelected(true);
+                break;
+        }
+        defaultChannel.setSelected(settings.defaultChannel);
+        // The default channel cannot simply stop being one; another has to take over.
+        defaultChannel.setEnabled(!settings.defaultChannel);
+        select(settings.order);
+        talkPower.setValue(settings.neededTalkPower);
+        fireTypeChanged();
+    }
+
+    @Override
+    public void write(ChannelSettings settings) {
+        settings.type = selectedType();
+        settings.defaultChannel = defaultChannel.isSelected();
+        SortEntry entry = (SortEntry) sortAfter.getSelectedItem();
+        settings.order = entry == null ? 0 : entry.channelId;
+        settings.neededTalkPower = (Integer) talkPower.getValue();
+    }
+
+    private ChannelSettings.Type selectedType() {
+        if (temporary.isSelected()) return ChannelSettings.Type.TEMPORARY;
+        if (semiPermanent.isSelected()) return ChannelSettings.Type.SEMI_PERMANENT;
+        return ChannelSettings.Type.PERMANENT;
+    }
+
+    private void fireTypeChanged() {
+        if (typeListener != null) typeListener.accept(selectedType());
+    }
+
+    private void select(int channelId) {
+        for (int i = 0; i < sortAfter.getItemCount(); i++) {
+            if (sortAfter.getItemAt(i).channelId == channelId) {
+                sortAfter.setSelectedIndex(i);
+                return;
+            }
+        }
+        sortAfter.setSelectedIndex(0);
+    }
+
+    private JPanel typeBox() {
+        JPanel box = new JPanel();
+        box.setLayout(new BoxLayout(box, BoxLayout.Y_AXIS));
+        box.setBorder(BorderFactory.createTitledBorder("Channel Type"));
+        for (JRadioButton radio : new JRadioButton[]{temporary, semiPermanent, permanent}) {
+            radio.setAlignmentX(0f);
+            box.add(radio);
+        }
+        JSeparator line = new JSeparator();
+        line.setAlignmentX(0f);
+        line.setMaximumSize(new Dimension(Integer.MAX_VALUE, 8));
+        box.add(Box.createVerticalStrut(4));
+        box.add(line);
+        box.add(Box.createVerticalStrut(4));
+        defaultChannel.setAlignmentX(0f);
+        box.add(defaultChannel);
+        box.add(Box.createVerticalGlue());
+        return box;
+    }
+
+    private JPanel rightColumn() {
+        JPanel sort = new JPanel(new BorderLayout());
+        sort.setBorder(BorderFactory.createTitledBorder("Sort This Channel After:"));
+        sort.add(sortAfter, BorderLayout.CENTER);
+
+        JPanel moderation = new JPanel(new FlowLayout(FlowLayout.LEFT, 6, 2));
+        moderation.setBorder(BorderFactory.createTitledBorder("Moderation"));
+        JLabel label = new JLabel("Needed Talk Power:");
+        label.setToolTipText("Talk Power required to speak in this channel.");
+        moderation.add(label);
+        moderation.add(talkPower);
+
+        // Both groups keep their natural height; the filler below soaks up the rest, so
+        // they sit at the top instead of stretching over the whole tab.
+        JPanel column = new JPanel(new GridBagLayout());
+        GridBagConstraints c = new GridBagConstraints();
+        c.gridx = 0;
+        c.fill = GridBagConstraints.HORIZONTAL;
+        c.weightx = 1;
+        c.insets = new Insets(0, 0, 6, 0);
+        column.add(sort, c);
+        column.add(moderation, c);
+        c.weighty = 1;
+        c.fill = GridBagConstraints.BOTH;
+        column.add(Box.createGlue(), c);
+        return column;
+    }
+
+    /** One entry of the "sort after" list: a sibling channel, or the top of the list. */
+    private static final class SortEntry {
+        final int channelId;
+        final String label;
+
+        SortEntry(int channelId, String label) {
+            this.channelId = channelId;
+            this.label = label;
+        }
+
+        @Override
+        public String toString() {
+            return label;
+        }
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/ChatPanel.java

@@ -4,6 +4,7 @@ import com.ts3client.text.BBCode;
 import com.ts3client.text.TsLink;
 
 import javax.swing.BorderFactory;
+import javax.swing.Icon;
 import javax.swing.JButton;
 import javax.swing.JEditorPane;
 import javax.swing.JLabel;
@@ -15,8 +16,6 @@ import javax.swing.SwingUtilities;
 import javax.swing.event.HyperlinkEvent;
 import javax.swing.text.BadLocationException;
 import javax.swing.text.html.HTMLDocument;
-import javax.swing.text.html.HTMLEditorKit;
-import javax.swing.text.html.StyleSheet;
 import java.awt.BorderLayout;
 import java.awt.Component;
 import java.awt.Cursor;
@@ -25,6 +24,7 @@ import java.awt.FlowLayout;
 import java.awt.Point;
 import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
+import java.awt.event.MouseWheelEvent;
 import java.io.IOException;
 import java.text.SimpleDateFormat;
 import java.util.Date;
@@ -62,6 +62,10 @@ public final class ChatPanel extends JPanel {
     private final Tab channelTab = new Tab(Target.CHANNEL, 0, "Channel");
     /** Private chats keyed by the peer's client id. */
     private final Map<Integer, Tab> privateTabs = new LinkedHashMap<>();
+    /** Static-content tabs (e.g. a moved-out description), keyed by caller-chosen id. */
+    private final Map<String, Tab> noteTabs = new LinkedHashMap<>();
+
+    private final TabDragReorder dragReorder = new TabDragReorder(tabs, this::moveTab);
 
     private SendHandler sendHandler;
     private LinkHandler linkHandler;
@@ -69,7 +73,8 @@ public final class ChatPanel extends JPanel {
     public ChatPanel() {
         super(new BorderLayout());
 
-        tabs.setFont(Theme.UI_FONT);
+        tabs.setFont(Theme.uiFont());
+        tabs.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
         addTab(serverTab, false);
         addTab(channelTab, false);
         tabs.setSelectedIndex(0);
@@ -77,6 +82,8 @@ public final class ChatPanel extends JPanel {
             Tab t = selectedTab();
             if (t != null) t.setUnread(false);
         });
+        tabs.addMouseWheelListener(this::onWheel);
+        dragReorder.attach(tabs);
         add(tabs, BorderLayout.CENTER);
 
         JPanel bottom = new JPanel(new BorderLayout(4, 0));
@@ -130,6 +137,40 @@ public final class ChatPanel extends JPanel {
         });
     }
 
+    /** Drops every static-content tab (moved-out descriptions), e.g. after disconnecting. */
+    public void closeNoteTabs() {
+        edt(() -> {
+            for (Tab t : noteTabs.values()) tabs.remove(t.scroll);
+            noteTabs.clear();
+        });
+    }
+
+    /** Closes a single static-content tab by its key, if open; does not run its {@code onClose}. */
+    public void closeNoteTab(String key) {
+        edt(() -> {
+            Tab tab = noteTabs.remove(key);
+            if (tab != null) tabs.remove(tab.scroll);
+        });
+    }
+
+    /**
+     * Opens (or replaces the content of, and focuses) a static-content tab, e.g. a
+     * channel/client description moved out of the info panel. {@code onClose} runs
+     * when the tab is closed, so the caller can un-hide the description again.
+     */
+    public void openDescriptionTab(String key, Icon icon, String title, String htmlBody, Runnable onClose) {
+        edt(() -> {
+            Tab tab = noteTabs.get(key);
+            if (tab == null) {
+                tab = new Tab(key, icon, title, onClose);
+                noteTabs.put(key, tab);
+                addTab(tab, true);
+            }
+            tab.setStaticContent(htmlBody);
+            tabs.setSelectedComponent(tab.scroll);
+        });
+    }
+
     private void fireSend() {
         String text = input.getText().trim();
         if (text.isEmpty() || sendHandler == null) return;
@@ -143,10 +184,20 @@ public final class ChatPanel extends JPanel {
 
     /** System notices always land in the server tab. */
     public void appendSystem(String text) {
-        edt(() -> serverTab.appendLine("<span style=\"color:#8A8A8A\">" + stamp()
+        edt(() -> serverTab.appendLine("<span class=\"muted\">" + stamp()
                 + BBCode.escape(text) + "</span>"));
     }
 
+    /**
+     * Server-side events (client joins/leaves/moves, group changes, channel edits, …).
+     * These lines name clients and channels with TeamSpeak's own links, which stay
+     * clickable here — everything else in them is literal text.
+     */
+    public void appendServerLog(String text) {
+        edt(() -> serverTab.appendLine("<span class=\"event\">" + stamp()
+                + BBCode.linksToHtml(text) + "</span>"));
+    }
+
     public void appendServerMessage(int fromId, String from, String text) {
         edt(() -> serverTab.appendMessage(fromId, from, text));
     }
@@ -180,10 +231,40 @@ public final class ChatPanel extends JPanel {
     }
 
     private void closeTab(Tab tab) {
-        privateTabs.remove(tab.clientId);
+        if (tab.noteKey != null) {
+            noteTabs.remove(tab.noteKey);
+            if (tab.onClose != null) tab.onClose.run();
+        } else {
+            privateTabs.remove(tab.clientId);
+        }
         tabs.remove(tab.scroll);
     }
 
+    /** Drags a tab from one position to another, keeping the current selection on screen. */
+    private void moveTab(int from, int to) {
+        if (from < 0 || to < 0 || from >= tabs.getTabCount() || to >= tabs.getTabCount() || from == to) return;
+        Component content = tabs.getComponentAt(from);
+        String title = tabs.getTitleAt(from);
+        Icon icon = tabs.getIconAt(from);
+        String tip = tabs.getToolTipTextAt(from);
+        Component header = tabs.getTabComponentAt(from);
+        boolean wasSelected = tabs.getSelectedIndex() == from;
+        tabs.removeTabAt(from);
+        tabs.insertTab(title, icon, content, tip, to);
+        tabs.setTabComponentAt(to, header);
+        if (wasSelected) tabs.setSelectedIndex(to);
+    }
+
+    private void onWheel(MouseWheelEvent e) {
+        Component content = tabs.getSelectedComponent();
+        if (content != null && content.getBounds().contains(e.getPoint())) return;
+        int steps = e.getWheelRotation();
+        if (steps == 0) return;
+        int target = Math.max(0, Math.min(tabs.getTabCount() - 1, tabs.getSelectedIndex() + steps));
+        if (target != tabs.getSelectedIndex()) tabs.setSelectedIndex(target);
+        e.consume();
+    }
+
     private Tab selectedTab() {
         Component c = tabs.getSelectedComponent();
         if (c == serverTab.scroll) return serverTab;
@@ -205,40 +286,39 @@ public final class ChatPanel extends JPanel {
         final Target target;
         final int clientId;
         final String title;
-        final JEditorPane log = new JEditorPane();
+        final JEditorPane log = HtmlStyles.pane("font-family:sans-serif; font-size:11px; margin:4px 6px;");
         final JScrollPane scroll;
-        private final HTMLDocument doc;
+        /** Set for a static-content tab (e.g. a moved-out description); null for a conversation. */
+        final String noteKey;
+        final Runnable onClose;
+        private final Icon icon;
         private JLabel titleLabel;
 
         Tab(Target target, int clientId, String title) {
+            this(target, clientId, title, null, null, null);
+        }
+
+        /** A static-content tab: no send target, closing it runs {@code onClose}. */
+        Tab(String noteKey, Icon icon, String title, Runnable onClose) {
+            this(null, 0, title, icon, noteKey, onClose);
+        }
+
+        private Tab(Target target, int clientId, String title, Icon icon, String noteKey, Runnable onClose) {
             this.target = target;
             this.clientId = clientId;
             this.title = title;
+            this.icon = icon;
+            this.noteKey = noteKey;
+            this.onClose = onClose;
 
-            HTMLEditorKit kit = new HTMLEditorKit();
-            StyleSheet css = new StyleSheet();
-            css.addStyleSheet(kit.getStyleSheet());
-            css.addRule("body { font-family:sans-serif; font-size:11px; color:#202020; margin:4px 6px; }");
-            css.addRule("a { color:" + hex(Theme.CHAT_NAME) + "; text-decoration:none; }");
-            // Client references look exactly like a message author's name.
-            css.addRule("a." + BBCode.IDENTITY_LINK_CLASS
-                    + " { color:" + hex(Theme.CHAT_NAME) + "; font-weight:bold; text-decoration:none; }");
-            // External links are underlined so they can't be mistaken for an identity.
-            css.addRule("a." + BBCode.EXTERNAL_LINK_CLASS
-                    + " { color:" + hex(Theme.LINK) + "; text-decoration:underline; }");
-            kit.setStyleSheet(css);
-
-            log.setEditorKit(kit);
-            log.setEditable(false);
-            log.setBackground(Theme.CHAT_BG);
             log.setText("<html><body><div id=\"chatlog\"></div></body></html>");
-            doc = (HTMLDocument) log.getDocument();
             log.addHyperlinkListener(e -> {
                 if (e.getEventType() != HyperlinkEvent.EventType.ACTIVATED) return;
                 onLink(e.getDescription());
             });
 
             scroll = new JScrollPane(log);
+            HtmlStyles.fillViewport(log);
             scroll.setBorder(BorderFactory.createEmptyBorder());
         }
 
@@ -259,13 +339,15 @@ public final class ChatPanel extends JPanel {
         Component header(boolean closable) {
             JPanel p = new JPanel(new FlowLayout(FlowLayout.LEFT, 4, 0));
             p.setOpaque(false);
-            titleLabel = new JLabel(title);
-            titleLabel.setFont(Theme.UI_FONT);
+            titleLabel = new JLabel(title, icon, JLabel.LEADING);
+            titleLabel.setFont(Theme.uiFont());
             p.add(titleLabel);
+            dragReorder.attach(p);
+            dragReorder.attach(titleLabel);
             if (closable) {
                 JLabel close = new JLabel("×");
-                close.setFont(Theme.UI_BOLD);
-                close.setForeground(Theme.CHAT_SYSTEM);
+                close.setFont(Theme.uiBold());
+                close.setForeground(Theme.chatSystem());
                 close.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
                 close.setToolTipText("Close chat");
                 close.addMouseListener(new MouseAdapter() {
@@ -289,8 +371,8 @@ public final class ChatPanel extends JPanel {
 
         void setUnread(boolean unread) {
             if (titleLabel == null) return;
-            titleLabel.setFont(unread ? Theme.UI_BOLD : Theme.UI_FONT);
-            titleLabel.setForeground(unread ? Theme.ACCENT : null);
+            titleLabel.setFont(unread ? Theme.uiBold() : Theme.uiFont());
+            titleLabel.setForeground(unread ? Theme.accent() : null);
         }
 
         void appendMessage(int fromId, String from, String text) {
@@ -298,13 +380,20 @@ public final class ChatPanel extends JPanel {
             String sender = fromId > 0
                     ? "<a class=\"" + BBCode.IDENTITY_LINK_CLASS + "\" href=\""
                         + BBCode.escape(TsLink.clientHref(fromId, "", from)) + "\">" + name + "</a>"
-                    : "<b style=\"color:" + hex(Theme.CHAT_NAME) + "\">" + name + "</b>";
-            appendLine("<span style=\"color:#8A8A8A\">" + stamp() + "</span>"
+                    : "<span class=\"name\">" + name + "</span>";
+            appendLine("<span class=\"muted\">" + stamp() + "</span>"
                     + sender + ": " + BBCode.toHtml(text));
         }
 
+        /** Replaces the whole log with fixed content; used by static-content tabs. */
+        void setStaticContent(String html) {
+            log.setText("<html><body><div id=\"chatlog\">" + html + "</div></body></html>");
+            log.setCaretPosition(0);
+        }
+
         void appendLine(String html) {
             try {
+                HTMLDocument doc = (HTMLDocument) log.getDocument();
                 doc.insertBeforeEnd(doc.getElement("chatlog"), "<div>" + html + "</div>");
                 log.setCaretPosition(doc.getLength());
             } catch (BadLocationException | IOException ignored) {
@@ -312,8 +401,4 @@ public final class ChatPanel extends JPanel {
             if (tabs.getSelectedComponent() != scroll) setUnread(true);
         }
     }
-
-    private static String hex(java.awt.Color c) {
-        return String.format("#%06X", c.getRGB() & 0xFFFFFF);
-    }
 }

ts3-client/swing/src/main/java/com/ts3client/ui/ClientMenu.java

@@ -1,9 +1,15 @@
 package com.ts3client.ui;
 
+import com.ts3client.net.ChannelNode;
 import com.ts3client.net.ClientEntry;
+import com.ts3client.net.Group;
+import com.ts3client.net.ServerModel;
 
+import javax.swing.JCheckBoxMenuItem;
+import javax.swing.JMenu;
 import javax.swing.JMenuItem;
 import javax.swing.JPopupMenu;
+import java.util.List;
 
 /**
  * The context menu for a client, shared by the server tree and the clickable
@@ -14,7 +20,13 @@ final class ClientMenu {
     private ClientMenu() {
     }
 
-    static JPopupMenu build(ClientEntry client, boolean self, ServerTreePanel.Actions actions) {
+    /**
+     * @param fromTree whether this menu was opened from the server tree itself, as
+     *                 opposed to a client link elsewhere (chat log, etc.) — "Find
+     *                 Client in Channel Tree" is redundant in the former case.
+     */
+    static JPopupMenu build(ClientEntry client, boolean self, boolean fromTree, ServerModel model,
+                             GroupIcons groupIcons, ServerTreePanel.Actions actions) {
         JPopupMenu menu = new JPopupMenu();
         if (!self) {
             JMenuItem pm = new JMenuItem("Open text chat", Icons.of("PLAYER_CHAT"));
@@ -44,15 +56,117 @@ final class ClientMenu {
             menu.add(me);
         }
         menu.addSeparator();
+        menu.add(buildServerGroupMenu(client, model, groupIcons, actions));
+        menu.add(buildChannelGroupMenu(client, model, groupIcons, actions));
+        menu.addSeparator();
+        if (!fromTree) {
+            JMenuItem findInTree = new JMenuItem("Find Client in Channel Tree", Icons.of("CHANNEL_SWITCH"));
+            findInTree.setEnabled(isVisible(client, model));
+            findInTree.addActionListener(a -> actions.findClientInTree(client));
+            menu.add(findInTree);
+        }
+        JMenuItem description = new JMenuItem("Change Description", Icons.of("EDIT"));
+        description.addActionListener(a -> actions.changeClientDescription(client));
+        menu.add(description);
         JMenuItem info = new JMenuItem("Connection Info", Icons.of("INFO"));
         info.addActionListener(a -> actions.showConnectionInfo(client));
         menu.add(info);
         if (!self) {
             menu.addSeparator();
+            JMenuItem joinChannel = new JMenuItem("Join Channel of Client", Icons.of("CHANNEL_SWITCH"));
+            joinChannel.setEnabled(canJoinChannelOf(client, model));
+            joinChannel.addActionListener(a -> actions.joinChannel(client.channelId));
+            menu.add(joinChannel);
             JMenuItem moveHere = new JMenuItem("Move Client to own Channel", Icons.of("MOVE_CLIENT_TO_OWN_CHANNEL"));
             moveHere.addActionListener(a -> actions.moveClientToOwnChannel(client));
             menu.add(moveHere);
         }
         return menu;
     }
+
+    /**
+     * Whether the client's channel is actually rendered in the tree — it won't be if
+     * we're not subscribed to it (e.g. it needs more subscribe power than we have).
+     */
+    private static boolean isVisible(ClientEntry client, ServerModel model) {
+        ChannelNode channel = model.getChannel(client.channelId);
+        return channel != null && channel.subscribed;
+    }
+
+    /**
+     * Whether we can expect a join to succeed: the channel must be visible to us, and
+     * not already full. This can't account for a join-power permission requirement —
+     * unlike group membership, TS3 doesn't expose a channel's join-power threshold as
+     * a plain property, only as a permission resolved through channel/channel-group/
+     * server-group inheritance, which isn't something a regular client can query.
+     */
+    private static boolean canJoinChannelOf(ClientEntry client, ServerModel model) {
+        ChannelNode channel = model.getChannel(client.channelId);
+        if (channel == null || !channel.subscribed) return false;
+        return channel.maxClients < 0 || channel.clients.size() < channel.maxClients;
+    }
+
+    private static JMenu buildServerGroupMenu(ClientEntry client, ServerModel model, GroupIcons groupIcons,
+                                               ServerTreePanel.Actions actions) {
+        JMenu menu = new JMenu("Set Server Groups");
+        menu.setIcon(Icons.of("PERMISSIONS_SERVER_GROUPS"));
+        JMenuItem dialog = new JMenuItem("Server Groups Dialog...");
+        dialog.addActionListener(a -> actions.showServerGroupsDialog(client));
+        menu.add(dialog);
+        menu.addSeparator();
+
+        int addPower = model.selfPermissionValue("i_group_needed_member_add_power");
+        int removePower = model.selfPermissionValue("i_group_needed_member_remove_power");
+        for (Group g : model.allServerGroups()) {
+            boolean assigned = contains(client.serverGroupIds, g.id);
+            if (!canAssign(g, assigned, addPower, removePower)) continue;
+            JCheckBoxMenuItem item = new JCheckBoxMenuItem(g.name, groupIcons.iconOf(g));
+            item.setSelected(assigned);
+            item.addActionListener(a -> actions.setClientServerGroup(client, g, !assigned));
+            menu.add(item);
+        }
+        return menu;
+    }
+
+    private static JMenu buildChannelGroupMenu(ClientEntry client, ServerModel model, GroupIcons groupIcons,
+                                                ServerTreePanel.Actions actions) {
+        JMenu menu = new JMenu("Set Channel Group");
+        menu.setIcon(Icons.of("PERMISSIONS_CHANNEL_GROUPS"));
+        int addPower = model.selfPermissionValue("i_group_needed_member_add_power");
+        int removePower = model.selfPermissionValue("i_group_needed_member_remove_power");
+        int defaultGroupId = model.defaultChannelGroupId();
+        for (Group g : model.allChannelGroups()) {
+            if (g.id == defaultGroupId) continue;
+            boolean assigned = client.channelGroupId == g.id;
+            if (!canAssign(g, assigned, addPower, removePower)) continue;
+            JCheckBoxMenuItem item = new JCheckBoxMenuItem(g.name, groupIcons.iconOf(g));
+            item.setSelected(assigned);
+            item.addActionListener(a -> actions.setClientChannelGroup(client, g));
+            menu.add(item);
+        }
+        return menu;
+    }
+
+    /**
+     * Whether the local client has enough power to (un)assign this group: the add
+     * power always gates the checkbox, and the remove power additionally gates
+     * unassigning an already-held group. {@code -1} is TS3's "unlimited" sentinel on
+     * either side: an unlimited local power always passes, and a group that needs
+     * unlimited power can only be touched by a local client that has it.
+     */
+    static boolean canAssign(Group g, boolean assigned, int addPower, int removePower) {
+        return hasPower(g.neededMemberAddPower, addPower)
+                && (!assigned || hasPower(g.neededMemberRemovePower, removePower));
+    }
+
+    private static boolean hasPower(int needed, int own) {
+        if (own == -1) return true;
+        if (needed == -1) return false;
+        return own >= needed;
+    }
+
+    private static boolean contains(int[] ids, int id) {
+        for (int i : ids) if (i == id) return true;
+        return false;
+    }
 }

ts3-client/swing/src/main/java/com/ts3client/ui/ClientVersionPanel.java

@@ -0,0 +1,190 @@
+package com.ts3client.ui;
+
+import com.ts3client.config.ClientVersion;
+import com.ts3client.config.Settings;
+
+import javax.swing.BorderFactory;
+import javax.swing.DefaultListCellRenderer;
+import javax.swing.JCheckBox;
+import javax.swing.JComboBox;
+import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.JList;
+import javax.swing.JPanel;
+import javax.swing.JTextField;
+import java.awt.BorderLayout;
+import java.awt.Component;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+
+/**
+ * Options page for the version and operating system reported to the server, which
+ * is what other clients see next to the nickname ("3.6.2 on Windows").
+ *
+ * <p>Servers verify TeamSpeak's signature over the version and platform and refuse
+ * the connection ("client is modified") when it does not match, so the page is
+ * built around the signed versions in {@link ClientVersion#PRESETS}. The fields
+ * behind them can still be edited by hand for a version whose signature is known
+ * from somewhere else. Changes take effect on the next connect.
+ */
+final class ClientVersionPanel extends JPanel {
+
+    /** Combo entry that leaves the three fields to the user. */
+    private static final String CUSTOM = "Custom…";
+
+    private final Settings settings;
+
+    private final JCheckBox enabled = new JCheckBox("Report a custom version and operating system");
+    private final JComboBox<Object> presetCombo = new JComboBox<>();
+    private final JTextField versionField = new JTextField(24);
+    private final JComboBox<String> platformCombo = new JComboBox<>();
+    private final JTextField signField = new JTextField(24);
+
+    /** Set while a preset is being copied into the fields, so that does not count as an edit. */
+    private boolean filling;
+
+    ClientVersionPanel(Settings settings) {
+        super(new BorderLayout(0, 8));
+        this.settings = settings;
+
+        setBorder(BorderFactory.createEmptyBorder(12, 12, 12, 12));
+        add(buildForm(), BorderLayout.NORTH);
+
+        load();
+        enabled.addActionListener(e -> updateEnabled());
+        updateEnabled();
+    }
+
+    /** Copies the edited version into the settings; the caller saves them. */
+    void apply() {
+        settings.customVersion = enabled.isSelected();
+        settings.clientVersion = versionField.getText().trim();
+        settings.clientPlatform = String.valueOf(platformCombo.getEditor().getItem()).trim();
+        settings.clientVersionSign = signField.getText().trim();
+    }
+
+    private JComponent buildForm() {
+        JPanel p = new JPanel(new GridBagLayout());
+        GridBagConstraints c = new GridBagConstraints();
+        c.insets = new Insets(2, 2, 2, 2);
+        c.anchor = GridBagConstraints.WEST;
+        c.fill = GridBagConstraints.HORIZONTAL;
+
+        presetCombo.addItem(CUSTOM);
+        for (ClientVersion preset : ClientVersion.PRESETS) presetCombo.addItem(preset);
+        presetCombo.setRenderer(new DefaultListCellRenderer() {
+            @Override
+            public Component getListCellRendererComponent(JList<?> list, Object value, int index,
+                                                          boolean selected, boolean focus) {
+                super.getListCellRendererComponent(list, value, index, selected, focus);
+                setText(value instanceof ClientVersion v ? v.label() : String.valueOf(value));
+                return this;
+            }
+        });
+        presetCombo.setToolTipText("Versions with a signature TeamSpeak issued for them");
+        presetCombo.addActionListener(e -> onPresetSelected());
+
+        platformCombo.setEditable(true);
+        for (String platform : ClientVersion.PLATFORMS) platformCombo.addItem(platform);
+
+        versionField.setToolTipText("Version string, e.g. 3.6.2 [Build: 1695203293]");
+        platformCombo.setToolTipText("Operating system shown to other clients");
+        signField.setToolTipText("TeamSpeak's signature for this version and platform");
+        versionField.getDocument().addDocumentListener(new EditListener());
+        signField.getDocument().addDocumentListener(new EditListener());
+        platformCombo.addActionListener(e -> onFieldEdited());
+
+        int row = 0;
+        c.gridx = 0;
+        c.gridy = row++;
+        c.gridwidth = 2;
+        p.add(enabled, c);
+        c.gridwidth = 1;
+
+        addRow(p, c, row++, new JLabel("Version:"), presetCombo);
+        addRow(p, c, row++, new JLabel("Version string:"), versionField);
+        addRow(p, c, row++, new JLabel("Operating system:"), platformCombo);
+        addRow(p, c, row++, new JLabel("Signature:"), signField);
+
+        c.gridx = 0;
+        c.gridy = row;
+        c.gridwidth = 2;
+        p.add(new JLabel("<html><body style='width:320px'>The three fields belong together: the "
+                + "signature is TeamSpeak's, over that version and operating system. A server "
+                + "answers \"client is modified\" and refuses the connection when it does not "
+                + "accept the version — made up, or older than the server's minimum — so prefer "
+                + "a recent one from the list. Takes effect the next time you connect."
+                + "</body></html>"), c);
+        return p;
+    }
+
+    private void load() {
+        enabled.setSelected(settings.customVersion);
+        ClientVersion preset = ClientVersion.match(
+                settings.clientVersion, settings.clientPlatform, settings.clientVersionSign);
+        fill(preset != null ? preset
+                : new ClientVersion("", settings.clientVersion, settings.clientPlatform, settings.clientVersionSign));
+        presetCombo.setSelectedItem(preset != null ? preset : CUSTOM);
+    }
+
+    private void onPresetSelected() {
+        if (presetCombo.getSelectedItem() instanceof ClientVersion preset) fill(preset);
+    }
+
+    /** A hand-edited field no longer describes the selected preset. */
+    private void onFieldEdited() {
+        if (filling) return;
+        ClientVersion preset = ClientVersion.match(versionField.getText().trim(),
+                String.valueOf(platformCombo.getEditor().getItem()).trim(), signField.getText().trim());
+        presetCombo.setSelectedItem(preset != null ? preset : CUSTOM);
+    }
+
+    private void fill(ClientVersion version) {
+        filling = true;
+        try {
+            versionField.setText(version.version());
+            platformCombo.setSelectedItem(version.platform());
+            platformCombo.getEditor().setItem(version.platform());
+            signField.setText(version.sign());
+        } finally {
+            filling = false;
+        }
+    }
+
+    private void updateEnabled() {
+        boolean on = enabled.isSelected();
+        presetCombo.setEnabled(on);
+        versionField.setEnabled(on);
+        platformCombo.setEnabled(on);
+        signField.setEnabled(on);
+    }
+
+    /** Notices any typing in the version or signature field. */
+    private final class EditListener implements javax.swing.event.DocumentListener {
+        @Override
+        public void insertUpdate(javax.swing.event.DocumentEvent e) {
+            onFieldEdited();
+        }
+
+        @Override
+        public void removeUpdate(javax.swing.event.DocumentEvent e) {
+            onFieldEdited();
+        }
+
+        @Override
+        public void changedUpdate(javax.swing.event.DocumentEvent e) {
+            onFieldEdited();
+        }
+    }
+
+    private static void addRow(JPanel p, GridBagConstraints c, int row, JLabel label, Component field) {
+        c.gridx = 0;
+        c.gridy = row;
+        c.weightx = 0;
+        p.add(label, c);
+        c.gridx = 1;
+        c.weightx = 1;
+        p.add(field, c);
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/ConnectionInfoDialog.java

@@ -63,7 +63,7 @@ public final class ConnectionInfoDialog extends JDialog {
         this.clientId = clientId;
 
         JPanel content = new JPanel(new BorderLayout(0, 10));
-        content.setBackground(Theme.WINDOW_BG);
+        content.setBackground(Theme.windowBg());
         content.setBorder(BorderFactory.createEmptyBorder(12, 14, 12, 14));
         content.add(buildSummary(), BorderLayout.NORTH);
         content.add(buildTabs(), BorderLayout.CENTER);
@@ -92,7 +92,7 @@ public final class ConnectionInfoDialog extends JDialog {
 
     private JPanel buildSummary() {
         JPanel grid = new JPanel(new GridBagLayout());
-        grid.setBackground(Theme.WINDOW_BG);
+        grid.setBackground(Theme.windowBg());
         int row = 0;
         addRow(grid, row++, "Address", addressValue);
         addRow(grid, row++, "Client version", versionValue);
@@ -106,8 +106,8 @@ public final class ConnectionInfoDialog extends JDialog {
 
     private JTabbedPane buildTabs() {
         JTabbedPane tabs = new JTabbedPane();
-        tabs.setFont(Theme.UI_FONT);
-        tabs.setBackground(Theme.WINDOW_BG);
+        tabs.setFont(Theme.uiFont());
+        tabs.setBackground(Theme.windowBg());
         tabs.addTab("Total", totalTab);
         tabs.addTab("Speech", speechTab);
         tabs.addTab("Keep Alive", keepAliveTab);
@@ -118,7 +118,7 @@ public final class ConnectionInfoDialog extends JDialog {
     private JPanel buildButtons() {
         JPanel bar = new JPanel();
         bar.setLayout(new BoxLayout(bar, BoxLayout.X_AXIS));
-        bar.setBackground(Theme.WINDOW_BG);
+        bar.setBackground(Theme.windowBg());
         bar.add(Box.createHorizontalGlue());
         JButton close = new JButton("Close");
         close.addActionListener(e -> dispose());
@@ -128,8 +128,8 @@ public final class ConnectionInfoDialog extends JDialog {
 
     private static JLabel value() {
         JLabel l = new JLabel("—");
-        l.setFont(Theme.UI_FONT);
-        l.setForeground(Theme.TREE_TEXT);
+        l.setFont(Theme.uiFont());
+        l.setForeground(Theme.treeText());
         return l;
     }
 
@@ -140,7 +140,7 @@ public final class ConnectionInfoDialog extends JDialog {
         lc.anchor = GridBagConstraints.WEST;
         lc.insets = new Insets(2, 0, 2, 16);
         JLabel key = new JLabel(label);
-        key.setFont(Theme.UI_FONT);
+        key.setFont(Theme.uiFont());
         key.setForeground(new Color(0x5A6B7B));
         grid.add(key, lc);
 
@@ -255,7 +255,7 @@ public final class ConnectionInfoDialog extends JDialog {
 
         KindTab() {
             super(new GridBagLayout());
-            setBackground(Theme.WINDOW_BG);
+            setBackground(Theme.windowBg());
             setBorder(BorderFactory.createEmptyBorder(10, 12, 10, 12));
             int row = 0;
             addRow(this, row++, "Packet loss", packetLoss);

ts3-client/swing/src/main/java/com/ts3client/ui/DescriptionEditorDialog.java

@@ -0,0 +1,171 @@
+package com.ts3client.ui;
+
+import com.ts3client.text.BBCode;
+
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.JButton;
+import javax.swing.JColorChooser;
+import javax.swing.JDialog;
+import javax.swing.JEditorPane;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTextArea;
+import javax.swing.JToggleButton;
+import javax.swing.JToolBar;
+import java.awt.BorderLayout;
+import java.awt.CardLayout;
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.Window;
+
+/**
+ * The description editor TeamSpeak tears off the channel dialog: the raw BBCode plus
+ * the handful of formatting buttons it offers (bold, italic, underline, colour) and a
+ * preview that renders the text the way the info panel will.
+ *
+ * <p>Formatting works on the selection, wrapping it in the tag pair; with nothing
+ * selected the pair is inserted and the caret placed between the two halves, so typing
+ * continues inside it.
+ */
+final class DescriptionEditorDialog extends JDialog {
+
+    private static final String EDIT_CARD = "edit";
+    private static final String PREVIEW_CARD = "preview";
+
+    private final JTextArea area = new JTextArea();
+    private final JEditorPane preview = new JEditorPane("text/html", "");
+    private final CardLayout cards = new CardLayout();
+    private final JPanel body = new JPanel(cards);
+    private final JToggleButton previewButton = new JToggleButton("Preview");
+    private boolean accepted;
+
+    DescriptionEditorDialog(Window owner, String description) {
+        super(owner, "Channel Description", ModalityType.APPLICATION_MODAL);
+        area.setText(description);
+        area.setLineWrap(true);
+        area.setWrapStyleWord(true);
+        area.setFont(new Font(Font.MONOSPACED, Font.PLAIN, 12));
+        area.setCaretPosition(0);
+
+        preview.setEditable(false);
+        preview.setBackground(Theme.chatBg());
+        preview.setBorder(BorderFactory.createEmptyBorder(6, 8, 6, 8));
+
+        body.add(new JScrollPane(area), EDIT_CARD);
+        body.add(new JScrollPane(preview), PREVIEW_CARD);
+
+        JLabel hint = new JLabel("Press Button to \"Preview\" the changes in channel info.");
+        hint.setForeground(Theme.chatSystem());
+        hint.setBorder(BorderFactory.createEmptyBorder(4, 6, 0, 6));
+
+        getContentPane().setLayout(new BorderLayout());
+        getContentPane().add(buildToolbar(), BorderLayout.NORTH);
+        getContentPane().add(body, BorderLayout.CENTER);
+        JPanel south = new JPanel(new BorderLayout());
+        south.add(hint, BorderLayout.NORTH);
+        south.add(buildButtons(), BorderLayout.SOUTH);
+        getContentPane().add(south, BorderLayout.SOUTH);
+
+        Dialogs.closeOnEscape(this);
+        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
+        setSize(new Dimension(520, 380));
+        setMinimumSize(new Dimension(360, 260));
+        setLocationRelativeTo(owner);
+    }
+
+    /** @return whether the user confirmed; {@link #getDescription()} then holds the new text */
+    boolean isAccepted() {
+        return accepted;
+    }
+
+    String getDescription() {
+        return area.getText();
+    }
+
+    private JToolBar buildToolbar() {
+        JToolBar bar = new JToolBar();
+        bar.setFloatable(false);
+        bar.add(tagButton("B", "Bold", Font.BOLD, "[b]", "[/b]"));
+        bar.add(tagButton("I", "Italic", Font.ITALIC, "[i]", "[/i]"));
+        JButton underline = tagButton("<html><u>U</u></html>", "Underline", Font.PLAIN, "[u]", "[/u]");
+        bar.add(underline);
+        JButton color = new JButton("Color");
+        color.setToolTipText("Color");
+        color.addActionListener(a -> chooseColor());
+        bar.add(square(color));
+        bar.add(Box.createHorizontalGlue());
+        previewButton.setToolTipText("Show the description as the info panel renders it");
+        previewButton.addActionListener(a -> showPreview(previewButton.isSelected()));
+        previewButton.setMaximumSize(previewButton.getPreferredSize());
+        bar.add(previewButton);
+        return bar;
+    }
+
+    private JPanel buildButtons() {
+        JButton ok = new JButton("OK");
+        JButton cancel = new JButton("Cancel");
+        ok.addActionListener(a -> {
+            accepted = true;
+            dispose();
+        });
+        cancel.addActionListener(a -> dispose());
+        JPanel panel = new JPanel(new BorderLayout());
+        JPanel right = new JPanel();
+        right.add(ok);
+        right.add(cancel);
+        panel.add(right, BorderLayout.EAST);
+        getRootPane().setDefaultButton(ok);
+        return panel;
+    }
+
+    private JButton tagButton(String text, String tip, int style, String open, String close) {
+        JButton button = new JButton(text);
+        button.setToolTipText(tip);
+        button.setFont(button.getFont().deriveFont(style));
+        button.addActionListener(a -> wrapSelection(open, close));
+        return square(button);
+    }
+
+    /**
+     * Pins a toolbar button to its natural size: the tool bar lays its children out along a
+     * box, which would otherwise let one of them soak up all the free width.
+     */
+    private static JButton square(JButton button) {
+        Dimension size = new Dimension(Math.max(28, button.getPreferredSize().width),
+                button.getPreferredSize().height);
+        button.setPreferredSize(size);
+        button.setMaximumSize(size);
+        return button;
+    }
+
+    private void chooseColor() {
+        Color chosen = JColorChooser.showDialog(this, "Color", Color.BLACK);
+        if (chosen == null) return;
+        wrapSelection(String.format("[color=#%02x%02x%02x]",
+                chosen.getRed(), chosen.getGreen(), chosen.getBlue()), "[/color]");
+    }
+
+    /** Wraps the selection (or the caret) in a BBCode tag pair and returns focus to the text. */
+    private void wrapSelection(String open, String close) {
+        if (previewButton.isSelected()) showPreview(false);
+        int start = area.getSelectionStart();
+        int end = area.getSelectionEnd();
+        String selected = area.getSelectedText();
+        area.replaceRange(open + (selected == null ? "" : selected) + close, start, end);
+        area.setCaretPosition(start + open.length() + (selected == null ? 0 : selected.length()));
+        area.requestFocusInWindow();
+    }
+
+    private void showPreview(boolean on) {
+        previewButton.setSelected(on);
+        if (on) {
+            preview.setText("<html><body style=\"font-family:sans-serif;font-size:9pt\">"
+                    + BBCode.toHtml(area.getText()) + "</body></html>");
+            preview.setCaretPosition(0);
+        }
+        cards.show(body, on ? PREVIEW_CARD : EDIT_CARD);
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/DesignPanel.java

@@ -26,13 +26,14 @@ import java.awt.Insets;
 import java.io.File;
 
 /**
- * Options page for icon packs: which pack the user interface is drawn with, where
- * to look for more of them, and a viewer showing everything the pack contains.
+ * Options page for how the client looks: the light or dark look-and-feel, and the icon
+ * pack the user interface is drawn with — where to look for more of them, and a viewer
+ * showing everything the active pack contains.
  *
- * <p>Picking a pack applies it right away so the change can be seen in the window
- * behind the dialog; cancelling puts the previous one back.
+ * <p>Both apply right away so the change can be seen in the window behind the dialog;
+ * cancelling puts the previous ones back.
  */
-final class IconPackPanel extends JPanel {
+final class DesignPanel extends JPanel {
 
     /** Size of the tiles in the icon viewer. */
     private static final int PREVIEW_SIZE = 32;
@@ -44,18 +45,22 @@ final class IconPackPanel extends JPanel {
     private final Settings settings;
     private final String originalPackId;
     private final String originalPackDir;
+    private final Settings.Appearance originalAppearance;
 
+    private final JComboBox<Settings.Appearance> appearanceCombo =
+            new JComboBox<>(Settings.Appearance.values());
     private final JComboBox<Object> packCombo = new JComboBox<>();
     private final JLabel packInfo = new JLabel();
     private final JTextField packDirField;
     private final DefaultListModel<String> previewModel = new DefaultListModel<>();
     private final JList<String> preview = new JList<>(previewModel);
 
-    IconPackPanel(Settings settings) {
+    DesignPanel(Settings settings) {
         super(new BorderLayout(0, 8));
         this.settings = settings;
         this.originalPackId = settings.iconPack;
         this.originalPackDir = settings.iconPackDir;
+        this.originalAppearance = settings.appearance;
         this.packDirField = new JTextField(settings.iconPackDir, 18);
 
         setBorder(BorderFactory.createEmptyBorder(12, 12, 12, 12));
@@ -65,18 +70,23 @@ final class IconPackPanel extends JPanel {
         reloadPacks();
     }
 
-    /** Copies the chosen pack into the settings; the caller saves them. */
+    /** Copies the chosen appearance and pack into the settings; the caller saves them. */
     void apply() {
+        settings.appearance = selectedAppearance();
         settings.iconPackDir = packDirField.getText().trim();
         Object selected = packCombo.getSelectedItem();
         settings.iconPack = selected instanceof IconPack pack ? pack.id() : "";
     }
 
-    /** Puts back the pack the dialog started with, for a cancelled edit. */
+    /** Puts back the appearance and pack the dialog started with, for a cancelled edit. */
     void revert() {
         settings.iconPack = originalPackId;
         settings.iconPackDir = originalPackDir;
         IconTheme.get().reload(settings);
+        if (settings.appearance != originalAppearance) {
+            settings.appearance = originalAppearance;
+            LookAndFeelManager.switchTo(originalAppearance);
+        }
     }
 
     // ---- layout ----
@@ -100,7 +110,21 @@ final class IconPackPanel extends JPanel {
             }
         });
 
+        appearanceCombo.setToolTipText("Light or dark window colours");
+        appearanceCombo.setSelectedItem(settings.appearance);
+        appearanceCombo.setRenderer(new DefaultListCellRenderer() {
+            @Override
+            public Component getListCellRendererComponent(JList<?> list, Object value, int index,
+                                                          boolean selected, boolean focus) {
+                super.getListCellRendererComponent(list, value, index, selected, focus);
+                setText(value == Settings.Appearance.DARK ? "Dark" : "Light");
+                return this;
+            }
+        });
+        appearanceCombo.addActionListener(e -> onAppearanceSelected());
+
         int row = 0;
+        addRow(p, c, row++, new JLabel("Theme:"), appearanceCombo);
         addRow(p, c, row++, new JLabel("Icon pack:"), packCombo);
         c.gridx = 1;
         c.gridy = row++;
@@ -159,6 +183,18 @@ final class IconPackPanel extends JPanel {
         onPackSelected();
     }
 
+    private Settings.Appearance selectedAppearance() {
+        Object selected = appearanceCombo.getSelectedItem();
+        return selected instanceof Settings.Appearance a ? a : Settings.Appearance.LIGHT;
+    }
+
+    private void onAppearanceSelected() {
+        Settings.Appearance chosen = selectedAppearance();
+        if (chosen == settings.appearance) return;
+        settings.appearance = chosen;
+        LookAndFeelManager.switchTo(chosen);
+    }
+
     private void onPackSelected() {
         Object selected = packCombo.getSelectedItem();
         IconPack pack = selected instanceof IconPack p ? p : null;

ts3-client/swing/src/main/java/com/ts3client/ui/DevicesPanel.java

@@ -0,0 +1,160 @@
+package com.ts3client.ui;
+
+import com.ts3client.audio.VoiceInput;
+import com.ts3client.audio.VoiceOutput;
+import com.ts3client.audio.desktop.AudioDevices;
+import com.ts3client.config.Settings;
+
+import javax.swing.Box;
+import javax.swing.JCheckBox;
+import javax.swing.JComboBox;
+import javax.swing.JLabel;
+import javax.swing.JSlider;
+import java.awt.GridBagConstraints;
+import java.awt.Insets;
+import java.util.List;
+import java.util.function.Consumer;
+
+/**
+ * Options dialog's "Playback / Capture" tab: device pickers, gain/volume, and the
+ * noise-reduction pre-processing options. Gain and pre-processing changes are pushed
+ * live via {@code applyLive}, which reaches both the connected microphone and the
+ * dialog's own microphone test.
+ */
+final class DevicesPanel extends FormPanel {
+
+    private final JComboBox<AudioDevices.Device> inputCombo;
+    private final JComboBox<AudioDevices.Device> outputCombo;
+    private final JSlider inputGain;
+    private final JSlider outputVol;
+    private final JCheckBox denoiseCheck;
+    private final JSlider denoiseLevel;
+    private final JCheckBox typingCheck;
+    private final JCheckBox agcCheck;
+
+    DevicesPanel(Settings settings, VoiceOutput livePlayback,
+                 Consumer<Consumer<VoiceInput>> applyLive,
+                 Runnable onInputDeviceChanged, Consumer<String> onOutputDeviceChanged) {
+        GridBagConstraints c = gbc();
+
+        List<AudioDevices.Device> ins = AudioDevices.inputDevices();
+        List<AudioDevices.Device> outs = AudioDevices.outputDevices();
+
+        inputCombo = new JComboBox<>(ins.toArray(new AudioDevices.Device[0]));
+        outputCombo = new JComboBox<>(outs.toArray(new AudioDevices.Device[0]));
+        selectOrDefault(inputCombo, settings.inputDevice);
+        selectOrDefault(outputCombo, settings.outputDevice);
+
+        String deviceHint = "<html>Named devices are PipeWire's, and are routed through it "
+                + "(so per-application volume and rerouting keep working).<br>"
+                + "<b>ALSA:</b> entries talk to the sound card directly, taking it exclusively.</html>";
+        inputCombo.setToolTipText(deviceHint);
+        outputCombo.setToolTipText(deviceHint);
+        limitWidth(inputCombo, FIELD_WIDTH);
+        limitWidth(outputCombo, FIELD_WIDTH);
+
+        int row = 0;
+        addRow(this, c, row++, new JLabel("Capture device (microphone):"), inputCombo);
+        addRow(this, c, row++, new JLabel("Playback device (speakers):"), outputCombo);
+
+        inputGain = new JSlider(0, 200, (int) Math.round(settings.inputVolume * 100));
+        outputVol = new JSlider(0, 200, (int) Math.round(settings.outputVolume * 100));
+        limitWidth(inputGain, SLIDER_WIDTH);
+        limitWidth(outputVol, SLIDER_WIDTH);
+        addRow(this, c, row++, new JLabel("Microphone gain:"), inputGain);
+        addRow(this, c, row++, new JLabel("Playback volume:"), outputVol);
+
+        outputVol.addChangeListener(e -> {
+            if (livePlayback != null) livePlayback.setMasterVolume(outputVol.getValue() / 100.0);
+        });
+        inputGain.addChangeListener(e ->
+                applyLive.accept(m -> m.setInputGain(inputGain.getValue() / 100.0)));
+        inputCombo.addActionListener(e -> onInputDeviceChanged.run());
+        outputCombo.addActionListener(e -> onOutputDeviceChanged.accept(comboValue(outputCombo)));
+
+        c.gridx = 0;
+        c.gridy = row++;
+        c.gridwidth = 2;
+        c.insets = new Insets(14, 4, 2, 4);
+        add(new JLabel("Noise reduction"), c);
+        c.insets = new Insets(4, 4, 4, 4);
+        c.gridwidth = 1;
+
+        denoiseCheck = new JCheckBox("Remove background noise", settings.denoise);
+        denoiseCheck.setToolTipText("Attempt to filter out background noises.");
+        denoiseLevel = new JSlider(0, 100, (int) Math.round(settings.denoiserLevel * 100));
+        limitWidth(denoiseLevel, SLIDER_WIDTH);
+        denoiseLevel.setToolTipText("Higher = more aggressive noise removal.");
+        typingCheck = new JCheckBox("Typing attenuation", settings.typingAttenuation);
+        typingCheck.setToolTipText("<html><b>Typing attenuation</b> tries to detect and "
+                + "reduce the sounds made by typing.</html>");
+        agcCheck = new JCheckBox("Automatic gain control (AGC)", settings.agc);
+        agcCheck.setToolTipText("<html><b>Automatic gain control</b> normalises your "
+                + "microphone loudness to a target level, boosting quiet mics and taming "
+                + "loud ones.</html>");
+
+        c.gridx = 0;
+        c.gridy = row++;
+        c.gridwidth = 2;
+        add(denoiseCheck, c);
+        c.gridwidth = 1;
+        addRow(this, c, row++, new JLabel("Noise removal level:"), denoiseLevel);
+        c.gridx = 0;
+        c.gridy = row++;
+        c.gridwidth = 2;
+        add(typingCheck, c);
+        c.gridy = row++;
+        add(agcCheck, c);
+        c.gridwidth = 1;
+
+        Runnable syncNoise = () -> {
+            denoiseLevel.setEnabled(denoiseCheck.isSelected());
+            applyLive.accept(m -> {
+                m.setNoiseSuppression(denoiseCheck.isSelected());
+                m.setDenoiserLevel(denoiseLevel.getValue() / 100.0);
+                m.setTypingAttenuation(typingCheck.isSelected());
+                m.setAgc(agcCheck.isSelected());
+            });
+        };
+        denoiseCheck.addActionListener(e -> syncNoise.run());
+        typingCheck.addActionListener(e -> syncNoise.run());
+        agcCheck.addActionListener(e -> syncNoise.run());
+        denoiseLevel.addChangeListener(e ->
+                applyLive.accept(m -> m.setDenoiserLevel(denoiseLevel.getValue() / 100.0)));
+        syncNoise.run();
+
+        c.gridx = 0;
+        c.gridy = row;
+        c.weighty = 1;
+        add(Box.createGlue(), c);
+    }
+
+    /** Copies the form into {@code target}, without touching anything else. */
+    void writeInto(Settings target) {
+        target.inputDevice = comboValue(inputCombo);
+        target.outputDevice = comboValue(outputCombo);
+        target.inputVolume = inputGain.getValue() / 100.0;
+        target.outputVolume = outputVol.getValue() / 100.0;
+        target.denoise = denoiseCheck.isSelected();
+        target.denoiserLevel = denoiseLevel.getValue() / 100.0;
+        target.typingAttenuation = typingCheck.isSelected();
+        target.agc = agcCheck.isSelected();
+    }
+
+    private static void selectOrDefault(JComboBox<AudioDevices.Device> combo, String deviceId) {
+        if (deviceId != null && !deviceId.isEmpty()) {
+            for (int i = 0; i < combo.getItemCount(); i++) {
+                if (deviceId.equals(combo.getItemAt(i).id())) {
+                    combo.setSelectedIndex(i);
+                    return;
+                }
+            }
+        }
+        combo.setSelectedIndex(0);
+    }
+
+    private static String comboValue(JComboBox<AudioDevices.Device> combo) {
+        AudioDevices.Device d = (AudioDevices.Device) combo.getSelectedItem();
+        return d == null ? "" : d.id();
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/DropIndicatorTree.java

@@ -0,0 +1,284 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.ChannelNode;
+import com.ts3client.net.ClientEntry;
+import com.ts3client.net.ServerModel;
+
+import javax.swing.Icon;
+import javax.swing.JTree;
+import javax.swing.tree.DefaultMutableTreeNode;
+import javax.swing.tree.TreeModel;
+import javax.swing.tree.TreePath;
+import java.awt.BasicStroke;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.RenderingHints;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.List;
+import java.util.function.Predicate;
+
+/**
+ * The {@link ServerTreePanel} tree, extended to draw where a drag-and-drop would
+ * land: an insertion line between rows, or an outline around the row that will
+ * receive the dragged node. Also keeps the server row permanently expanded and
+ * paints the right-aligned group icon strip, both of which need to hook into
+ * this component's own paint cycle.
+ */
+final class DropIndicatorTree extends JTree {
+
+    /** Gap kept between a row's label and the right-aligned icon strip. */
+    private static final int BADGE_GAP = 8;
+    /** Inset of the strip from the visible right edge. */
+    private static final int BADGE_MARGIN = 4;
+
+    private final ServerModel model;
+    private final GroupIcons groupIcons;
+    /** Set while a drop would move a client into this channel row. */
+    private TreePath highlight;
+    /** The row the pointer is over, or -1 when it is over none. */
+    private int hoverRow = -1;
+    private Predicate<TreePath> pathEditable = path -> false;
+
+    DropIndicatorTree(TreeModel treeModel, ServerModel model, GroupIcons groupIcons) {
+        super(treeModel);
+        this.model = model;
+        this.groupIcons = groupIcons;
+        MouseAdapter hover = new MouseAdapter() {
+            @Override
+            public void mouseMoved(MouseEvent e) {
+                setHoverRow(rowAt(e.getY()));
+            }
+
+            @Override
+            public void mouseDragged(MouseEvent e) {
+                setHoverRow(-1);
+            }
+
+            @Override
+            public void mouseExited(MouseEvent e) {
+                setHoverRow(-1);
+            }
+        };
+        addMouseMotionListener(hover);
+        addMouseListener(hover);
+        // The selected row is filled across the full width below, before the rows
+        // themselves are drawn, so this component must not clear its own background.
+        setOpaque(false);
+    }
+
+    /**
+     * The row a point falls on, going by its vertical band alone: a row reaches
+     * across the whole width, not just as far as its label.
+     */
+    int rowAt(int y) {
+        int row = getClosestRowForLocation(0, y);
+        if (row < 0) return -1;
+        Rectangle bounds = getRowBounds(row);
+        return bounds != null && y >= bounds.y && y < bounds.y + bounds.height ? row : -1;
+    }
+
+    /** The path a point falls on, by the same rule as {@link #rowAt(int)}. */
+    TreePath pathAt(int y) {
+        int row = rowAt(y);
+        return row < 0 ? null : getPathForRow(row);
+    }
+
+    /**
+     * Re-reads the row the pointer is over. Scrolling moves the rows under a pointer
+     * that never moved itself, so the enclosing scroll pane calls this on every scroll.
+     */
+    void refreshHoverRow() {
+        Point pointer = getMousePosition();
+        setHoverRow(pointer == null ? -1 : rowAt(pointer.y));
+    }
+
+    private void setHoverRow(int row) {
+        if (row == hoverRow) return;
+        repaintRow(hoverRow);
+        hoverRow = row;
+        repaintRow(row);
+    }
+
+    private void repaintRow(int row) {
+        if (row < 0) return;
+        Rectangle bounds = getRowBounds(row);
+        if (bounds != null) repaint(0, bounds.y, getWidth(), bounds.height);
+    }
+
+    /** Which rows an inline editor may open on; nothing, until one is installed. */
+    void setPathEditable(Predicate<TreePath> editable) {
+        this.pathEditable = editable;
+    }
+
+    @Override
+    public boolean isPathEditable(TreePath path) {
+        return isEditable() && pathEditable.test(path);
+    }
+
+    /** Keeps the server row permanently open; collapsing it would hide everything. */
+    @Override
+    public void setExpandedState(TreePath path, boolean state) {
+        if (!state && path.getPathCount() == 1) return;
+        super.setExpandedState(path, state);
+    }
+
+    /**
+     * Widens every repaint request to the full visible width. Swing only asks for
+     * the row rectangle, which stops short of the right-aligned icon strip and would
+     * leave it behind when a row's label changes width.
+     */
+    @Override
+    public void repaint(long tm, int x, int y, int width, int height) {
+        Rectangle visible = getVisibleRect();
+        super.repaint(tm, visible.x, y, visible.width, height);
+    }
+
+    void highlightChannel(TreePath path) {
+        if (path == highlight || (path != null && path.equals(highlight))) return;
+        highlight = path;
+        repaint();
+    }
+
+    @Override
+    protected void paintComponent(Graphics g) {
+        Rectangle clip = g.getClipBounds();
+        g.setColor(getBackground());
+        g.fillRect(clip.x, clip.y, clip.width, clip.height);
+        paintSelection(g);
+        paintHover(g);
+        super.paintComponent(g);
+        paintBadges(g);
+        JTree.DropLocation loc = getDropLocation();
+        if (loc == null || loc.getPath() == null) return;
+
+        Graphics2D g2 = (Graphics2D) g.create();
+        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+        g2.setColor(Theme.accent());
+        if (highlight != null || loc.getChildIndex() < 0) {
+            Rectangle r = getPathBounds(highlight != null ? highlight : loc.getPath());
+            if (r != null) {
+                g2.setStroke(new BasicStroke(2f));
+                g2.drawRoundRect(r.x, r.y + 1, r.width - 1, r.height - 3, 4, 4);
+            }
+        } else {
+            Rectangle line = insertLine(loc);
+            if (line != null) {
+                g2.fillRect(line.x, line.y - 1, line.width, 2);
+                g2.fillOval(line.x - 3, line.y - 4, 7, 7);
+            }
+        }
+        g2.dispose();
+    }
+
+    /**
+     * Fills the selected row across the full width, in the colour the cell renderer
+     * puts behind the label itself, so the selection covers the whole line rather
+     * than stopping where the name ends.
+     */
+    private void paintSelection(Graphics g) {
+        int[] rows = getSelectionRows();
+        if (rows == null) return;
+        Rectangle visible = getVisibleRect();
+        g.setColor(Theme.treeSelection());
+        for (int row : rows) {
+            Rectangle bounds = getRowBounds(row);
+            if (bounds != null) g.fillRect(visible.x, bounds.y, visible.width, bounds.height);
+        }
+    }
+
+    /**
+     * Washes the row under the pointer across the full width it occupies — the same
+     * area a click on it acts on. A selected row keeps its selection colour, and
+     * spacers, which nothing can be done with, are left alone.
+     */
+    private void paintHover(Graphics g) {
+        if (hoverRow < 0 || getDropLocation() != null || isRowSelected(hoverRow)) return;
+        Rectangle bounds = getRowBounds(hoverRow);
+        TreePath path = getPathForRow(hoverRow);
+        if (bounds == null || path == null || isSpacer(path)) return;
+
+        Rectangle visible = getVisibleRect();
+        g.setColor(Theme.hover());
+        g.fillRect(visible.x, bounds.y, visible.width, bounds.height);
+    }
+
+    private boolean isSpacer(TreePath path) {
+        Object obj = ((DefaultMutableTreeNode) path.getLastPathComponent()).getUserObject();
+        return obj instanceof ChannelNode && Spacers.isSpacer(((ChannelNode) obj).name);
+    }
+
+    /** The 1px-tall strip where the insertion line goes, in tree coordinates. */
+    private Rectangle insertLine(JTree.DropLocation loc) {
+        DefaultMutableTreeNode parent = (DefaultMutableTreeNode) loc.getPath().getLastPathComponent();
+        int index = loc.getChildIndex();
+        if (index < parent.getChildCount()) {
+            Rectangle r = getPathBounds(loc.getPath().pathByAddingChild(parent.getChildAt(index)));
+            return r == null ? null : new Rectangle(r.x, r.y, getWidth() - r.x, 2);
+        }
+        if (parent.getChildCount() == 0) {
+            Rectangle r = getPathBounds(loc.getPath());
+            if (r == null) return null;
+            int x = r.x + getRowHeight();
+            return new Rectangle(x, r.y + r.height, getWidth() - x, 2);
+        }
+        // Past the last child: below that child's whole (expanded) subtree.
+        TreePath lastChild = loc.getPath().pathByAddingChild(parent.getChildAt(parent.getChildCount() - 1));
+        Rectangle head = getPathBounds(lastChild);
+        Rectangle tail = getPathBounds(lastVisibleRow(lastChild));
+        if (head == null || tail == null) return null;
+        return new Rectangle(head.x, tail.y + tail.height, getWidth() - head.x, 2);
+    }
+
+    private TreePath lastVisibleRow(TreePath path) {
+        int row = getRowForPath(path);
+        if (row < 0) return path;
+        for (int i = row + 1; i < getRowCount(); i++) {
+            if (!path.isDescendant(getPathForRow(i))) break;
+            row = i;
+        }
+        return getPathForRow(row);
+    }
+
+    /**
+     * Paints the icons of every visible row — a client's group icons, a channel's
+     * own icon — flush with the right edge of the viewport, the way TeamSpeak lines
+     * them up. Drawing them separately from the cell renderer keeps the rows'
+     * measured widths (and thus the selection highlight) tied to the label alone.
+     */
+    private void paintBadges(Graphics g) {
+        Rectangle visible = getVisibleRect();
+        int right = visible.x + visible.width - BADGE_MARGIN;
+        for (int row = 0; row < getRowCount(); row++) {
+            Rectangle bounds = getRowBounds(row);
+            if (bounds == null || bounds.y + bounds.height < visible.y) continue;
+            if (bounds.y > visible.y + visible.height) break;
+
+            TreePath path = getPathForRow(row);
+            Object obj = ((DefaultMutableTreeNode) path.getLastPathComponent()).getUserObject();
+            List<Icon> icons = badgesOf(obj);
+            if (icons.isEmpty()) continue;
+
+            GroupIcons.Row strip = new GroupIcons.Row(icons);
+            int x = Math.max(bounds.x + bounds.width + BADGE_GAP, right - strip.getIconWidth());
+            strip.paintIcon(this, g, x, bounds.y + (bounds.height - strip.getIconHeight()) / 2);
+        }
+    }
+
+    /** The icon strip a row shows on its right, empty when it has none (yet). */
+    private List<Icon> badgesOf(Object node) {
+        if (node instanceof ClientEntry) {
+            ClientEntry cl = (ClientEntry) node;
+            return groupIcons.iconsOf(
+                    model.serverGroupsOf(cl.serverGroupIds), model.channelGroup(cl.channelGroupId));
+        }
+        if (node instanceof ChannelNode) {
+            ChannelNode ch = (ChannelNode) node;
+            Icon icon = Spacers.isSpacer(ch.name) ? null : groupIcons.icon(ch.iconId);
+            if (icon != null) return List.of(icon);
+        }
+        return List.of();
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/FileBrowserDialog.java

@@ -66,7 +66,7 @@ public final class FileBrowserDialog extends JDialog {
         this.channelPassword = "";
 
         JPanel content = new JPanel(new BorderLayout(0, 8));
-        content.setBackground(Theme.WINDOW_BG);
+        content.setBackground(Theme.windowBg());
         content.setBorder(BorderFactory.createEmptyBorder(10, 12, 10, 12));
         content.add(buildToolbar(), BorderLayout.NORTH);
         content.add(buildTable(), BorderLayout.CENTER);
@@ -85,7 +85,7 @@ public final class FileBrowserDialog extends JDialog {
     private JPanel buildToolbar() {
         JPanel bar = new JPanel();
         bar.setLayout(new BoxLayout(bar, BoxLayout.X_AXIS));
-        bar.setBackground(Theme.WINDOW_BG);
+        bar.setBackground(Theme.windowBg());
 
         upButton.addActionListener(e -> navigateUp());
         JButton refresh = new JButton("Refresh", Icons.of("FILE_REFRESH"));
@@ -111,13 +111,13 @@ public final class FileBrowserDialog extends JDialog {
         bar.add(Box.createHorizontalStrut(6));
         bar.add(deleteButton);
 
-        pathLabel.setFont(Theme.UI_FONT);
-        pathLabel.setForeground(Theme.TREE_TEXT);
+        pathLabel.setFont(Theme.uiFont());
+        pathLabel.setForeground(Theme.treeText());
         return bar;
     }
 
     private JScrollPane buildTable() {
-        table.setFont(Theme.UI_FONT);
+        table.setFont(Theme.uiFont());
         table.setRowHeight(20);
         table.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
         table.setFillsViewportHeight(true);
@@ -137,17 +137,17 @@ public final class FileBrowserDialog extends JDialog {
             }
         });
         JScrollPane scroll = new JScrollPane(table);
-        scroll.getViewport().setBackground(Theme.TREE_BG);
+        scroll.getViewport().setBackground(Theme.treeBg());
         return scroll;
     }
 
     private JScrollPane buildTransfers() {
         transfersPanel.setLayout(new BoxLayout(transfersPanel, BoxLayout.Y_AXIS));
-        transfersPanel.setBackground(Theme.WINDOW_BG);
+        transfersPanel.setBackground(Theme.windowBg());
         JScrollPane scroll = new JScrollPane(transfersPanel);
         scroll.setBorder(BorderFactory.createTitledBorder("Transfers"));
         scroll.setPreferredSize(new Dimension(10, 120));
-        scroll.getViewport().setBackground(Theme.WINDOW_BG);
+        scroll.getViewport().setBackground(Theme.windowBg());
         return scroll;
     }
 
@@ -326,10 +326,10 @@ public final class FileBrowserDialog extends JDialog {
 
         TransferRow() {
             setLayout(new BorderLayout(8, 0));
-            setBackground(Theme.WINDOW_BG);
+            setBackground(Theme.windowBg());
             setBorder(BorderFactory.createEmptyBorder(3, 2, 3, 2));
             setMaximumSize(new Dimension(Integer.MAX_VALUE, 44));
-            label.setFont(Theme.UI_FONT);
+            label.setFont(Theme.uiFont());
             bar.setStringPainted(true);
             add(label, BorderLayout.NORTH);
             add(bar, BorderLayout.CENTER);

ts3-client/swing/src/main/java/com/ts3client/ui/FormPanel.java

@@ -0,0 +1,104 @@
+package com.ts3client.ui;
+
+import javax.swing.BorderFactory;
+import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JSlider;
+import javax.swing.Scrollable;
+import java.awt.BorderLayout;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+import java.awt.Rectangle;
+
+/**
+ * Base for a settings tab's field grid: follows the scroll pane's width instead of
+ * demanding its own preferred one, so rows stay inside the dialog instead of scrolling
+ * sideways. Also holds the small GridBagLayout helpers every such tab needs.
+ */
+class FormPanel extends JPanel implements Scrollable {
+
+    static final int FIELD_WIDTH = 240;
+    static final int SLIDER_WIDTH = 200;
+    static final int MIN_FIELD_WIDTH = 60;
+
+    FormPanel() {
+        super(new GridBagLayout());
+        setBorder(BorderFactory.createEmptyBorder(12, 12, 12, 12));
+    }
+
+    @Override
+    public Dimension getPreferredScrollableViewportSize() {
+        return getPreferredSize();
+    }
+
+    @Override
+    public int getScrollableUnitIncrement(Rectangle visible, int orientation, int direction) {
+        return 16;
+    }
+
+    @Override
+    public int getScrollableBlockIncrement(Rectangle visible, int orientation, int direction) {
+        return visible.height;
+    }
+
+    @Override
+    public boolean getScrollableTracksViewportWidth() {
+        return true;
+    }
+
+    @Override
+    public boolean getScrollableTracksViewportHeight() {
+        return false;
+    }
+
+    static GridBagConstraints gbc() {
+        GridBagConstraints c = new GridBagConstraints();
+        c.insets = new Insets(4, 4, 4, 4);
+        c.anchor = GridBagConstraints.WEST;
+        c.fill = GridBagConstraints.HORIZONTAL;
+        return c;
+    }
+
+    static void addRow(JPanel p, GridBagConstraints c, int row, JLabel label, Component field) {
+        c.gridx = 0;
+        c.gridy = row;
+        c.weightx = 0;
+        c.gridwidth = 1;
+        p.add(label, c);
+        c.gridx = 1;
+        c.weightx = 1;
+        p.add(field, c);
+    }
+
+    /**
+     * Caps a field's preferred width and lets it shrink: long device names and wide sliders
+     * would otherwise force the form past the dialog's edge, where the scroll pane (which
+     * never scrolls horizontally) simply clips them.
+     */
+    static void limitWidth(JComponent comp, int preferredWidth) {
+        int height = comp.getPreferredSize().height;
+        comp.setPreferredSize(new Dimension(preferredWidth, height));
+        comp.setMinimumSize(new Dimension(MIN_FIELD_WIDTH, height));
+    }
+
+    static JPanel sliderWithLabel(JSlider slider, JLabel valueLabel) {
+        return sliderWithLabel(slider, valueLabel, 48);
+    }
+
+    /**
+     * Pairs a slider with its value readout. The readout gets a fixed width wide enough for
+     * the longest value so the slider does not jump around as it is dragged.
+     */
+    static JPanel sliderWithLabel(JSlider slider, JLabel valueLabel, int labelWidth) {
+        JPanel panel = new JPanel(new BorderLayout(6, 0));
+        limitWidth(slider, SLIDER_WIDTH);
+        panel.add(slider, BorderLayout.CENTER);
+        valueLabel.setPreferredSize(new Dimension(labelWidth, valueLabel.getPreferredSize().height));
+        panel.add(valueLabel, BorderLayout.EAST);
+        return panel;
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/HotkeyActions.java

@@ -0,0 +1,160 @@
+package com.ts3client.ui;
+
+import com.ts3client.hotkey.Hotkey;
+import com.ts3client.hotkey.HotkeyEngine;
+
+import javax.swing.SwingUtilities;
+import java.util.List;
+
+/**
+ * Carries a fired hotkey out on the client.
+ *
+ * <p>Activations arrive on the input hook's thread, so everything is handed to the
+ * event dispatch thread first. Which connections an action reaches is the binding's
+ * "on active server" flag: set, only the selected tab; clear, every connected one.
+ */
+final class HotkeyActions implements HotkeyEngine.Handler {
+
+    /** How much one press of the master-volume hotkeys moves the slider. */
+    private static final double VOLUME_STEP = 0.05;
+
+    private final MainFrame frame;
+    /** Latched push-to-talk, driven by the "Toggle Push-to-Talk" action. */
+    private boolean pttLatched;
+
+    HotkeyActions(MainFrame frame) {
+        this.frame = frame;
+    }
+
+    @Override
+    public void onHotkey(Hotkey hotkey, boolean active) {
+        SwingUtilities.invokeLater(() -> perform(hotkey, active));
+    }
+
+    private void perform(Hotkey hotkey, boolean active) {
+        List<ServerTab> targets = frame.hotkeyTargets(hotkey.activeServerOnly);
+        switch (hotkey.action) {
+            case CONNECT_CURRENT_TAB -> frame.connectBookmark(hotkey.argument, false);
+            case CONNECT_NEW_TAB -> frame.connectBookmark(hotkey.argument, true);
+            case DISCONNECT_CURRENT -> {
+                ServerTab tab = frame.selectedTab();
+                if (tab != null) tab.disconnect();
+            }
+            case DISCONNECT_ALL -> {
+                for (ServerTab tab : frame.allTabs()) tab.disconnect();
+            }
+
+            case MIC_ACTIVATE -> frame.moveMicrophoneToSelectedTab();
+            case MIC_MUTE -> setMicMuted(targets, true);
+            case MIC_UNMUTE -> setMicMuted(targets, false);
+            case MIC_TOGGLE -> setMicMuted(targets, !anyMicMuted(targets));
+
+            case MIC_LOCAL_MUTE -> setMicLocalMuted(targets, true);
+            case MIC_LOCAL_UNMUTE -> setMicLocalMuted(targets, false);
+            case MIC_LOCAL_TOGGLE -> setMicLocalMuted(targets, !anyMicLocalMuted(targets));
+
+            case SPEAKER_MUTE -> setDeafened(targets, true);
+            case SPEAKER_UNMUTE -> setDeafened(targets, false);
+            case SPEAKER_TOGGLE -> setDeafened(targets, !anyDeafened(targets));
+
+            case AWAY_SET -> setAway(targets, true, "");
+            case AWAY_ONLINE -> setAway(targets, false, "");
+            case AWAY_TOGGLE -> setAway(targets, !anyAway(targets), "");
+            case AWAY_TOGGLE_WITH_MESSAGE -> setAway(targets, !anyAway(targets), hotkey.argument);
+
+            case COMMANDER_ACTIVATE -> setCommander(targets, true);
+            case COMMANDER_DEACTIVATE -> setCommander(targets, false);
+            case COMMANDER_TOGGLE -> setCommander(targets, !anyCommander(targets));
+
+            // Momentary: the engine reports the release too, so the key simply holds it open.
+            case PTT_ACTIVATE -> frame.setPushToTalk(active || pttLatched);
+            case PTT_DEACTIVATE -> {
+                pttLatched = false;
+                frame.setPushToTalk(false);
+            }
+            case PTT_TOGGLE -> {
+                pttLatched = !pttLatched;
+                frame.setPushToTalk(pttLatched);
+            }
+
+            case CHANNEL_SWITCH -> {
+                for (ServerTab tab : targets) tab.joinChannelPath(hotkey.argument);
+            }
+            case SERVER_TAB_SELECT -> frame.selectTabNumber(parseIndex(hotkey.argument));
+            case SERVER_TAB_NEXT -> frame.stepTab(1);
+            case SERVER_TAB_PREVIOUS -> frame.stepTab(-1);
+
+            case SOUND_MUTE -> frame.setSoundsMuted(true);
+            case SOUND_UNMUTE -> frame.setSoundsMuted(false);
+            case SOUND_TOGGLE -> frame.setSoundsMuted(!frame.areSoundsMuted());
+
+            case VOLUME_INCREASE -> frame.adjustMasterVolume(VOLUME_STEP);
+            case VOLUME_DECREASE -> frame.adjustMasterVolume(-VOLUME_STEP);
+
+            case NICKNAME_CHANGE -> frame.changeNickname(hotkey.argument);
+
+            case FILEBROWSER -> frame.browseCurrentChannel();
+            case SKIN_RELOAD -> frame.reloadSkin();
+            case BRING_TO_FRONT -> frame.bringToFront();
+            case SEND_TO_BACK -> frame.sendToBack();
+
+            default -> {
+                // Listed for completeness in the action catalogue, but not implemented here.
+            }
+        }
+    }
+
+    private void setMicMuted(List<ServerTab> targets, boolean muted) {
+        for (ServerTab tab : targets) tab.setMicMuted(muted);
+        frame.refreshAfterHotkey();
+    }
+
+    private void setMicLocalMuted(List<ServerTab> targets, boolean muted) {
+        for (ServerTab tab : targets) tab.setMicLocalMuted(muted);
+        frame.refreshAfterHotkey();
+    }
+
+    private void setDeafened(List<ServerTab> targets, boolean deaf) {
+        for (ServerTab tab : targets) tab.setDeafened(deaf);
+        frame.refreshAfterHotkey();
+    }
+
+    private void setAway(List<ServerTab> targets, boolean away, String message) {
+        for (ServerTab tab : targets) tab.setAway(away, message == null ? "" : message);
+        frame.refreshAfterHotkey();
+    }
+
+    private void setCommander(List<ServerTab> targets, boolean commander) {
+        for (ServerTab tab : targets) tab.setCommander(commander);
+        frame.refreshAfterHotkey();
+    }
+
+    private static boolean anyMicMuted(List<ServerTab> tabs) {
+        return tabs.stream().anyMatch(ServerTab::isMicMuted);
+    }
+
+    private static boolean anyMicLocalMuted(List<ServerTab> tabs) {
+        return tabs.stream().anyMatch(ServerTab::isMicLocalMuted);
+    }
+
+    private static boolean anyDeafened(List<ServerTab> tabs) {
+        return tabs.stream().anyMatch(ServerTab::isDeafened);
+    }
+
+    private static boolean anyAway(List<ServerTab> tabs) {
+        return tabs.stream().anyMatch(ServerTab::isAway);
+    }
+
+    private static boolean anyCommander(List<ServerTab> tabs) {
+        return tabs.stream().anyMatch(ServerTab::isCommander);
+    }
+
+    /** @return the 1-based tab number in the argument, or 1 when it is not a number */
+    private static int parseIndex(String argument) {
+        try {
+            return Math.max(1, Integer.parseInt(argument.trim()));
+        } catch (RuntimeException e) {
+            return 1;
+        }
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/HotkeyArguments.java

@@ -0,0 +1,16 @@
+package com.ts3client.ui;
+
+import com.ts3client.hotkey.HotkeyAction;
+
+import java.util.List;
+
+/**
+ * Supplies the concrete values an action's parameter can take — the bookmarks, sound
+ * packs and channels the hotkey tree hangs under an action as its leaves, so a binding
+ * reads as "Sounds / Activate Soundpack / Default Sound Pack (Male)".
+ */
+interface HotkeyArguments {
+
+    /** @return the choices for this action, or an empty list when it is free-form */
+    List<String> choices(HotkeyAction action);
+}

ts3-client/swing/src/main/java/com/ts3client/ui/HotkeyDialog.java

@@ -0,0 +1,385 @@
+package com.ts3client.ui;
+
+import com.ts3client.hotkey.Hotkey;
+import com.ts3client.hotkey.HotkeyAction;
+import com.ts3client.hotkey.HotkeyCombo;
+import com.ts3client.hotkey.HotkeyEngine;
+
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.DefaultListCellRenderer;
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JComboBox;
+import javax.swing.JComponent;
+import javax.swing.JDialog;
+import javax.swing.JLabel;
+import javax.swing.JList;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTextField;
+import javax.swing.JTree;
+import javax.swing.SwingUtilities;
+import javax.swing.tree.DefaultMutableTreeNode;
+import javax.swing.tree.DefaultTreeCellRenderer;
+import javax.swing.tree.DefaultTreeModel;
+import javax.swing.tree.TreePath;
+import javax.swing.tree.TreeSelectionModel;
+import java.awt.BorderLayout;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+import java.awt.Window;
+import java.util.List;
+
+/**
+ * Adds or edits one hotkey, following the official client's dialog: pick the action
+ * from the tree — category, action group, action, and where the action takes one, the
+ * concrete bookmark, sound pack or channel — press the key combination to bind, and
+ * choose the edge it triggers on and whether it applies to the active server only.
+ */
+final class HotkeyDialog extends JDialog {
+
+    /**
+     * A tree node: a category or group heading ({@code action == null}), an action, or
+     * one of the values an action's parameter can take ({@code argument != null}).
+     */
+    private record Node(HotkeyAction action, String argument, String label) {
+
+        static Node heading(String label) {
+            return new Node(null, null, label);
+        }
+
+        static Node of(HotkeyAction action) {
+            return new Node(action, null, action.label());
+        }
+
+        static Node value(HotkeyAction action, String argument) {
+            return new Node(action, argument, argument);
+        }
+
+        boolean isHeading() {
+            return action == null;
+        }
+
+        @Override
+        public String toString() {
+            return label;
+        }
+    }
+
+    private final HotkeyService service;
+    private final Hotkey hotkey;
+
+    private final DefaultMutableTreeNode root = new DefaultMutableTreeNode("Actions");
+    private final DefaultTreeModel treeModel = new DefaultTreeModel(root);
+    private final JTree tree = new JTree(treeModel);
+    private final JCheckBox advancedCheck = new JCheckBox("Show advanced actions");
+    private final JButton keyButton = new JButton();
+    private final JComboBox<Hotkey.Trigger> triggerCombo = new JComboBox<>(Hotkey.Trigger.values());
+    private final JCheckBox activeServerCheck = new JCheckBox("On active server");
+    private final JLabel argumentLabel = new JLabel();
+    private final JTextField argumentField = new JTextField();
+    private final JLabel hint = new JLabel();
+
+    private HotkeyCombo combo;
+    private boolean recording;
+    private boolean confirmed;
+
+    HotkeyDialog(Window owner, HotkeyService service, Hotkey existing) {
+        // Any window may open this: the options dialog's hotkey tab as much as a frame.
+        super(owner, existing == null ? "Add hotkey" : "Edit hotkey", ModalityType.APPLICATION_MODAL);
+        this.service = service;
+        this.hotkey = existing == null ? new Hotkey() : existing.copy();
+        this.combo = hotkey.combo;
+
+        advancedCheck.setSelected(hotkey.action != null && hotkey.action.advanced());
+        advancedCheck.addActionListener(e -> rebuildTree());
+        tree.setRootVisible(false);
+        tree.setShowsRootHandles(true);
+        tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
+        tree.setCellRenderer(new NodeRenderer());
+        tree.addTreeSelectionListener(e -> selectionChanged());
+        rebuildTree();
+
+        keyButton.addActionListener(e -> startRecording());
+        triggerCombo.setRenderer(new DefaultListCellRenderer() {
+            @Override
+            public Component getListCellRendererComponent(JList<?> list, Object value, int index,
+                                                          boolean selected, boolean focused) {
+                super.getListCellRendererComponent(list, value, index, selected, focused);
+                if (value instanceof Hotkey.Trigger t) setText(t.label());
+                return this;
+            }
+        });
+        triggerCombo.setSelectedItem(hotkey.trigger);
+        activeServerCheck.setSelected(hotkey.activeServerOnly);
+        argumentField.setText(hotkey.argument == null ? "" : hotkey.argument);
+        hint.setFont(hint.getFont().deriveFont(Font.ITALIC, hint.getFont().getSize2D() - 1f));
+
+        getContentPane().setLayout(new BorderLayout(8, 8));
+        ((JComponent) getContentPane()).setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
+        getContentPane().add(buildActionPane(), BorderLayout.CENTER);
+        getContentPane().add(buildForm(), BorderLayout.SOUTH);
+
+        updateKeyButton();
+        updateForAction();
+        Dialogs.closeOnEscape(this, this::cancel);
+        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
+        setSize(new Dimension(470, 560));
+        setLocationRelativeTo(owner);
+    }
+
+    private JPanel buildActionPane() {
+        JPanel p = new JPanel(new BorderLayout(0, 4));
+        p.add(new JLabel("Action:"), BorderLayout.NORTH);
+        p.add(new JScrollPane(tree), BorderLayout.CENTER);
+        p.add(advancedCheck, BorderLayout.SOUTH);
+        return p;
+    }
+
+    private JPanel buildForm() {
+        JPanel p = new JPanel(new GridBagLayout());
+        GridBagConstraints c = new GridBagConstraints();
+        c.insets = new Insets(3, 3, 3, 3);
+        c.anchor = GridBagConstraints.WEST;
+        c.fill = GridBagConstraints.HORIZONTAL;
+
+        int row = 0;
+        addRow(p, c, row++, new JLabel("Hotkey:"), keyButton);
+        addRow(p, c, row++, argumentLabel, argumentField);
+        addRow(p, c, row++, new JLabel("Trigger:"), triggerCombo);
+
+        c.gridx = 1;
+        c.gridy = row++;
+        p.add(activeServerCheck, c);
+        c.gridx = 0;
+        c.gridy = row++;
+        c.gridwidth = 2;
+        p.add(hint, c);
+
+        JPanel buttons = new JPanel();
+        JButton ok = new JButton("OK");
+        JButton cancel = new JButton("Cancel");
+        ok.addActionListener(e -> confirm());
+        cancel.addActionListener(e -> cancel());
+        buttons.add(Box.createHorizontalGlue());
+        buttons.add(ok);
+        buttons.add(cancel);
+        c.gridy = row;
+        p.add(buttons, c);
+        getRootPane().setDefaultButton(ok);
+        return p;
+    }
+
+    private static void addRow(JPanel p, GridBagConstraints c, int row, JComponent left, JComponent right) {
+        c.gridwidth = 1;
+        c.gridx = 0;
+        c.gridy = row;
+        c.weightx = 0;
+        p.add(left, c);
+        c.gridx = 1;
+        c.weightx = 1;
+        p.add(right, c);
+    }
+
+    /**
+     * Builds category → group → action → value, collapsing the groups TS3 leaves
+     * unnamed so their actions sit directly under the category.
+     */
+    private void rebuildTree() {
+        boolean advanced = advancedCheck.isSelected();
+        root.removeAllChildren();
+        for (HotkeyAction.Category category : HotkeyAction.Category.values()) {
+            List<HotkeyAction> actions = HotkeyAction.of(category, advanced);
+            if (actions.isEmpty()) continue;
+            DefaultMutableTreeNode categoryNode =
+                    new DefaultMutableTreeNode(Node.heading(category.label()));
+            DefaultMutableTreeNode groupNode = null;
+            String groupName = null;
+            for (HotkeyAction action : actions) {
+                DefaultMutableTreeNode parent = categoryNode;
+                if (!action.group().isEmpty()) {
+                    if (groupNode == null || !action.group().equals(groupName)) {
+                        groupName = action.group();
+                        groupNode = new DefaultMutableTreeNode(Node.heading(groupName));
+                        categoryNode.add(groupNode);
+                    }
+                    parent = groupNode;
+                }
+                DefaultMutableTreeNode actionNode = new DefaultMutableTreeNode(Node.of(action));
+                parent.add(actionNode);
+                for (String value : service.argumentChoices(action)) {
+                    actionNode.add(new DefaultMutableTreeNode(Node.value(action, value)));
+                }
+            }
+            root.add(categoryNode);
+        }
+        treeModel.reload();
+        // Categories open, groups closed: the whole action set at a glance, as in TS3.
+        for (int i = 0; i < root.getChildCount(); i++) {
+            tree.expandPath(new TreePath(((DefaultMutableTreeNode) root.getChildAt(i)).getPath()));
+        }
+        selectCurrent();
+    }
+
+    /** Reveals and selects the node matching the binding being edited. */
+    private void selectCurrent() {
+        if (hotkey.action == null) return;
+        DefaultMutableTreeNode match = null;
+        var nodes = root.depthFirstEnumeration();
+        while (nodes.hasMoreElements()) {
+            DefaultMutableTreeNode node = (DefaultMutableTreeNode) nodes.nextElement();
+            if (!(node.getUserObject() instanceof Node n) || n.action() != hotkey.action) continue;
+            boolean sameArgument = n.argument() != null && n.argument().equals(hotkey.argument);
+            if (sameArgument) {
+                match = node;
+                break;
+            }
+            if (n.argument() == null && match == null) match = node;
+        }
+        if (match == null) return;
+        TreePath path = new TreePath(match.getPath());
+        tree.setSelectionPath(path);
+        SwingUtilities.invokeLater(() -> tree.scrollPathToVisible(path));
+    }
+
+    private void selectionChanged() {
+        if (!(tree.getLastSelectedPathComponent() instanceof DefaultMutableTreeNode node)
+                || !(node.getUserObject() instanceof Node selected)) {
+            return;
+        }
+        if (selected.isHeading()) {
+            // Headings only structure the tree; keep the action that was chosen before.
+            tree.clearSelection();
+            selectCurrent();
+            return;
+        }
+        hotkey.action = selected.action();
+        if (selected.argument() != null) argumentField.setText(selected.argument());
+        updateForAction();
+    }
+
+    /** Syncs the form to the selected action: parameter row, trigger, scope and hint. */
+    private void updateForAction() {
+        HotkeyAction action = hotkey.action;
+        boolean takesArgument = action != null && action.argument() != HotkeyAction.Argument.NONE;
+        argumentLabel.setText(takesArgument ? argumentLabel(action) : "");
+        argumentLabel.setVisible(takesArgument);
+        argumentField.setVisible(takesArgument);
+
+        boolean momentary = action != null && action.momentary();
+        triggerCombo.setEnabled(!momentary);
+        activeServerCheck.setEnabled(action != null && action.category() != HotkeyAction.Category.MISC);
+
+        if (action != null && !action.supported()) {
+            hint.setText("This action is part of TeamSpeak's hotkey set but is not implemented yet.");
+        } else if (momentary) {
+            hint.setText("Held down: the action lasts as long as the hotkey is pressed.");
+        } else {
+            hint.setText(service.isRunning() ? " " : service.status());
+        }
+    }
+
+    private static String argumentLabel(HotkeyAction action) {
+        return switch (action.argument()) {
+            case BOOKMARK -> "Bookmark:";
+            case CHANNEL -> "Channel path:";
+            case PROFILE -> "Profile:";
+            default -> "Parameter:";
+        };
+    }
+
+    private void startRecording() {
+        if (recording) return;
+        if (!service.isRunning()) {
+            hint.setText(service.status());
+            return;
+        }
+        recording = true;
+        keyButton.setText("Press hotkey combination…");
+        service.record(new HotkeyEngine.Recorder() {
+            @Override
+            public void onRecording(HotkeyCombo partial) {
+                SwingUtilities.invokeLater(() -> keyButton.setText(service.display(partial) + "…"));
+            }
+
+            @Override
+            public void onRecorded(HotkeyCombo recorded) {
+                SwingUtilities.invokeLater(() -> {
+                    combo = recorded;
+                    stopRecording();
+                });
+            }
+        });
+    }
+
+    private void stopRecording() {
+        if (!recording) return;
+        recording = false;
+        service.stopRecording();
+        updateKeyButton();
+    }
+
+    private void updateKeyButton() {
+        keyButton.setText(combo == null || combo.isEmpty()
+                ? "No hotkey assigned" : service.display(combo));
+    }
+
+    private void confirm() {
+        stopRecording();
+        if (hotkey.action == null || combo == null || combo.isEmpty()) {
+            hint.setText("Pick an action and press a key combination first.");
+            return;
+        }
+        if (!hotkey.action.supported()) {
+            hint.setText("This action is not implemented yet — pick another one.");
+            return;
+        }
+        hotkey.combo = combo;
+        hotkey.trigger = (Hotkey.Trigger) triggerCombo.getSelectedItem();
+        hotkey.activeServerOnly = activeServerCheck.isSelected();
+        hotkey.argument = argumentField.getText().trim();
+        confirmed = true;
+        dispose();
+    }
+
+    private void cancel() {
+        stopRecording();
+        dispose();
+    }
+
+    boolean isConfirmed() {
+        return confirmed;
+    }
+
+    Hotkey result() {
+        return hotkey;
+    }
+
+    /** Draws headings in bold and greys out the actions this client cannot perform. */
+    private static final class NodeRenderer extends DefaultTreeCellRenderer {
+        @Override
+        public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected,
+                                                      boolean expanded, boolean leaf, int row,
+                                                      boolean focused) {
+            super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, focused);
+            setIcon(null);
+            if (!(value instanceof DefaultMutableTreeNode node)
+                    || !(node.getUserObject() instanceof Node n)) {
+                return this;
+            }
+            if (n.isHeading()) {
+                setFont(getFont().deriveFont(Font.BOLD));
+                setToolTipText(null);
+            } else {
+                setEnabled(n.action().supported());
+                setToolTipText(n.action().supported() ? null : "Not implemented by this client");
+            }
+            return this;
+        }
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/HotkeyService.java

@@ -0,0 +1,94 @@
+package com.ts3client.ui;
+
+import com.ts3client.hotkey.GlobalInputHook;
+import com.ts3client.hotkey.Hotkey;
+import com.ts3client.hotkey.HotkeyAction;
+import com.ts3client.hotkey.HotkeyCombo;
+import com.ts3client.hotkey.HotkeyEngine;
+import com.ts3client.hotkey.HotkeyKey;
+import com.ts3client.hotkey.Hotkeys;
+import com.ts3client.hotkey.desktop.DesktopInputHooks;
+
+import java.util.List;
+
+/**
+ * Owns the hotkey machinery for the UI: the stored bindings, the matching engine and
+ * the platform input hook they are fed from. Everything the dialogs need — recording a
+ * combination, naming keys, telling the user why hotkeys are dead — goes through here.
+ */
+final class HotkeyService {
+
+    private final Hotkeys hotkeys = Hotkeys.load();
+    private final HotkeyEngine engine;
+    private final GlobalInputHook hook;
+    private final HotkeyArguments arguments;
+
+    HotkeyService(HotkeyEngine.Handler handler, HotkeyArguments arguments) {
+        this.arguments = arguments;
+        engine = new HotkeyEngine(hotkeys, handler);
+        hook = DesktopInputHooks.start(engine);
+    }
+
+    /** The values this action's parameter can take right now, for the action tree. */
+    List<String> argumentChoices(HotkeyAction action) {
+        if (arguments == null || action.argument() == HotkeyAction.Argument.NONE) return List.of();
+        try {
+            return arguments.choices(action);
+        } catch (RuntimeException e) {
+            return List.of();
+        }
+    }
+
+    List<Hotkey> all() {
+        return hotkeys.all();
+    }
+
+    void replaceAll(List<Hotkey> updated) {
+        engine.releaseAll();
+        hotkeys.replaceAll(updated);
+        hotkeys.save();
+    }
+
+    /** The binding for an action with no argument, or {@code null} when unbound. */
+    Hotkey find(HotkeyAction action) {
+        synchronized (hotkeys.all()) {
+            for (Hotkey h : hotkeys.all()) {
+                if (h.action == action) return h;
+            }
+        }
+        return null;
+    }
+
+    boolean isRunning() {
+        return hook.isRunning();
+    }
+
+    /** One line for the options dialog: either working, or why it is not. */
+    String status() {
+        return hook.isRunning()
+                ? "Global hotkeys are active."
+                : "Global hotkeys are unavailable (" + hook.unavailableReason() + ").";
+    }
+
+    String display(HotkeyCombo combo) {
+        return combo == null ? "No hotkey assigned" : combo.display(this::keyName);
+    }
+
+    private String keyName(HotkeyKey key) {
+        return hook.keyName(key);
+    }
+
+    /** Captures the next combination instead of firing bindings; see {@link #stopRecording()}. */
+    void record(HotkeyEngine.Recorder recorder) {
+        engine.record(recorder);
+    }
+
+    void stopRecording() {
+        engine.stopRecording();
+    }
+
+    void dispose() {
+        engine.releaseAll();
+        hook.close();
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/HotkeysPanel.java

@@ -0,0 +1,170 @@
+package com.ts3client.ui;
+
+import com.ts3client.hotkey.Hotkey;
+
+import javax.swing.BorderFactory;
+import javax.swing.JButton;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTable;
+import javax.swing.ListSelectionModel;
+import javax.swing.SwingUtilities;
+import javax.swing.table.AbstractTableModel;
+import java.awt.BorderLayout;
+import java.awt.Font;
+import java.awt.Window;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The options dialog's hotkey tab: the list of bindings with the buttons to add, edit
+ * and remove them. Edits happen on a working copy and only reach the running engine
+ * when the dialog is applied.
+ */
+final class HotkeysPanel extends JPanel {
+
+    private static final String[] COLUMNS = {"Action", "Hotkey", "Trigger", "Active server", "On"};
+
+    private final HotkeyService service;
+    private final List<Hotkey> working = new ArrayList<>();
+    private final Model model = new Model();
+    private final JTable table = new JTable(model);
+
+    HotkeysPanel(HotkeyService service) {
+        super(new BorderLayout(6, 6));
+        this.service = service;
+        setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
+
+        synchronized (service.all()) {
+            for (Hotkey h : service.all()) working.add(h.copy());
+        }
+
+        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
+        table.setRowHeight(table.getRowHeight() + 4);
+        table.getColumnModel().getColumn(0).setPreferredWidth(240);
+        table.getColumnModel().getColumn(1).setPreferredWidth(150);
+        table.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mouseClicked(MouseEvent e) {
+                if (e.getClickCount() == 2) edit();
+            }
+        });
+
+        JButton add = new JButton("Add…");
+        JButton edit = new JButton("Edit…");
+        JButton remove = new JButton("Remove");
+        add.addActionListener(e -> add());
+        edit.addActionListener(e -> edit());
+        remove.addActionListener(e -> remove());
+
+        JPanel buttons = new JPanel();
+        buttons.add(add);
+        buttons.add(edit);
+        buttons.add(remove);
+
+        JLabel status = new JLabel(service.status());
+        status.setFont(status.getFont().deriveFont(Font.ITALIC, status.getFont().getSize2D() - 1f));
+
+        add(new JScrollPane(table), BorderLayout.CENTER);
+        JPanel south = new JPanel(new BorderLayout());
+        south.add(buttons, BorderLayout.WEST);
+        south.add(status, BorderLayout.SOUTH);
+        add(south, BorderLayout.SOUTH);
+    }
+
+    private void add() {
+        HotkeyDialog dlg = new HotkeyDialog(owner(), service, null);
+        dlg.setVisible(true);
+        if (!dlg.isConfirmed()) return;
+        working.add(dlg.result());
+        model.fireTableDataChanged();
+    }
+
+    private void edit() {
+        int row = table.getSelectedRow();
+        if (row < 0) return;
+        HotkeyDialog dlg = new HotkeyDialog(owner(), service, working.get(row));
+        dlg.setVisible(true);
+        if (!dlg.isConfirmed()) return;
+        working.set(row, dlg.result());
+        model.fireTableRowsUpdated(row, row);
+    }
+
+    private void remove() {
+        int row = table.getSelectedRow();
+        if (row < 0) return;
+        working.remove(row);
+        model.fireTableDataChanged();
+    }
+
+    private Window owner() {
+        return SwingUtilities.getWindowAncestor(this);
+    }
+
+    /** Commits the edited list to the engine and to disk. */
+    void apply() {
+        service.replaceAll(working);
+    }
+
+    /** Picks the stored bindings up again after something else changed them. */
+    void reload() {
+        working.clear();
+        synchronized (service.all()) {
+            for (Hotkey h : service.all()) working.add(h.copy());
+        }
+        model.fireTableDataChanged();
+    }
+
+    private final class Model extends AbstractTableModel {
+
+        @Override
+        public int getRowCount() {
+            return working.size();
+        }
+
+        @Override
+        public int getColumnCount() {
+            return COLUMNS.length;
+        }
+
+        @Override
+        public String getColumnName(int column) {
+            return COLUMNS[column];
+        }
+
+        @Override
+        public Class<?> getColumnClass(int column) {
+            return column >= 3 ? Boolean.class : String.class;
+        }
+
+        @Override
+        public boolean isCellEditable(int row, int column) {
+            return column == 4 || (column == 3 && working.get(row).isServerScoped());
+        }
+
+        @Override
+        public Object getValueAt(int row, int column) {
+            Hotkey h = working.get(row);
+            return switch (column) {
+                case 0 -> h.path();
+                case 1 -> service.display(h.combo);
+                case 2 -> h.action.momentary() ? "While held" : h.trigger.label();
+                case 3 -> h.isServerScoped() && h.activeServerOnly;
+                default -> h.enabled;
+            };
+        }
+
+        @Override
+        public void setValueAt(Object value, int row, int column) {
+            Hotkey h = working.get(row);
+            if (column == 3) {
+                h.activeServerOnly = Boolean.TRUE.equals(value);
+            } else if (column == 4) {
+                h.enabled = Boolean.TRUE.equals(value);
+            }
+        }
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/HtmlStyles.java

@@ -0,0 +1,108 @@
+package com.ts3client.ui;
+
+import com.ts3client.text.BBCode;
+
+import javax.swing.JEditorPane;
+import javax.swing.JViewport;
+import javax.swing.SwingUtilities;
+import javax.swing.text.html.HTMLEditorKit;
+import javax.swing.text.html.StyleSheet;
+import java.awt.Color;
+
+/**
+ * The HTML panes showing TeamSpeak text — chat logs, client and channel information —
+ * and the theme-dependent stylesheet they share.
+ *
+ * <p>Text that is already on screen keeps the colours its stylesheet was built with, so
+ * a look-and-feel change re-installs the editor kit and parses the pane's content again
+ * instead of only recolouring what is written afterwards.
+ */
+final class HtmlStyles {
+
+    private static final String BODY_STYLE = "HtmlStyles.bodyStyle";
+
+    private HtmlStyles() {
+    }
+
+    /**
+     * @param bodyStyle extra CSS for {@code body}, e.g. font and margins; the text colour
+     *                  is added by the theme
+     * @return a read-only HTML pane whose stylesheet follows the current theme
+     */
+    static JEditorPane pane(String bodyStyle) {
+        JEditorPane pane = new JEditorPane() {
+            @Override
+            public void updateUI() {
+                super.updateUI();
+                restyle(this);
+            }
+        };
+        pane.putClientProperty(BODY_STYLE, bodyStyle);
+        pane.setEditable(false);
+        installKit(pane, null, false);
+        return pane;
+    }
+
+    /**
+     * Paints the scroll pane {@code pane} sits in with the pane's own background: text
+     * only reaches as far as it goes, and the empty space below it would otherwise show
+     * the window's colour instead of the log's.
+     */
+    static void fillViewport(JEditorPane pane) {
+        if (pane.getParent() instanceof JViewport viewport) {
+            viewport.setBackground(pane.getBackground());
+        }
+    }
+
+    /** Re-themes {@code pane}, keeping the text it shows. */
+    private static void restyle(JEditorPane pane) {
+        // Also runs from JEditorPane's constructor, before the pane is one of ours.
+        if (pane.getClientProperty(BODY_STYLE) == null) return;
+
+        int length = pane.getDocument().getLength();
+        String html = length == 0 ? null : pane.getText();
+        // A chat log sits at its newest line; keep it there rather than jumping to the top.
+        boolean atEnd = pane.getCaretPosition() >= length;
+        // Not during the look-and-feel update that got us here: the pane is rebuilding its
+        // views, and replacing the document underneath it would race with that.
+        SwingUtilities.invokeLater(() -> installKit(pane, html, atEnd));
+    }
+
+    private static void installKit(JEditorPane pane, String html, boolean atEnd) {
+        HTMLEditorKit kit = new HTMLEditorKit();
+        StyleSheet css = new StyleSheet();
+        css.addStyleSheet(kit.getStyleSheet());
+
+        Object bodyStyle = pane.getClientProperty(BODY_STYLE);
+        css.addRule("body { " + (bodyStyle == null ? "" : bodyStyle + " ")
+                + "color:" + hex(Theme.chatText()) + "; }");
+        // Secondary text (timestamps, labels, placeholders), an author's name and the lines
+        // about what happened on the server.
+        css.addRule(".muted { color:" + hex(Theme.chatSystem()) + "; }");
+        css.addRule(".name { color:" + hex(Theme.chatName()) + "; font-weight:bold; }");
+        css.addRule(".event { color:" + hex(Theme.chatEvent()) + "; }");
+        css.addRule("a { color:" + hex(Theme.chatName()) + "; text-decoration:none; }");
+        // Client references look exactly like a message author's name.
+        css.addRule("a." + BBCode.IDENTITY_LINK_CLASS
+                + " { color:" + hex(Theme.chatName()) + "; font-weight:bold; text-decoration:none; }");
+        // Channel (and other TeamSpeak protocol) references stand out of a line the same
+        // way a client's name does.
+        css.addRule("a." + BBCode.TS_LINK_CLASS
+                + " { color:" + hex(Theme.chatName()) + "; font-weight:bold; text-decoration:none; }");
+        // External links are underlined so they can't be mistaken for an identity.
+        css.addRule("a." + BBCode.EXTERNAL_LINK_CLASS
+                + " { color:" + hex(Theme.link()) + "; text-decoration:underline; }");
+        kit.setStyleSheet(css);
+
+        pane.setEditorKit(kit);
+        fillViewport(pane);
+        if (html != null) {
+            pane.setText(html);
+            pane.setCaretPosition(atEnd ? pane.getDocument().getLength() : 0);
+        }
+    }
+
+    private static String hex(Color c) {
+        return String.format("#%02x%02x%02x", c.getRed(), c.getGreen(), c.getBlue());
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/IconChooserDialog.java

@@ -0,0 +1,270 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.IconRepository;
+import com.ts3client.net.TeamspeakConnection;
+
+import javax.swing.BorderFactory;
+import javax.swing.DefaultListModel;
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+import javax.swing.JDialog;
+import javax.swing.JFileChooser;
+import javax.swing.JLabel;
+import javax.swing.JList;
+import javax.swing.JOptionPane;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JSplitPane;
+import javax.swing.ListSelectionModel;
+import javax.swing.SwingUtilities;
+import javax.swing.Timer;
+import javax.swing.filechooser.FileNameExtensionFilter;
+import java.awt.BorderLayout;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.Window;
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.io.File;
+
+/**
+ * TeamSpeak's icon viewer: the icons uploaded to this virtual server on one side (which
+ * can be added to and removed from here) and the ones the icon pack ships on the other.
+ *
+ * <p>Server icons arrive through the {@link IconRepository}, which downloads them in the
+ * background, so the lists are simply repainted until every icon has turned up.
+ */
+final class IconChooserDialog extends JDialog {
+
+    /** How often the lists are repainted while icons are still being downloaded. */
+    private static final int REFRESH_MS = 300;
+    /** Give up repainting once nothing has arrived for this long. */
+    private static final int REFRESH_TIMEOUT_MS = 20_000;
+
+    private final TeamspeakConnection conn;
+    private final GroupIcons groupIcons;
+
+    private final DefaultListModel<Long> remoteModel = new DefaultListModel<>();
+    private final JList<Long> remoteList = new JList<>(remoteModel);
+    private final JList<Long> localList = new JList<>(new DefaultListModel<>());
+    private final JButton deleteButton = new JButton("Delete");
+    private final JButton selectButton = new JButton("Select");
+    private final JLabel status = new JLabel(" ");
+
+    private long chosenIconId;
+    private boolean accepted;
+
+    IconChooserDialog(Window owner, TeamspeakConnection conn, GroupIcons groupIcons) {
+        super(owner, "Icons", ModalityType.APPLICATION_MODAL);
+        this.conn = conn;
+        this.groupIcons = groupIcons;
+
+        configure(remoteList);
+        configure(localList);
+        DefaultListModel<Long> localModel = (DefaultListModel<Long>) localList.getModel();
+        for (Long id : IconRepository.BUNDLED_IDS) localModel.addElement(id);
+
+        JSplitPane split = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,
+                group("Remote", remoteList, remoteButtons()),
+                group("Local", localList, localFooter()));
+        split.setResizeWeight(0.6);
+
+        status.setBorder(BorderFactory.createEmptyBorder(2, 8, 2, 8));
+        status.setForeground(Theme.chatSystem());
+
+        getContentPane().setLayout(new BorderLayout());
+        getContentPane().add(split, BorderLayout.CENTER);
+        JPanel south = new JPanel(new BorderLayout());
+        south.add(status, BorderLayout.NORTH);
+        south.add(buttons(), BorderLayout.SOUTH);
+        getContentPane().add(south, BorderLayout.SOUTH);
+
+        Dialogs.closeOnEscape(this);
+        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
+        setSize(new Dimension(520, 360));
+        setLocationRelativeTo(owner);
+
+        loadRemoteIcons();
+        startRefreshing();
+    }
+
+    /** @return whether an icon was picked; {@link #getIconId()} then holds it */
+    boolean isAccepted() {
+        return accepted;
+    }
+
+    long getIconId() {
+        return chosenIconId;
+    }
+
+    private void configure(JList<Long> list) {
+        list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
+        list.setVisibleRowCount(-1);
+        list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
+        list.setFixedCellWidth(32);
+        list.setFixedCellHeight(32);
+        list.setCellRenderer(new IconCellRenderer());
+        list.addListSelectionListener(e -> onSelectionChanged(list));
+        list.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mouseClicked(MouseEvent e) {
+                if (e.getClickCount() == 2 && list.getSelectedValue() != null) choose(list.getSelectedValue());
+            }
+        });
+    }
+
+    /** Keeps one list's selection exclusive: picking on one side clears the other. */
+    private void onSelectionChanged(JList<Long> list) {
+        JList<Long> other = list == remoteList ? localList : remoteList;
+        if (list.getSelectedValue() != null) other.clearSelection();
+        deleteButton.setEnabled(remoteList.getSelectedValue() != null);
+        selectButton.setEnabled(selectedIcon() != 0);
+    }
+
+    private long selectedIcon() {
+        Long remote = remoteList.getSelectedValue();
+        if (remote != null) return remote;
+        Long local = localList.getSelectedValue();
+        return local == null ? 0 : local;
+    }
+
+    private JPanel group(String title, JList<Long> list, Component footer) {
+        JPanel panel = new JPanel(new BorderLayout(0, 4));
+        panel.setBorder(BorderFactory.createTitledBorder(title));
+        panel.add(new JScrollPane(list), BorderLayout.CENTER);
+        panel.add(footer, BorderLayout.SOUTH);
+        return panel;
+    }
+
+    private Component remoteButtons() {
+        JButton upload = new JButton("Upload");
+        upload.addActionListener(a -> uploadIcon());
+        deleteButton.setEnabled(false);
+        deleteButton.addActionListener(a -> deleteSelectedIcon());
+        JPanel row = new JPanel(new java.awt.FlowLayout(java.awt.FlowLayout.LEFT, 4, 0));
+        row.add(upload);
+        row.add(deleteButton);
+        return row;
+    }
+
+    private Component localFooter() {
+        com.ts3client.gfx.IconPack active = IconTheme.get().activePack();
+        JLabel pack = new JLabel("Icon Pack: " + (active == null ? "none" : active.name()));
+        pack.setBorder(BorderFactory.createEmptyBorder(0, 4, 0, 4));
+        return pack;
+    }
+
+    private JPanel buttons() {
+        selectButton.setEnabled(false);
+        selectButton.addActionListener(a -> choose(selectedIcon()));
+        JButton cancel = new JButton("Cancel");
+        cancel.addActionListener(a -> dispose());
+        JPanel panel = new JPanel(new BorderLayout());
+        JPanel right = new JPanel();
+        right.add(selectButton);
+        right.add(cancel);
+        panel.add(right, BorderLayout.EAST);
+        getRootPane().setDefaultButton(selectButton);
+        return panel;
+    }
+
+    private void choose(long iconId) {
+        if (iconId == 0) return;
+        chosenIconId = iconId;
+        accepted = true;
+        dispose();
+    }
+
+    private void loadRemoteIcons() {
+        status.setText("Loading icons…");
+        conn.requestServerIcons((ids, error) -> SwingUtilities.invokeLater(() -> {
+            if (error != null) {
+                status.setText("Could not list the server's icons: " + error);
+                return;
+            }
+            status.setText(" ");
+            remoteModel.clear();
+            for (Long id : ids) remoteModel.addElement(id);
+        }));
+    }
+
+    private void uploadIcon() {
+        JFileChooser chooser = new JFileChooser();
+        chooser.setDialogTitle("Select an image to upload");
+        chooser.setFileFilter(new FileNameExtensionFilter("Images", "png", "jpg", "jpeg", "gif", "bmp", "svg"));
+        if (chooser.showOpenDialog(this) != JFileChooser.APPROVE_OPTION) return;
+        File file = chooser.getSelectedFile();
+        status.setText("Uploading " + file.getName() + "…");
+        conn.uploadIcon(file, (iconId, error) -> SwingUtilities.invokeLater(() -> {
+            if (error != null) {
+                status.setText(" ");
+                JOptionPane.showMessageDialog(this, "Error uploading icon: " + error,
+                        "Error", JOptionPane.ERROR_MESSAGE);
+                return;
+            }
+            loadRemoteIcons();
+            startRefreshing();
+        }));
+    }
+
+    private void deleteSelectedIcon() {
+        Long id = remoteList.getSelectedValue();
+        if (id == null) return;
+        int answer = JOptionPane.showConfirmDialog(this,
+                "Permanently delete this icon from the server?", "Confirmation",
+                JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE);
+        if (answer != JOptionPane.YES_OPTION) return;
+        conn.deleteIcon(id, error -> SwingUtilities.invokeLater(() -> {
+            if (error != null) {
+                JOptionPane.showMessageDialog(this, "Failed to delete remote icon file: " + error,
+                        "Error", JOptionPane.ERROR_MESSAGE);
+                return;
+            }
+            remoteModel.removeElement(id);
+        }));
+    }
+
+    /**
+     * Repaints while the repository is still fetching icons; it hands them over silently,
+     * so the only way to show them as they land is to keep asking.
+     */
+    private void startRefreshing() {
+        Timer timer = new Timer(REFRESH_MS, null);
+        long deadline = System.currentTimeMillis() + REFRESH_TIMEOUT_MS;
+        timer.addActionListener(e -> {
+            remoteList.repaint();
+            localList.repaint();
+            if (!isDisplayable() || System.currentTimeMillis() > deadline || allIconsLoaded()) timer.stop();
+        });
+        timer.start();
+    }
+
+    private boolean allIconsLoaded() {
+        for (int i = 0; i < remoteModel.size(); i++) {
+            if (groupIcons.icon(remoteModel.get(i)) == null) return false;
+        }
+        return true;
+    }
+
+    /** Draws one icon, blank until the repository has it. */
+    private final class IconCellRenderer extends javax.swing.DefaultListCellRenderer {
+        @Override
+        public Component getListCellRendererComponent(JList<?> list, Object value, int index,
+                                                      boolean selected, boolean focused) {
+            super.getListCellRendererComponent(list, "", index, selected, focused);
+            long id = value instanceof Long ? (Long) value : 0;
+            ImageIcon icon = groupIcons.icon(id);
+            setIcon(icon);
+            setHorizontalAlignment(CENTER);
+            setToolTipText("Icon " + id);
+            return this;
+        }
+    }
+
+    /** Convenience for callers that only need the picked id. */
+    static long pick(Window owner, TeamspeakConnection conn, GroupIcons groupIcons, long current) {
+        IconChooserDialog dialog = new IconChooserDialog(owner, conn, groupIcons);
+        dialog.setVisible(true);
+        return dialog.isAccepted() ? dialog.getIconId() : current;
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/Icons.java

@@ -55,7 +55,7 @@ public final class Icons {
 
     private static ImageIcon themed(String key, int size, Painter fallback) {
         ImageIcon icon = IconTheme.icon(key, size);
-        return icon != null ? icon : make(fallback);
+        return icon != null ? icon : make(size, fallback);
     }
 
     /**
@@ -71,10 +71,16 @@ public final class Icons {
     }
 
     private static ImageIcon make(Painter p) {
-        BufferedImage img = new BufferedImage(SZ, SZ, BufferedImage.TYPE_INT_ARGB);
+        return make(SZ, p);
+    }
+
+    /** Runs a painter (which draws in a 16×16 box) scaled to {@code size}. */
+    private static ImageIcon make(int size, Painter p) {
+        BufferedImage img = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);
         Graphics2D g = img.createGraphics();
         g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
         g.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
+        g.scale(size / (double) SZ, size / (double) SZ);
         p.paint(g);
         g.dispose();
         return new ImageIcon(img);
@@ -111,37 +117,94 @@ public final class Icons {
     // ---- client status icons ----
 
     public static ImageIcon clientIdle() {
-        return themed("PLAYER_OFF", g -> paintPerson(g, Theme.IDLE_CLIENT));
+        return clientIdle(SZ);
+    }
+
+    public static ImageIcon clientIdle(int size) {
+        return themed("PLAYER_OFF", size, g -> paintPerson(g, Theme.idleClient()));
     }
 
     public static ImageIcon clientTalking() {
-        return themed("PLAYER_ON", g -> paintPerson(g, Theme.TALKING));
+        return clientTalking(SZ);
+    }
+
+    public static ImageIcon clientTalking(int size) {
+        return themed("PLAYER_ON", size, g -> paintPerson(g, Theme.talking()));
     }
 
     public static ImageIcon clientAway() {
-        return themed("AWAY", g -> paintPerson(g, Theme.AWAY));
+        return clientAway(SZ);
+    }
+
+    public static ImageIcon clientAway(int size) {
+        return themed("AWAY", size, g -> paintPerson(g, Theme.away()));
     }
 
     /** A channel commander that is not talking. */
     public static ImageIcon clientCommander() {
-        return themed("PLAYER_COMMANDER_OFF", g -> paintPerson(g, Theme.IDLE_CLIENT));
+        return clientCommander(SZ);
     }
 
     /** A channel commander that is talking. */
     public static ImageIcon clientCommanderTalking() {
-        return themed("PLAYER_COMMANDER_ON", g -> paintPerson(g, Theme.TALKING));
+        return clientCommanderTalking(SZ);
     }
 
     public static ImageIcon clientQuery() {
-        return themed("SERVER_QUERY", g -> paintPerson(g, Theme.IDLE_CLIENT));
+        return themed("SERVER_QUERY", g -> paintPerson(g, Theme.idleClient()));
     }
 
     public static ImageIcon micMuted() {
-        return themed("INPUT_MUTED", Icons::paintMicMuted);
+        return micMuted(SZ);
+    }
+
+    public static ImageIcon micMuted(int size) {
+        return themed("INPUT_MUTED", size, Icons::paintMicMuted);
     }
 
     public static ImageIcon speakerMuted() {
-        return themed("OUTPUT_MUTED", Icons::paintSpeakerMuted);
+        return speakerMuted(SZ);
+    }
+
+    public static ImageIcon speakerMuted(int size) {
+        return themed("OUTPUT_MUTED", size, Icons::paintSpeakerMuted);
+    }
+
+    /** The capture device is unavailable (another tab holds it), as opposed to muted. */
+    public static ImageIcon micDisabled() {
+        return micDisabled(SZ);
+    }
+
+    public static ImageIcon micDisabled(int size) {
+        return themed("HARDWARE_INPUT_MUTED", size, Icons::paintMicDisabled);
+    }
+
+    /** The playback device is unavailable, as opposed to muted/deafened. */
+    public static ImageIcon speakerDisabled() {
+        return speakerDisabled(SZ);
+    }
+
+    public static ImageIcon speakerDisabled(int size) {
+        return themed("HARDWARE_OUTPUT_MUTED", size, Icons::paintSpeakerDisabled);
+    }
+
+    /** TS3's "Local Mic Mute": silenced, but not reported as muted. */
+    public static ImageIcon micLocalMuted() {
+        return micLocalMuted(SZ);
+    }
+
+    public static ImageIcon micLocalMuted(int size) {
+        return themed("INPUT_MUTED_LOCAL", size, Icons::paintMicLocalMuted);
+    }
+
+    /** A channel commander that is not talking. */
+    public static ImageIcon clientCommander(int size) {
+        return themed("PLAYER_COMMANDER_OFF", size, g -> paintPerson(g, Theme.idleClient()));
+    }
+
+    /** A channel commander that is talking. */
+    public static ImageIcon clientCommanderTalking(int size) {
+        return themed("PLAYER_COMMANDER_ON", size, g -> paintPerson(g, Theme.talking()));
     }
 
     // ---- toolbar / action icons ----
@@ -180,9 +243,34 @@ public final class Icons {
         return themed("ACTIVATE_MICROPHONE", Icons::paintMicActive);
     }
 
+    /**
+     * A fixed-width "channel icon / edit icon" label icon, used where a tab must not
+     * change width as the object it shows changes (e.g. the info-panel-in-chat tab).
+     */
+    public static ImageIcon channelClientPair() {
+        ImageIcon channel = channel(true);
+        ImageIcon edit = themed("EDIT", Icons::paintEdit);
+        int gap = 8;
+        int width = channel.getIconWidth() + gap + edit.getIconWidth();
+        int height = Math.max(channel.getIconHeight(), edit.getIconHeight());
+        BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
+        Graphics2D g = img.createGraphics();
+        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+        g.drawImage(channel.getImage(), 0, (height - channel.getIconHeight()) / 2, null);
+        g.setColor(Theme.idleClient());
+        g.setFont(Theme.uiFont());
+        java.awt.FontMetrics fm = g.getFontMetrics();
+        int slashX = channel.getIconWidth() + (gap - fm.stringWidth("/")) / 2;
+        g.drawString("/", slashX, (height + fm.getAscent()) / 2 - 1);
+        g.drawImage(edit.getImage(), channel.getIconWidth() + gap,
+                (height - edit.getIconHeight()) / 2, null);
+        g.dispose();
+        return new ImageIcon(img);
+    }
+
     /** The toolbar's away marker. */
     public static ImageIcon away() {
-        return themed("AWAY", IconTheme.TOOLBAR_SIZE, g -> paintPerson(g, Theme.AWAY));
+        return themed("AWAY", IconTheme.TOOLBAR_SIZE, g -> paintPerson(g, Theme.away()));
     }
 
     public static ImageIcon settings() {
@@ -190,7 +278,11 @@ public final class Icons {
     }
 
     public static ImageIcon app() {
-        return make(Icons::paintApp);
+        return app(SZ);
+    }
+
+    public static ImageIcon app(int size) {
+        return make(size, Icons::paintApp);
     }
 
     // ---- built-in painters ----
@@ -237,7 +329,7 @@ public final class Icons {
     }
 
     private static void paintMicMuted(Graphics2D g) {
-        g.setColor(Theme.MUTED);
+        g.setColor(Theme.muted());
         g.fillRoundRect(6, 2, 4, 7, 2, 2);
         g.setStroke(new BasicStroke(1.4f));
         g.drawArc(4, 6, 8, 6, 200, 140);
@@ -247,7 +339,7 @@ public final class Icons {
     }
 
     private static void paintSpeakerMuted(Graphics2D g) {
-        g.setColor(Theme.MUTED);
+        g.setColor(Theme.muted());
         g.fillRect(2, 6, 3, 4);
         int[] xs = {5, 9, 9, 5};
         int[] ys = {6, 3, 13, 10};
@@ -256,6 +348,35 @@ public final class Icons {
         g.drawLine(2, 2, 14, 14);
     }
 
+    /** Same shape as {@link #paintMicMuted}, but grey: unavailable, not muted by choice. */
+    private static void paintMicDisabled(Graphics2D g) {
+        g.setColor(Theme.idleClient());
+        g.fillRoundRect(6, 2, 4, 7, 2, 2);
+        g.setStroke(new BasicStroke(1.4f));
+        g.drawArc(4, 6, 8, 6, 200, 140);
+        g.drawLine(8, 12, 8, 14);
+        g.setStroke(new BasicStroke(2f));
+        g.drawLine(2, 2, 14, 14);
+    }
+
+    /** Same shape as {@link #paintSpeakerMuted}, but grey: unavailable, not muted by choice. */
+    private static void paintSpeakerDisabled(Graphics2D g) {
+        g.setColor(Theme.idleClient());
+        g.fillRect(2, 6, 3, 4);
+        int[] xs = {5, 9, 9, 5};
+        int[] ys = {6, 3, 13, 10};
+        g.fillPolygon(xs, ys, 4);
+        g.setStroke(new BasicStroke(2f));
+        g.drawLine(2, 2, 14, 14);
+    }
+
+    /** {@link #paintMicMuted}, marked with a small dot: silenced, but not reported as muted. */
+    private static void paintMicLocalMuted(Graphics2D g) {
+        paintMicMuted(g);
+        g.setColor(Theme.accent());
+        g.fillOval(11, 10, 4, 4);
+    }
+
     private static void paintConnect(Graphics2D g) {
         g.setColor(new Color(0x2E8B57));
         g.setStroke(new BasicStroke(2f));
@@ -266,7 +387,7 @@ public final class Icons {
     }
 
     private static void paintDisconnect(Graphics2D g) {
-        g.setColor(Theme.MUTED);
+        g.setColor(Theme.muted());
         g.setStroke(new BasicStroke(2f));
         g.drawLine(3, 8, 8, 8);
         g.fillRoundRect(8, 5, 5, 6, 2, 2);
@@ -293,7 +414,7 @@ public final class Icons {
     }
 
     private static void paintMicActive(Graphics2D g) {
-        g.setColor(Theme.TALKING);
+        g.setColor(Theme.talking());
         g.fillOval(1, 1, 14, 14);
         g.setColor(Color.WHITE);
         g.fillRoundRect(6, 3, 4, 6, 2, 2);
@@ -302,6 +423,18 @@ public final class Icons {
         g.drawLine(8, 11, 8, 13);
     }
 
+    /** A pencil glyph, drawn when no icon pack ships an "EDIT" icon. */
+    private static void paintEdit(Graphics2D g) {
+        g.setColor(new Color(0x37474F));
+        g.setStroke(new BasicStroke(1.4f));
+        g.drawLine(3, 13, 11, 5);
+        g.drawLine(3, 13, 4, 10);
+        g.drawLine(4, 10, 11, 3);
+        g.drawLine(11, 3, 13, 5);
+        g.drawLine(13, 5, 11, 7);
+        g.drawLine(11, 5, 13, 7);
+    }
+
     private static void paintSettings(Graphics2D g) {
         g.setColor(new Color(0x37474F));
         g.setStroke(new BasicStroke(2f));
@@ -317,7 +450,7 @@ public final class Icons {
     }
 
     private static void paintApp(Graphics2D g) {
-        g.setColor(Theme.ACCENT);
+        g.setColor(Theme.accent());
         g.fillRoundRect(1, 1, 14, 14, 4, 4);
         g.setColor(Color.WHITE);
         g.setStroke(new BasicStroke(1.6f));

ts3-client/swing/src/main/java/com/ts3client/ui/InfoPanel.java

@@ -20,39 +20,100 @@ import java.util.List;
  */
 public final class InfoPanel extends JScrollPane {
 
-    private final JEditorPane pane = new JEditorPane();
+    /** Moves the whole info panel's content out to a persistent chat tab. */
+    public interface DescriptionHandler {
+        /** Shows/updates {@code html} in the info chat tab, creating it if needed. */
+        void showInfoTab(String html, Runnable onClose);
+
+        /** Closes the info chat tab (the user chose to show details in the panel again). */
+        void closeInfoTab();
+
+        /** Hides (or restores) the panel itself, freeing its space, while its content lives in the chat tab. */
+        void setPanelHidden(boolean hidden);
+    }
+
+    private static final String TOGGLE_HREF = "app:toggle-info-tab";
+
+    private final JEditorPane pane = HtmlStyles.pane("font-family:sans-serif; font-size:11px;");
+    private DescriptionHandler descriptionHandler;
+    private ChannelNode shownChannel;
+    private ClientEntry shownClient;
+    private ServerModel shownModel;
+    private IconRepository shownIcons;
+    private boolean inChatTab;
 
     public InfoPanel() {
-        javax.swing.text.html.HTMLEditorKit kit = new javax.swing.text.html.HTMLEditorKit();
-        javax.swing.text.html.StyleSheet css = new javax.swing.text.html.StyleSheet();
-        css.addStyleSheet(kit.getStyleSheet());
-        css.addRule("a { color:" + hex(Theme.CHAT_NAME) + "; text-decoration:none; }");
-        // Client references look exactly like a message author's name.
-        css.addRule("a." + BBCode.IDENTITY_LINK_CLASS
-                + " { color:" + hex(Theme.CHAT_NAME) + "; font-weight:bold; text-decoration:none; }");
-        // External links are underlined so they can't be mistaken for an identity.
-        css.addRule("a." + BBCode.EXTERNAL_LINK_CLASS
-                + " { color:" + hex(Theme.LINK) + "; text-decoration:underline; }");
-        kit.setStyleSheet(css);
-        pane.setEditorKit(kit);
-        pane.setEditable(false);
-        pane.setBackground(Theme.CHAT_BG);
         pane.setBorder(BorderFactory.createEmptyBorder(6, 8, 6, 8));
         pane.addHyperlinkListener(e -> {
-            if (e.getEventType() == javax.swing.event.HyperlinkEvent.EventType.ACTIVATED) {
+            if (e.getEventType() != javax.swing.event.HyperlinkEvent.EventType.ACTIVATED) return;
+            if (TOGGLE_HREF.equals(e.getDescription())) {
+                inChatTab = !inChatTab;
+                if (!inChatTab && descriptionHandler != null) descriptionHandler.closeInfoTab();
+                render();
+            } else {
                 Links.open(e.getDescription(), this);
             }
         });
         setViewportView(pane);
-        setBorder(BorderFactory.createLineBorder(new java.awt.Color(0xD0D0D0)));
+        HtmlStyles.fillViewport(pane);
         clear();
     }
 
+    @Override
+    public void updateUI() {
+        super.updateUI();
+        setBorder(BorderFactory.createLineBorder(Theme.border()));
+    }
+
     public void clear() {
-        setHtml("<i style='color:#8a8a8a'>Select a channel or client to see details.</i>");
+        shownChannel = null;
+        shownClient = null;
+        inChatTab = false;
+        render();
+    }
+
+    public void setDescriptionHandler(DescriptionHandler handler) {
+        this.descriptionHandler = handler;
+    }
+
+    /** Runs when the user closes the info chat tab; shows details in the panel again. */
+    private void onInfoTabClosed() {
+        inChatTab = false;
+        render();
     }
 
     public void showChannel(ChannelNode ch) {
+        shownChannel = ch;
+        shownClient = null;
+        render();
+    }
+
+    public void showClient(ClientEntry cl, ServerModel model, IconRepository icons) {
+        shownClient = cl;
+        shownChannel = null;
+        shownModel = model;
+        shownIcons = icons;
+        render();
+    }
+
+    private void render() {
+        boolean selected = shownChannel != null || shownClient != null;
+        boolean hide = inChatTab && selected;
+        if (descriptionHandler != null) descriptionHandler.setPanelHidden(hide);
+        if (hide) {
+            descriptionHandler.showInfoTab(body(), this::onInfoTabClosed);
+        } else {
+            setHtml(body() + (selected ? toggleLink(true) : ""));
+        }
+    }
+
+    private String body() {
+        if (shownChannel != null) return channelBody(shownChannel);
+        if (shownClient != null) return clientBody(shownClient, shownModel, shownIcons);
+        return "<i class='muted'>Select a channel or client to see details.</i>";
+    }
+
+    private static String channelBody(ChannelNode ch) {
         StringBuilder sb = new StringBuilder();
         sb.append(heading(esc(ch.name)));
         row(sb, "Type", ch.permanent ? "Permanent" : "Temporary");
@@ -63,16 +124,16 @@ public final class InfoPanel extends JScrollPane {
         if (ch.description != null && !ch.description.isEmpty()) {
             sb.append("<div>").append(multiline(ch.description)).append("</div>");
         } else if (ch.descriptionLoaded) {
-            sb.append("<i style='color:#8a8a8a'>No description.</i>");
+            sb.append("<i class='muted'>No description.</i>");
         } else {
-            sb.append("<i style='color:#8a8a8a'>Loading description…</i>");
+            sb.append("<i class='muted'>Loading description…</i>");
         }
-        setHtml(sb.toString());
+        return sb.toString();
     }
 
-    public void showClient(ClientEntry cl, ServerModel model, IconRepository icons) {
+    private static String clientBody(ClientEntry cl, ServerModel model, IconRepository icons) {
         StringBuilder sb = new StringBuilder();
-        sb.append(heading(esc(cl.nickname) + (cl.self ? " <span style='color:#8a8a8a'>(you)</span>" : "")));
+        sb.append(heading(esc(cl.nickname) + (cl.self ? " <span class='muted'>(you)</span>" : "")));
 
         List<Group> serverGroups = model.serverGroupsOf(cl.serverGroupIds);
         if (serverGroups.isEmpty()) {
@@ -96,19 +157,26 @@ public final class InfoPanel extends JScrollPane {
         if (!cl.platform.isEmpty()) row(sb, "Platform", esc(cl.platform));
         if (!cl.version.isEmpty()) row(sb, "Version", esc(cl.version));
         if (cl.away) row(sb, "Status", "Away");
-        if (cl.inputMuted) row(sb, "Microphone", "muted");
-        if (cl.outputMuted) row(sb, "Speakers", "muted");
+        if (!cl.inputHardware) row(sb, "Microphone", "disabled");
+        else if (cl.inputMuted) row(sb, "Microphone", "muted");
+        if (!cl.outputHardware) row(sb, "Speakers", "disabled");
+        else if (cl.outputMuted) row(sb, "Speakers", "muted");
         if (!cl.uniqueId.isEmpty()) row(sb, "Unique ID", esc(cl.uniqueId));
 
         if (cl.description != null && !cl.description.isEmpty()) {
             sb.append("<hr><div>").append(multiline(cl.description)).append("</div>");
         }
-        setHtml(sb.toString());
+        return sb.toString();
+    }
+
+    /** The link that toggles between showing details here and in a chat tab. */
+    private static String toggleLink(boolean toChat) {
+        return "<div style='margin-top:8px'><a href='" + TOGGLE_HREF + "' style='font-size:10px'>"
+                + (toChat ? "Show in chat tab" : "Show here") + "</a></div>";
     }
 
     private void setHtml(String body) {
-        pane.setText("<html><body style='font-family:sans-serif;font-size:11px;color:#202020'>"
-                + body + "</body></html>");
+        pane.setText("<html><body>" + body + "</body></html>");
         pane.setCaretPosition(0);
     }
 
@@ -129,7 +197,7 @@ public final class InfoPanel extends JScrollPane {
     }
 
     private static void row(StringBuilder sb, String label, String value) {
-        sb.append("<div style='margin:1px 0'><span style='color:#5a6b7b'>")
+        sb.append("<div style='margin:1px 0'><span class='muted'>")
                 .append(label).append(":</span> ").append(value).append("</div>");
     }
 
@@ -142,7 +210,4 @@ public final class InfoPanel extends JScrollPane {
         return BBCode.escape(s);
     }
 
-    private static String hex(java.awt.Color c) {
-        return String.format("#%06X", c.getRGB() & 0xFFFFFF);
-    }
 }

ts3-client/swing/src/main/java/com/ts3client/ui/LevelMeter.java

@@ -8,21 +8,28 @@ import java.awt.Graphics2D;
 import java.awt.RenderingHints;
 
 /**
- * Horizontal audio level meter (dBFS) with an optional VAD threshold marker.
- * The filled portion turns green once the level crosses the threshold, giving
- * immediate visual feedback while tuning voice activation.
+ * Horizontal audio level meter with an optional VAD threshold marker. The filled portion
+ * turns green once the level crosses the threshold, giving immediate visual feedback while
+ * tuning voice activation.
+ *
+ * <p>Scaled to {@link com.ts3client.audio.InputLevel}, matching the TS3 client's slider.
  */
 public final class LevelMeter extends JComponent {
 
-    private static final double MIN_DB = -70.0;
-    private static final double MAX_DB = 0.0;
+    private static final double MIN_DB = com.ts3client.audio.InputLevel.MIN_DB;
+    private static final double MAX_DB = com.ts3client.audio.InputLevel.MAX_DB;
 
     private volatile double levelDb = MIN_DB;
-    private volatile double thresholdDb = -45.0;
+    private volatile double thresholdDb = -40.0;
     private volatile boolean showThreshold = true;
+    private volatile boolean transmitting;
 
     public LevelMeter() {
         setPreferredSize(new Dimension(240, 18));
+        // A bare JComponent reports no minimum of its own, so a layout tight on space
+        // collapses the bar to nothing. Keep the height and let only the width give.
+        setMinimumSize(new Dimension(60, 18));
+        setMaximumSize(new Dimension(Integer.MAX_VALUE, 18));
     }
 
     public void setLevel(double db) {
@@ -40,6 +47,16 @@ public final class LevelMeter extends JComponent {
         repaint();
     }
 
+    /**
+     * Whether the gate is currently open. This is the real transmit decision, which in the
+     * Automatic and Hybrid modes depends on the speech detector and the hangover as well as
+     * on the level, so the bar cannot infer it from the threshold alone.
+     */
+    public void setTransmitting(boolean transmitting) {
+        this.transmitting = transmitting;
+        repaint();
+    }
+
     private int dbToX(double db, int w) {
         double clamped = Math.max(MIN_DB, Math.min(MAX_DB, db));
         return (int) ((clamped - MIN_DB) / (MAX_DB - MIN_DB) * w);
@@ -56,8 +73,7 @@ public final class LevelMeter extends JComponent {
         g.fillRoundRect(0, 0, w - 1, h - 1, 6, 6);
 
         int level = dbToX(levelDb, w - 2);
-        boolean over = levelDb >= thresholdDb;
-        g.setColor(over ? Theme.TALKING : new Color(0x5A9BD4));
+        g.setColor(transmitting ? Theme.talking() : new Color(0x5A9BD4));
         g.fillRoundRect(1, 1, Math.max(0, level), h - 3, 5, 5);
 
         if (showThreshold) {

ts3-client/swing/src/main/java/com/ts3client/ui/LookAndFeelManager.java

@@ -0,0 +1,51 @@
+package com.ts3client.ui;
+
+import com.formdev.flatlaf.FlatDarkLaf;
+import com.formdev.flatlaf.FlatLaf;
+import com.formdev.flatlaf.FlatLightLaf;
+import com.ts3client.config.Settings;
+
+import java.awt.Window;
+
+/**
+ * Installs FlatLaf in the requested variant and keeps {@link Theme} in step with it.
+ *
+ * <p>The client's own look-and-feel defaults — rounded controls, and the darker palette
+ * the dark theme is built on — live beside this class as FlatLaf properties files, which
+ * FlatLaf loads on top of the theme's own.
+ */
+public final class LookAndFeelManager {
+
+    /** Where our own FlatLaf properties files sit. */
+    private static final String DEFAULTS_PACKAGE = "com.ts3client.ui.laf";
+
+    static {
+        // Registered once: FlatLaf keeps every registration, and install() runs again on
+        // each theme switch.
+        FlatLaf.registerCustomDefaultsSource(DEFAULTS_PACKAGE);
+    }
+
+    private LookAndFeelManager() {
+    }
+
+    /** Installs the look-and-feel for {@code appearance}. Call before building any window. */
+    public static void install(Settings.Appearance appearance) {
+        FlatLaf laf = appearance == Settings.Appearance.DARK ? new FlatDarkLaf() : new FlatLightLaf();
+        // Whatever look-and-feel stays installed on failure, Theme falls back to its own palette.
+        FlatLaf.setup(laf);
+        Theme.refresh();
+    }
+
+    /**
+     * Switches the look-and-feel of the running client. Components that read {@link Theme}
+     * while painting follow immediately; the ones that copied a colour when they were built
+     * are refreshed by the look-and-feel update.
+     */
+    public static void switchTo(Settings.Appearance appearance) {
+        install(appearance);
+        FlatLaf.updateUI();
+        for (Window w : Window.getWindows()) {
+            w.repaint();
+        }
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/MainFrame.java

@@ -7,33 +7,24 @@ import com.ts3client.config.Bookmark;
 import com.ts3client.config.Bookmarks;
 import com.ts3client.config.IdentityStore;
 import com.ts3client.config.Settings;
+import com.ts3client.net.ChannelNode;
 import com.ts3client.sound.SoundNotifier;
 import com.ts3client.sound.SoundPlayer;
 
 import javax.swing.BorderFactory;
-import javax.swing.Box;
-import javax.swing.JButton;
 import javax.swing.JCheckBox;
 import javax.swing.JCheckBoxMenuItem;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
-import javax.swing.JMenu;
-import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JPopupMenu;
 import javax.swing.JTextField;
-import javax.swing.JToggleButton;
-import javax.swing.JToolBar;
-import javax.swing.KeyStroke;
 import javax.swing.SwingUtilities;
 import java.awt.BorderLayout;
 import java.awt.Dimension;
 import java.awt.GridLayout;
-import java.awt.KeyEventDispatcher;
-import java.awt.KeyboardFocusManager;
-import java.awt.event.KeyEvent;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.util.ArrayList;
@@ -67,25 +58,20 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
     /** The tab that owns the capture device; null when nobody is capturing. */
     private ServerTab micTab;
 
-    private JMenu bookmarksMenu;
-    private JCheckBoxMenuItem awayItem;
-    private JMenuItem awayStatusItem;
-    private JCheckBoxMenuItem commanderItem;
+    private MainMenuBar menuBar;
     private javax.swing.Timer statusTimer;
 
-    private final JLabel statusLabel = new JLabel("Not connected");
-    private final JLabel codecLabel = new JLabel();
+    /** Mirrors the active server's own client state next to the clock. */
+    private TrayController tray;
 
-    private JToolBar toolbar;
-    private JButton connectButton;
-    private JButton disconnectButton;
-    private JToggleButton activeButton;
-    private JToggleButton micButton;
-    private JToggleButton speakerButton;
-    private DropDownToggleButton awayButton;
+    private MainToolbar toolbar;
+    private StatusBar statusBar;
 
     private boolean pttPressed;
 
+    /** Global hotkeys: the bindings, the matching engine and the platform input hook. */
+    private final HotkeyService hotkeys;
+
     /** Guards {@link #shutdown()} so the window listener and JVM hook don't both run it. */
     private final AtomicBoolean shuttingDown = new AtomicBoolean(false);
     private final Thread shutdownHook = new Thread(this::shutdown, "ts3j-shutdown");
@@ -97,6 +83,7 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         this.sounds = new SoundNotifier(settings);
         this.soundPlayer = audio.createSoundPlayer(settings);
         this.sounds.setPlayer(soundPlayer);
+        this.hotkeys = new HotkeyService(new HotkeyActions(this), this::hotkeyArgumentChoices);
 
         setIconImage(Icons.app().getImage());
         // We tear the connections down ourselves on close, so don't let Swing kill the JVM.
@@ -104,31 +91,33 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         addWindowListener(new WindowAdapter() {
             @Override
             public void windowClosing(WindowEvent e) {
-                shutdown();
-                System.exit(0);
+                quit();
             }
         });
         // Catches Ctrl+C / SIGTERM so we still leave the servers cleanly.
         Runtime.getRuntime().addShutdownHook(shutdownHook);
         setMinimumSize(new Dimension(720, 480));
 
-        setJMenuBar(buildMenuBar());
+        tray = new TrayController(this, this::quit);
+        menuBar = buildMenuBar();
+        setJMenuBar(menuBar);
 
         toolbar = buildToolbar();
         add(toolbar, BorderLayout.NORTH);
         // Switching the icon pack in the options dialog re-decorates the whole window.
         IconTheme.get().addListener(() -> SwingUtilities.invokeLater(this::rebuildIcons));
         add(tabPane, BorderLayout.CENTER);
-        add(buildStatusBar(), BorderLayout.SOUTH);
+        statusBar = new StatusBar();
+        statusBar.setVisible(settings.showStatusBar);
+        add(statusBar, BorderLayout.SOUTH);
 
-        codecLabel.setText(audio.description());
+        statusBar.setCodec(audio.description());
 
         ServerTab first = newTab();
         selectTab(first);
         first.chat().appendSystem("Welcome to the TS3J Swing client.");
         first.chat().appendSystem("Use Connections → Connect to join a server.");
 
-        installPushToTalk();
         statusTimer = new javax.swing.Timer(3000, e -> updateConnectionStatus());
         statusTimer.start();
         setSize(880, 560);
@@ -145,184 +134,166 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
 
     // ---- UI construction ----
 
-    private JMenuBar buildMenuBar() {
-        JMenuBar bar = new JMenuBar();
+    private MainMenuBar buildMenuBar() {
+        return new MainMenuBar(bookmarks, new MainMenuBar.Listener() {
+            @Override
+            public void onConnect() {
+                showConnectDialog();
+            }
 
-        JMenu connections = new JMenu("Connections");
-        JMenuItem connect = new JMenuItem("Connect…", Icons.of("CONNECT"));
-        connect.setAccelerator(KeyStroke.getKeyStroke("control S"));
-        connect.addActionListener(e -> showConnectDialog());
-        JMenuItem disconnect = new JMenuItem("Disconnect", Icons.of("DISCONNECT"));
-        disconnect.addActionListener(e -> doDisconnect());
-        JMenuItem closeTab = new JMenuItem("Close tab", Icons.of("CLOSE_BUTTON"));
-        closeTab.setAccelerator(KeyStroke.getKeyStroke("control W"));
-        closeTab.addActionListener(e -> closeTab(selected));
-        JMenuItem quit = new JMenuItem("Quit", Icons.of("QUIT"));
-        quit.addActionListener(e -> {
-            shutdown();
-            System.exit(0);
+            @Override
+            public void onDisconnect() {
+                doDisconnect();
+            }
+
+            @Override
+            public void onCloseTab() {
+                closeTab(selected);
+            }
+
+            @Override
+            public void onQuit() {
+                quit();
+            }
+
+            @Override
+            public void onToggleMic() {
+                toolbar.clickMic();
+            }
+
+            @Override
+            public void onToggleSpeaker() {
+                toolbar.clickSpeaker();
+            }
+
+            @Override
+            public void onAwayToggle(boolean away) {
+                toggleAway(away);
+            }
+
+            @Override
+            public void onAwayStatus() {
+                setAwayStatus();
+            }
+
+            @Override
+            public void onCommanderToggle(boolean commander) {
+                if (selected != null) selected.setCommander(commander);
+            }
+
+            @Override
+            public void onChangeNickname() {
+                changeNickname();
+            }
+
+            @Override
+            public void onShowIdentities() {
+                showIdentities();
+            }
+
+            @Override
+            public void onShowSettings() {
+                showSettings();
+            }
+
+            @Override
+            public void onShowAbout() {
+                showAbout();
+            }
+
+            @Override
+            public void onConnectBookmark(Bookmark bookmark) {
+                connectToBookmark(bookmark);
+            }
+
+            @Override
+            public void onAddCurrentServerBookmark() {
+                addCurrentServerBookmark();
+            }
+
+            @Override
+            public void onManageBookmarks() {
+                new BookmarksDialog(MainFrame.this, bookmarks, identities,
+                        MainFrame.this::connectToBookmark, menuBar::rebuildBookmarks).setVisible(true);
+            }
         });
-        connections.add(connect);
-        connections.add(disconnect);
-        connections.add(closeTab);
-        connections.addSeparator();
-        connections.add(quit);
-
-        bookmarksMenu = new JMenu("Bookmarks");
-        rebuildBookmarksMenu();
-
-        JMenu self = new JMenu("Self");
-        JMenuItem mute = new JMenuItem("Toggle microphone", Icons.of("CAPTURE"));
-        mute.addActionListener(e -> micButton.doClick());
-        JMenuItem deaf = new JMenuItem("Toggle speakers", Icons.of("PLAYBACK"));
-        deaf.addActionListener(e -> speakerButton.doClick());
-        awayItem = new JCheckBoxMenuItem("Away", Icons.of("AWAY"), false);
-        awayItem.addActionListener(e -> toggleAway());
-        awayStatusItem = new JMenuItem("Set away status…", Icons.of("EDIT"));
-        awayStatusItem.addActionListener(e -> setAwayStatus());
-        commanderItem = new JCheckBoxMenuItem("Channel commander", Icons.of("CHANNEL_COMMANDER"), false);
-        commanderItem.addActionListener(e -> {
-            if (selected != null) selected.setCommander(commanderItem.isSelected());
-        });
-        JMenuItem nick = new JMenuItem("Change nickname…", Icons.of("CHANGE_NICKNAME"));
-        nick.addActionListener(e -> changeNickname());
-        self.add(mute);
-        self.add(deaf);
-        self.addSeparator();
-        self.add(awayItem);
-        self.add(awayStatusItem);
-        self.add(commanderItem);
-        self.addSeparator();
-        self.add(nick);
-
-        JMenu tools = new JMenu("Tools");
-        JMenuItem identitiesItem = new JMenuItem("Identities…", Icons.of("IDENTITY_MANAGER"));
-        identitiesItem.addActionListener(e -> showIdentities());
-        JMenuItem options = new JMenuItem("Options…", Icons.of("SETTINGS"));
-        options.addActionListener(e -> showSettings());
-        tools.add(identitiesItem);
-        tools.addSeparator();
-        tools.add(options);
-
-        JMenu help = new JMenu("Help");
-        JMenuItem about = new JMenuItem("About", Icons.of("ABOUT"));
-        about.addActionListener(e -> showAbout());
-        help.add(about);
-
-        bar.add(connections);
-        bar.add(bookmarksMenu);
-        bar.add(self);
-        bar.add(tools);
-        bar.add(help);
-        return bar;
     }
 
-    private void rebuildBookmarksMenu() {
-        bookmarksMenu.removeAll();
-        for (Bookmark b : bookmarks.all()) {
-            JMenuItem item = new JMenuItem(b.displayName(), Icons.of("SERVER_GREEN"));
-            item.addActionListener(e -> connectToBookmark(b));
-            bookmarksMenu.add(item);
-        }
-        if (!bookmarks.all().isEmpty()) bookmarksMenu.addSeparator();
-        JMenuItem addCurrent = new JMenuItem("Add current server…", Icons.of("BOOKMARK_ADD"));
-        addCurrent.addActionListener(e -> addCurrentServerBookmark());
-        JMenuItem manage = new JMenuItem("Manage bookmarks…", Icons.of("BOOKMARK_MANAGER"));
-        manage.addActionListener(e -> new BookmarksDialog(this, bookmarks, identities,
-                this::connectToBookmark, this::rebuildBookmarksMenu).setVisible(true));
-        bookmarksMenu.add(addCurrent);
-        bookmarksMenu.add(manage);
-    }
+    private MainToolbar buildToolbar() {
+        return new MainToolbar(settings, new MainToolbar.Listener() {
+            @Override
+            public void onConnect() {
+                showConnectDialog();
+            }
 
-    private JToolBar buildToolbar() {
-        JToolBar tb = new JToolBar();
-        tb.setFloatable(false);
-        tb.setBackground(Theme.TOOLBAR_BG);
-        tb.setBorder(BorderFactory.createEmptyBorder(4, 6, 4, 6));
+            @Override
+            public void onDisconnect() {
+                doDisconnect();
+            }
 
-        connectButton = new JButton(Icons.connect());
-        connectButton.setToolTipText("Connect to a server");
-        connectButton.addActionListener(e -> showConnectDialog());
+            @Override
+            public void onActivate() {
+                moveMicrophoneToSelectedTab();
+            }
 
-        disconnectButton = new JButton(Icons.disconnect());
-        disconnectButton.setToolTipText("Disconnect");
-        disconnectButton.addActionListener(e -> doDisconnect());
+            @Override
+            public void onMicMuteToggle(boolean muted) {
+                if (selected == null) return;
+                selected.setMicMuted(muted);
+                updateToolbar();
+            }
 
-        activeButton = new JToggleButton(Icons.micActive());
-        activeButton.setToolTipText("Speak on this server (moves the microphone to this tab)");
-        activeButton.addActionListener(e -> {
-            if (selected != null && selected.isConnected()) setMicTab(selected);
-            updateToolbar();
+            @Override
+            public void onDeafenToggle(boolean deafened) {
+                if (selected == null) return;
+                selected.setDeafened(deafened);
+                updateToolbar();
+            }
+
+            @Override
+            public void onAwayToggle(boolean away) {
+                toggleAway(away);
+            }
+
+            @Override
+            public JPopupMenu buildAwayMenu() {
+                return MainFrame.this.buildAwayMenu();
+            }
+
+            @Override
+            public void onSettings() {
+                showSettings();
+            }
+
+            @Override
+            public void onMasterVolumeChanged() {
+                applyOutputSettingsToAllTabs();
+            }
+
+            @Override
+            public void onStatusBarVisibilityChanged(boolean visible) {
+                statusBar.setVisible(visible);
+                revalidate();
+                repaint();
+            }
         });
-
-        micButton = new JToggleButton(Icons.mic());
-        micButton.setToolTipText("Mute / unmute microphone on this server");
-        micButton.addActionListener(e -> {
-            if (selected == null) return;
-            selected.setMicMuted(micButton.isSelected());
-            updateToolbar();
-        });
-
-        speakerButton = new JToggleButton(Icons.speaker());
-        speakerButton.setToolTipText("Deafen / undeafen (mute speakers) on this server");
-        speakerButton.addActionListener(e -> {
-            if (selected == null) return;
-            selected.setDeafened(speakerButton.isSelected());
-            updateToolbar();
-        });
-
-        awayButton = new DropDownToggleButton(Icons.away(),
-                "Away on this server (the arrow offers the global actions and presets)",
-                this::buildAwayMenu);
-        awayButton.addActionListener(e -> {
-            if (selected == null) return;
-            // The plain toggle carries no message; the menu is where messages are chosen.
-            selected.setAway(awayButton.isSelected(), "");
-            updateToolbar();
-        });
-
-        JButton settingsButton = new JButton(Icons.settings());
-        settingsButton.setToolTipText("Options");
-        settingsButton.addActionListener(e -> showSettings());
-
-        tb.add(connectButton);
-        tb.add(disconnectButton);
-        tb.addSeparator();
-        tb.add(activeButton);
-        tb.add(micButton);
-        tb.add(speakerButton);
-        tb.add(awayButton);
-        tb.addSeparator();
-        tb.add(settingsButton);
-        tb.add(Box.createHorizontalGlue());
-        return tb;
     }
 
     /** Rebuilds the icon-bearing chrome after the active icon pack changed. */
     private void rebuildIcons() {
         setIconImage(Icons.app().getImage());
-        setJMenuBar(buildMenuBar());
+        menuBar = buildMenuBar();
+        setJMenuBar(menuBar);
         remove(toolbar);
         toolbar = buildToolbar();
         add(toolbar, BorderLayout.NORTH);
         updateToolbar();
         refreshTabs();
+        if (tray != null) tray.refreshIcon();
         revalidate();
         repaint();
     }
 
-    private JPanel buildStatusBar() {
-        JPanel bar = new JPanel(new BorderLayout());
-        bar.setBackground(Theme.STATUS_BG);
-        bar.setBorder(BorderFactory.createEmptyBorder(3, 8, 3, 8));
-        statusLabel.setFont(Theme.UI_FONT);
-        codecLabel.setFont(Theme.UI_FONT);
-        codecLabel.setForeground(Theme.CHAT_SYSTEM);
-        bar.add(statusLabel, BorderLayout.WEST);
-        bar.add(codecLabel, BorderLayout.EAST);
-        return bar;
-    }
-
     // ---- tab management ----
 
     private ServerTab newTab() {
@@ -376,6 +347,7 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         ServerTab previous = micTab;
         micTab = tab;
         refreshTabs();
+        updateTray();
         // Closing and reopening the capture line can block briefly; keep it off the EDT.
         new Thread(() -> {
             if (previous != null) previous.setMicrophoneActive(false);
@@ -411,6 +383,12 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
             updateToolbar();
             updateStatusLabel();
         }
+        updateTray();
+    }
+
+    /** The local client on {@code tab} started or stopped talking, muted itself, … */
+    void selfStateChanged(ServerTab tab) {
+        if (tabs.contains(tab)) updateTray();
     }
 
     void tabConnected(ServerTab tab) {
@@ -427,26 +405,151 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         tabUpdated(tab);
     }
 
-    // ---- push to talk ----
+    // ---- hotkeys ----
 
-    private void installPushToTalk() {
-        KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(new KeyEventDispatcher() {
-            @Override
-            public boolean dispatchKeyEvent(KeyEvent e) {
-                if (settings.inputMode != Settings.InputMode.PUSH_TO_TALK) return false;
-                ServerTab tab = micTab;
-                if (tab == null || !tab.isConnected() || tab.connection().getMicrophone() == null) return false;
-                if (e.getKeyCode() != settings.pushToTalkKey) return false;
-                if (e.getID() == KeyEvent.KEY_PRESSED && !pttPressed) {
-                    pttPressed = true;
-                    tab.connection().getMicrophone().setPushToTalk(true);
-                } else if (e.getID() == KeyEvent.KEY_RELEASED) {
-                    pttPressed = false;
-                    tab.connection().getMicrophone().setPushToTalk(false);
-                }
-                return false;
+    /**
+     * Which connections a fired hotkey reaches: with "on active server" ticked only the
+     * selected tab, otherwise every connected one.
+     */
+    List<ServerTab> hotkeyTargets(boolean activeServerOnly) {
+        List<ServerTab> out = new ArrayList<>();
+        if (activeServerOnly) {
+            if (selected != null && selected.isConnected()) out.add(selected);
+            return out;
+        }
+        for (ServerTab tab : tabs) {
+            if (tab.isConnected()) out.add(tab);
+        }
+        return out;
+    }
+
+    ServerTab selectedTab() {
+        return selected;
+    }
+
+    List<ServerTab> allTabs() {
+        return new ArrayList<>(tabs);
+    }
+
+    /** Opens the microphone while a push-to-talk hotkey is held. */
+    void setPushToTalk(boolean talking) {
+        pttPressed = talking;
+        ServerTab tab = micTab;
+        if (tab == null || !tab.isConnected() || tab.connection().getMicrophone() == null) return;
+        tab.connection().getMicrophone().setPushToTalk(talking);
+    }
+
+    void moveMicrophoneToSelectedTab() {
+        if (selected != null && selected.isConnected()) setMicTab(selected);
+        updateToolbar();
+    }
+
+    /** Connects to the bookmark with this label; no label means the first one. */
+    void connectBookmark(String label, boolean newTab) {
+        Bookmark match = null;
+        for (Bookmark b : bookmarks.all()) {
+            if (label == null || label.isBlank() || label.equalsIgnoreCase(b.label)) {
+                match = b;
+                break;
             }
-        });
+        }
+        if (match == null) return;
+        if (newTab) selectTab(newTab());
+        connectToBookmark(match);
+    }
+
+    /** Selects the tab with this 1-based number, as the "Select Server Tab" action names it. */
+    void selectTabNumber(int number) {
+        if (number >= 1 && number <= tabs.size()) selectTab(tabs.get(number - 1));
+    }
+
+    void stepTab(int delta) {
+        if (tabs.isEmpty()) return;
+        int index = Math.max(0, tabs.indexOf(selected));
+        selectTab(tabs.get(Math.floorMod(index + delta, tabs.size())));
+    }
+
+    void setSoundsMuted(boolean muted) {
+        sounds.setMuted(muted);
+    }
+
+    boolean areSoundsMuted() {
+        return sounds.isMuted();
+    }
+
+    void adjustMasterVolume(double delta) {
+        settings.outputVolume = Math.max(0, Math.min(2.0, settings.outputVolume + delta));
+        settings.save();
+        applyOutputSettingsToAllTabs();
+        updateStatusLabel();
+    }
+
+    /** Applies a new nickname, or asks for one when the hotkey carries none. */
+    void changeNickname(String nickname) {
+        if (nickname == null || nickname.isBlank()) {
+            changeNickname();
+            return;
+        }
+        settings.nickname = nickname.trim();
+        settings.save();
+        for (ServerTab tab : tabs) tab.setNickname(settings.nickname);
+    }
+
+    void browseCurrentChannel() {
+        if (selected == null || !selected.isConnected()) return;
+        ChannelNode channel = selected.currentChannel();
+        if (channel != null) selected.browseFiles(channel);
+    }
+
+    void reloadSkin() {
+        IconTheme.get().reload(settings);
+    }
+
+    void bringToFront() {
+        setVisible(true);
+        setExtendedState(getExtendedState() & ~JFrame.ICONIFIED);
+        toFront();
+        requestFocus();
+    }
+
+    void sendToBack() {
+        setExtendedState(getExtendedState() | JFrame.ICONIFIED);
+    }
+
+    /**
+     * The values a parameterised hotkey action can take, for the tree in the hotkey
+     * dialog: the saved bookmarks, the installed sound packs and the channels of the
+     * server on screen.
+     */
+    private List<String> hotkeyArgumentChoices(com.ts3client.hotkey.HotkeyAction action) {
+        List<String> out = new ArrayList<>();
+        switch (action.argument()) {
+            case BOOKMARK -> {
+                for (Bookmark b : bookmarks.all()) {
+                    if (b.label != null && !b.label.isBlank()) out.add(b.label);
+                }
+            }
+            case PROFILE -> {
+                if (action == com.ts3client.hotkey.HotkeyAction.SOUNDPACK_ACTIVATE) {
+                    for (com.ts3client.sound.SoundPack pack : sounds.availablePacks()) out.add(pack.name());
+                }
+            }
+            case CHANNEL -> {
+                if (selected != null && selected.isConnected()) {
+                    out.addAll(selected.channelPaths());
+                }
+            }
+            default -> {
+            }
+        }
+        return out;
+    }
+
+    /** Repaints the chrome after a hotkey changed the local client's state. */
+    void refreshAfterHotkey() {
+        updateToolbar();
+        updateTray();
+        refreshTabs();
     }
 
     // ---- actions ----
@@ -511,7 +614,7 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         if (joinChannel.isSelected()) bookmark.channel = channelPath;
         bookmarks.add(bookmark);
         bookmarks.save();
-        rebuildBookmarksMenu();
+        menuBar.rebuildBookmarks();
     }
 
     /** The away button's drop-down: the global actions, the presets and their editor. */
@@ -548,9 +651,9 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         return menu;
     }
 
-    private void toggleAway() {
+    private void toggleAway(boolean away) {
         if (selected == null) return;
-        selected.setAway(awayItem.isSelected(), "");
+        selected.setAway(away, "");
         updateToolbar();
     }
 
@@ -618,6 +721,14 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
             tab.shutdown();
         }
         soundPlayer.shutdown();
+        hotkeys.dispose();
+        if (tray != null) tray.dispose();
+    }
+
+    /** Leaves every server and ends the process. */
+    private void quit() {
+        shutdown();
+        System.exit(0);
     }
 
     private void showIdentities() {
@@ -630,7 +741,7 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         SettingsDialog dlg = new SettingsDialog(this, settings,
                 micTab == null ? null : micTab.connection().getMicrophone(),
                 selected == null ? null : selected.connection().getPlayback(),
-                sounds,
+                sounds, hotkeys,
                 this::applyOutputSettingsToAllTabs);
         dlg.setVisible(true);
     }
@@ -640,7 +751,7 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         soundPlayer.setOutputDevice(settings.outputDevice);
         for (ServerTab tab : tabs) {
             if (tab.connection().getPlayback() == null) continue;
-            tab.connection().getPlayback().setMasterVolume(settings.outputVolume);
+            tab.connection().getPlayback().setMasterVolume(settings.effectiveOutputVolume());
             tab.connection().getPlayback().setOutputDevice(settings.outputDevice);
         }
     }
@@ -660,7 +771,7 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
                         "An open-source TeamSpeak 3 desktop client built on the ts3j\n" +
                         "reverse-engineered protocol library, with native Opus voice,\n" +
                         "voice-activation detection and push-to-talk.\n\n" +
-                        codecLabel.getText(),
+                        statusBar.codecText(),
                 "About TS3J", JOptionPane.INFORMATION_MESSAGE);
     }
 
@@ -668,32 +779,39 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
 
     private void updateToolbar() {
         boolean connected = selected != null && selected.isConnected();
-        disconnectButton.setEnabled(connected);
-        micButton.setEnabled(connected);
-        speakerButton.setEnabled(connected);
-        activeButton.setEnabled(connected);
-        awayItem.setEnabled(connected);
-        awayStatusItem.setEnabled(connected);
-        // The menu's actions are global, so the arrow stays live while any server is up.
-        awayButton.setEnabled(tabs.stream().anyMatch(ServerTab::isConnected));
-        awayButton.setToggleEnabled(connected);
-        commanderItem.setEnabled(connected);
+        boolean anyConnected = tabs.stream().anyMatch(ServerTab::isConnected);
 
         boolean micMuted = connected && selected.isMicMuted();
         boolean deaf = connected && selected.isDeafened();
-        micButton.setSelected(micMuted);
-        micButton.setIcon(micMuted ? Icons.micMutedLarge() : Icons.mic());
-        speakerButton.setSelected(deaf);
-        speakerButton.setIcon(deaf ? Icons.speakerMutedLarge() : Icons.speaker());
-        activeButton.setSelected(selected != null && selected == micTab);
+        boolean active = selected != null && selected == micTab;
         boolean away = connected && selected.isAway();
-        awayItem.setSelected(away);
-        awayButton.setSelected(away);
-        commanderItem.setSelected(connected && selected.isCommander());
+        boolean commander = connected && selected.isCommander();
+        toolbar.refresh(connected, anyConnected, micMuted, deaf, active, away);
+        menuBar.refresh(connected, away, commander);
+        updateTray();
+    }
+
+    /**
+     * The server the tray icon speaks for: the one holding the microphone, or the
+     * visible one when nobody is capturing.
+     */
+    private ServerTab trayTab() {
+        if (micTab != null && micTab.isConnected()) return micTab;
+        return selected != null && selected.isConnected() ? selected : null;
+    }
+
+    private void updateTray() {
+        if (tray == null) return;
+        ServerTab tab = trayTab();
+        if (tab == null) {
+            tray.update(SelfState.DISCONNECTED, null);
+        } else {
+            tray.update(tab.selfState(), tab.title());
+        }
     }
 
     private void updateStatusLabel() {
-        statusLabel.setText(selected == null ? "Not connected" : selected.status());
+        statusBar.setStatus(selected == null ? "Not connected" : selected.status());
     }
 
     private void updateConnectionStatus() {
@@ -706,6 +824,6 @@ public final class MainFrame extends JFrame implements ServerTabPane.Listener {
         double ping = tab.connection().getPingMillis();
         if (ping >= 0) s.append("  |  ping ").append(Math.round(ping)).append(" ms");
         if (tab != micTab) s.append("  |  microphone on another tab");
-        statusLabel.setText(s.toString());
+        statusBar.setStatus(s.toString());
     }
 }

ts3-client/swing/src/main/java/com/ts3client/ui/MainMenuBar.java

@@ -0,0 +1,155 @@
+package com.ts3client.ui;
+
+import com.ts3client.config.Bookmark;
+import com.ts3client.config.Bookmarks;
+
+import javax.swing.JCheckBoxMenuItem;
+import javax.swing.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
+import javax.swing.KeyStroke;
+
+/**
+ * The main window's menu bar: Connections, Bookmarks, Self, Tools and Help.
+ * Talks to {@link MainFrame} only through {@link Listener}; the away/commander
+ * item states are pushed in by {@link #refresh}, mirroring how {@link MainToolbar}
+ * is kept in sync.
+ */
+final class MainMenuBar extends JMenuBar {
+
+    interface Listener {
+        void onConnect();
+
+        void onDisconnect();
+
+        void onCloseTab();
+
+        void onQuit();
+
+        void onToggleMic();
+
+        void onToggleSpeaker();
+
+        /** The plain toggle carries no message; "Set away status…" is where messages are chosen. */
+        void onAwayToggle(boolean away);
+
+        void onAwayStatus();
+
+        void onCommanderToggle(boolean commander);
+
+        void onChangeNickname();
+
+        void onShowIdentities();
+
+        void onShowSettings();
+
+        void onShowAbout();
+
+        void onConnectBookmark(Bookmark bookmark);
+
+        void onAddCurrentServerBookmark();
+
+        void onManageBookmarks();
+    }
+
+    private final Bookmarks bookmarks;
+    private final Listener listener;
+
+    private JMenu bookmarksMenu;
+    private JCheckBoxMenuItem awayItem;
+    private JMenuItem awayStatusItem;
+    private JCheckBoxMenuItem commanderItem;
+
+    MainMenuBar(Bookmarks bookmarks, Listener listener) {
+        this.bookmarks = bookmarks;
+        this.listener = listener;
+
+        JMenu connections = new JMenu("Connections");
+        JMenuItem connect = new JMenuItem("Connect…", Icons.of("CONNECT"));
+        connect.setAccelerator(KeyStroke.getKeyStroke("control S"));
+        connect.addActionListener(e -> listener.onConnect());
+        JMenuItem disconnect = new JMenuItem("Disconnect", Icons.of("DISCONNECT"));
+        disconnect.addActionListener(e -> listener.onDisconnect());
+        JMenuItem closeTab = new JMenuItem("Close tab", Icons.of("CLOSE_BUTTON"));
+        closeTab.setAccelerator(KeyStroke.getKeyStroke("control W"));
+        closeTab.addActionListener(e -> listener.onCloseTab());
+        JMenuItem quit = new JMenuItem("Quit", Icons.of("QUIT"));
+        quit.addActionListener(e -> listener.onQuit());
+        connections.add(connect);
+        connections.add(disconnect);
+        connections.add(closeTab);
+        connections.addSeparator();
+        connections.add(quit);
+
+        bookmarksMenu = new JMenu("Bookmarks");
+        rebuildBookmarks();
+
+        JMenu self = new JMenu("Self");
+        JMenuItem mute = new JMenuItem("Toggle microphone", Icons.of("CAPTURE"));
+        mute.addActionListener(e -> listener.onToggleMic());
+        JMenuItem deaf = new JMenuItem("Toggle speakers", Icons.of("PLAYBACK"));
+        deaf.addActionListener(e -> listener.onToggleSpeaker());
+        awayItem = new JCheckBoxMenuItem("Away", Icons.of("AWAY"), false);
+        awayItem.addActionListener(e -> listener.onAwayToggle(awayItem.isSelected()));
+        awayStatusItem = new JMenuItem("Set away status…", Icons.of("EDIT"));
+        awayStatusItem.addActionListener(e -> listener.onAwayStatus());
+        commanderItem = new JCheckBoxMenuItem("Channel commander", Icons.of("CHANNEL_COMMANDER"), false);
+        commanderItem.addActionListener(e -> listener.onCommanderToggle(commanderItem.isSelected()));
+        JMenuItem nick = new JMenuItem("Change nickname…", Icons.of("CHANGE_NICKNAME"));
+        nick.addActionListener(e -> listener.onChangeNickname());
+        self.add(mute);
+        self.add(deaf);
+        self.addSeparator();
+        self.add(awayItem);
+        self.add(awayStatusItem);
+        self.add(commanderItem);
+        self.addSeparator();
+        self.add(nick);
+
+        JMenu tools = new JMenu("Tools");
+        JMenuItem identitiesItem = new JMenuItem("Identities…", Icons.of("IDENTITY_MANAGER"));
+        identitiesItem.addActionListener(e -> listener.onShowIdentities());
+        JMenuItem options = new JMenuItem("Options…", Icons.of("SETTINGS"));
+        options.addActionListener(e -> listener.onShowSettings());
+        tools.add(identitiesItem);
+        tools.addSeparator();
+        tools.add(options);
+
+        JMenu help = new JMenu("Help");
+        JMenuItem about = new JMenuItem("About", Icons.of("ABOUT"));
+        about.addActionListener(e -> listener.onShowAbout());
+        help.add(about);
+
+        add(connections);
+        add(bookmarksMenu);
+        add(self);
+        add(tools);
+        add(help);
+    }
+
+    /** Reflects the current tab's away/commander state on the menu items. */
+    void refresh(boolean connected, boolean away, boolean commander) {
+        awayItem.setEnabled(connected);
+        awayStatusItem.setEnabled(connected);
+        commanderItem.setEnabled(connected);
+        awayItem.setSelected(away);
+        commanderItem.setSelected(commander);
+    }
+
+    /** Re-lists the saved bookmarks; called after they change (add, remove, manage…). */
+    void rebuildBookmarks() {
+        bookmarksMenu.removeAll();
+        for (Bookmark b : bookmarks.all()) {
+            JMenuItem item = new JMenuItem(b.displayName(), Icons.of("SERVER_GREEN"));
+            item.addActionListener(e -> listener.onConnectBookmark(b));
+            bookmarksMenu.add(item);
+        }
+        if (!bookmarks.all().isEmpty()) bookmarksMenu.addSeparator();
+        JMenuItem addCurrent = new JMenuItem("Add current server…", Icons.of("BOOKMARK_ADD"));
+        addCurrent.addActionListener(e -> listener.onAddCurrentServerBookmark());
+        JMenuItem manage = new JMenuItem("Manage bookmarks…", Icons.of("BOOKMARK_MANAGER"));
+        manage.addActionListener(e -> listener.onManageBookmarks());
+        bookmarksMenu.add(addCurrent);
+        bookmarksMenu.add(manage);
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/MainToolbar.java

@@ -0,0 +1,226 @@
+package com.ts3client.ui;
+
+import com.ts3client.config.Settings;
+
+import javax.swing.BorderFactory;
+import javax.swing.Box;
+import javax.swing.JButton;
+import javax.swing.JCheckBoxMenuItem;
+import javax.swing.JComponent;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JPopupMenu;
+import javax.swing.JSlider;
+import javax.swing.JToggleButton;
+import javax.swing.JToolBar;
+import javax.swing.event.PopupMenuEvent;
+import javax.swing.event.PopupMenuListener;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.FlowLayout;
+
+/**
+ * The main window's toolbar: connect/disconnect, the per-tab mic/speaker/away
+ * controls, and the Master Volume slider on the right. A right-click anywhere on
+ * the bar opens a customization menu for the window's optional chrome (this
+ * toolbar has no say over the status bar's own visibility beyond reporting the
+ * toggle).
+ *
+ * <p>Talks to {@link MainFrame} only through {@link Listener}, so it owns no
+ * connection/tab state itself &mdash; {@link #refresh} is handed everything it
+ * needs to redraw each time the selection changes.
+ */
+final class MainToolbar extends JToolBar {
+
+    interface Listener {
+        void onConnect();
+
+        void onDisconnect();
+
+        /** Moves the microphone to the tab on screen. */
+        void onActivate();
+
+        void onMicMuteToggle(boolean muted);
+
+        void onDeafenToggle(boolean deafened);
+
+        /** The plain toggle carries no message; the drop-down arrow is where messages are chosen. */
+        void onAwayToggle(boolean away);
+
+        JPopupMenu buildAwayMenu();
+
+        void onSettings();
+
+        /** The slider changed; push the new master volume to every open connection. */
+        void onMasterVolumeChanged();
+
+        void onStatusBarVisibilityChanged(boolean visible);
+    }
+
+    private final Settings settings;
+    private final Listener listener;
+
+    private final JButton connectButton;
+    private final JButton disconnectButton;
+    private final JToggleButton activeButton;
+    private final JToggleButton micButton;
+    private final JToggleButton speakerButton;
+    private final DropDownToggleButton awayButton;
+    private final JComponent masterVolumePanel;
+
+    MainToolbar(Settings settings, Listener listener) {
+        this.settings = settings;
+        this.listener = listener;
+
+        setFloatable(false);
+        setBackground(Theme.toolbarBg());
+        setBorder(BorderFactory.createEmptyBorder(4, 6, 4, 6));
+        setComponentPopupMenu(buildContextMenu());
+
+        connectButton = new JButton(Icons.connect());
+        connectButton.setToolTipText("Connect to a server");
+        connectButton.addActionListener(e -> listener.onConnect());
+
+        disconnectButton = new JButton(Icons.disconnect());
+        disconnectButton.setToolTipText("Disconnect");
+        disconnectButton.addActionListener(e -> listener.onDisconnect());
+
+        activeButton = new JToggleButton(Icons.micActive());
+        activeButton.setToolTipText("Speak on this server (moves the microphone to this tab)");
+        activeButton.addActionListener(e -> listener.onActivate());
+
+        micButton = new JToggleButton(Icons.mic());
+        micButton.setToolTipText("Mute / unmute microphone on this server");
+        micButton.addActionListener(e -> listener.onMicMuteToggle(micButton.isSelected()));
+
+        speakerButton = new JToggleButton(Icons.speaker());
+        speakerButton.setToolTipText("Deafen / undeafen (mute speakers) on this server");
+        speakerButton.addActionListener(e -> listener.onDeafenToggle(speakerButton.isSelected()));
+
+        awayButton = new DropDownToggleButton(Icons.away(),
+                "Away on this server (the arrow offers the global actions and presets)",
+                listener::buildAwayMenu);
+        awayButton.addActionListener(e -> listener.onAwayToggle(awayButton.isSelected()));
+
+        JButton settingsButton = new JButton(Icons.settings());
+        settingsButton.setToolTipText("Options");
+        settingsButton.addActionListener(e -> listener.onSettings());
+
+        add(connectButton);
+        add(disconnectButton);
+        addSeparator();
+        add(activeButton);
+        add(micButton);
+        add(speakerButton);
+        add(awayButton);
+        addSeparator();
+        add(settingsButton);
+        add(Box.createHorizontalGlue());
+        masterVolumePanel = buildMasterVolumeControl();
+        masterVolumePanel.setVisible(settings.showMasterVolumeSlider);
+        add(masterVolumePanel);
+    }
+
+    /** Reflects the current tab's state on the buttons. */
+    void refresh(boolean connected, boolean anyConnected, boolean micMuted, boolean deafened,
+                boolean active, boolean away) {
+        disconnectButton.setEnabled(connected);
+        micButton.setEnabled(connected);
+        speakerButton.setEnabled(connected);
+        activeButton.setEnabled(connected);
+        // The away menu's actions are global, so the arrow stays live while any server is up.
+        awayButton.setEnabled(anyConnected);
+        awayButton.setToggleEnabled(connected);
+
+        micButton.setSelected(micMuted);
+        micButton.setIcon(micMuted ? Icons.micMutedLarge() : Icons.mic());
+        speakerButton.setSelected(deafened);
+        speakerButton.setIcon(deafened ? Icons.speakerMutedLarge() : Icons.speaker());
+        activeButton.setSelected(active);
+        awayButton.setSelected(away);
+    }
+
+    /** Simulates a click, for the "Toggle microphone" menu item. */
+    void clickMic() {
+        micButton.doClick();
+    }
+
+    /** Simulates a click, for the "Toggle speakers" menu item. */
+    void clickSpeaker() {
+        speakerButton.doClick();
+    }
+
+    /** The Master Volume slider: multiplies both voice and notification volume. */
+    private JComponent buildMasterVolumeControl() {
+        JPanel panel = new JPanel(new FlowLayout(FlowLayout.RIGHT, 4, 0));
+        panel.setOpaque(false);
+        panel.setAlignmentY(Component.CENTER_ALIGNMENT);
+
+        JLabel icon = new JLabel(Icons.speaker());
+        icon.setToolTipText("Master volume (voice + notifications)");
+        icon.setAlignmentY(Component.CENTER_ALIGNMENT);
+
+        JSlider slider = new JSlider(0, 200, (int) Math.round(settings.masterVolume * 100));
+        slider.setOpaque(false);
+        slider.setToolTipText("Master volume (voice + notifications) — scroll to adjust");
+        slider.setAlignmentY(Component.CENTER_ALIGNMENT);
+        slider.setPreferredSize(new Dimension(135, slider.getPreferredSize().height));
+        slider.addChangeListener(e -> {
+            settings.masterVolume = slider.getValue() / 100.0;
+            listener.onMasterVolumeChanged();
+            // Only touch the disk once the drag (or a wheel step) has settled.
+            if (!slider.getValueIsAdjusting()) settings.save();
+        });
+        slider.addMouseWheelListener(e -> {
+            int step = e.getWheelRotation() < 0 ? 5 : -5;
+            slider.setValue(slider.getValue() + step);
+            e.consume();
+        });
+
+        panel.add(icon);
+        panel.add(slider);
+        return panel;
+    }
+
+    /** Right-click on the toolbar: toggles for the window's optional chrome. */
+    private JPopupMenu buildContextMenu() {
+        JPopupMenu menu = new JPopupMenu();
+
+        JCheckBoxMenuItem statusBarItem = new JCheckBoxMenuItem("Show Status Bar", settings.showStatusBar);
+        statusBarItem.addActionListener(e -> {
+            settings.showStatusBar = statusBarItem.isSelected();
+            settings.save();
+            listener.onStatusBarVisibilityChanged(settings.showStatusBar);
+        });
+
+        JCheckBoxMenuItem volumeItem = new JCheckBoxMenuItem("Show Master Volume Slider", settings.showMasterVolumeSlider);
+        volumeItem.addActionListener(e -> {
+            settings.showMasterVolumeSlider = volumeItem.isSelected();
+            settings.save();
+            masterVolumePanel.setVisible(settings.showMasterVolumeSlider);
+            revalidate();
+            repaint();
+        });
+
+        menu.add(statusBarItem);
+        menu.add(volumeItem);
+        // Either toggle can also be flipped elsewhere (or via settings.properties), so
+        // re-sync the ticks each time the menu is about to be shown.
+        menu.addPopupMenuListener(new PopupMenuListener() {
+            @Override
+            public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
+                statusBarItem.setSelected(settings.showStatusBar);
+                volumeItem.setSelected(settings.showMasterVolumeSlider);
+            }
+
+            @Override
+            public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
+            }
+
+            @Override
+            public void popupMenuCanceled(PopupMenuEvent e) {
+            }
+        });
+        return menu;
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/MicrophoneTest.java

@@ -0,0 +1,181 @@
+package com.ts3client.ui;
+
+import com.ts3client.audio.VoiceInput;
+import com.ts3client.audio.desktop.AudioDevices;
+import com.ts3client.audio.desktop.AudioPlayback;
+import com.ts3client.audio.desktop.DesktopVoiceInput;
+import com.ts3client.config.Settings;
+
+import javax.swing.SwingUtilities;
+import java.util.concurrent.ArrayBlockingQueue;
+import java.util.function.Consumer;
+
+/**
+ * Drives the settings dialog's microphone test from a real capture chain.
+ *
+ * <p>The dialog runs its own {@link DesktopVoiceInput} rather than borrowing the connected
+ * one, whose listeners belong to the connection. Because it is the same class that feeds
+ * the server, the level and the gate shown here are exactly what would be transmitted —
+ * pre-processing, voice detection, hangover and pre-roll included.
+ *
+ * <p>Loopback is optional: when enabled, the frames that would be sent are played back
+ * locally so you can hear precisely what the other side would.
+ */
+final class MicrophoneTest {
+
+    /** Frames buffered for loopback before the oldest is dropped (~100 ms). */
+    private static final int LOOPBACK_QUEUE_FRAMES = 5;
+
+    private final Consumer<Double> onLevel;
+    private final Consumer<Boolean> onTransmitting;
+
+    private DesktopVoiceInput mic;
+
+    private final ArrayBlockingQueue<byte[]> loopbackQueue =
+            new ArrayBlockingQueue<>(LOOPBACK_QUEUE_FRAMES);
+    private volatile boolean loopbackEnabled;
+    private volatile boolean loopbackRunning;
+    private Thread loopbackThread;
+    private String outputDevice = "";
+
+    MicrophoneTest(Consumer<Double> onLevel, Consumer<Boolean> onTransmitting) {
+        this.onLevel = onLevel;
+        this.onTransmitting = onTransmitting;
+    }
+
+    /** Whether a capture chain is currently running. */
+    boolean isRunning() {
+        return mic != null;
+    }
+
+    /**
+     * (Re)starts the test chain against {@code settings}' devices and voice options.
+     *
+     * @return false if the capture device could not be opened
+     */
+    boolean start(Settings settings) {
+        stop();
+        DesktopVoiceInput input = new DesktopVoiceInput(settings);
+        input.setLevelListener(db -> SwingUtilities.invokeLater(() -> onLevel.accept(db)));
+        input.setTalkListener(talking -> SwingUtilities.invokeLater(() -> onTransmitting.accept(talking)));
+        input.setMonitorListener(this::enqueueForLoopback);
+        this.outputDevice = settings.outputDevice;
+        try {
+            input.start();
+        } catch (RuntimeException e) {
+            return false; // Device busy or gone; leave the test switched off.
+        }
+        this.mic = input;
+        return true;
+    }
+
+    /**
+     * Stops the capture chain. The caller owns the UI reset: doing it here would race with
+     * a restart, whose own state has already been put on screen.
+     */
+    void stop() {
+        setLoopback(false);
+        if (mic != null) {
+            mic.stop();
+            mic = null;
+        }
+    }
+
+    /** Applies a change to the test chain, if it is running. */
+    void configure(Consumer<VoiceInput> change) {
+        VoiceInput m = mic;
+        if (m != null) change.accept(m);
+    }
+
+    /** The playback device to loop back through; takes effect on the next enable. */
+    void setOutputDevice(String deviceId) {
+        this.outputDevice = deviceId == null ? "" : deviceId;
+    }
+
+    void setLoopback(boolean enabled) {
+        if (enabled == loopbackEnabled) {
+            return;
+        }
+        loopbackEnabled = enabled;
+        if (enabled) {
+            loopbackRunning = true;
+            loopbackThread = new Thread(this::loopbackLoop, "settings-loopback");
+            loopbackThread.setDaemon(true);
+            loopbackThread.start();
+        } else {
+            loopbackRunning = false;
+            if (loopbackThread != null) {
+                loopbackThread.interrupt();
+                loopbackThread = null;
+            }
+            loopbackQueue.clear();
+        }
+    }
+
+    /**
+     * Converts a transmitted frame to 16-bit PCM and queues it. Runs on the capture thread,
+     * so it must not block: a full queue means playback has fallen behind and the oldest
+     * frame is dropped instead.
+     */
+    private void enqueueForLoopback(float[] interleaved, int channels) {
+        if (!loopbackEnabled) {
+            return;
+        }
+        byte[] pcm = toPcm16(interleaved);
+        if (!loopbackQueue.offer(pcm)) {
+            loopbackQueue.poll();
+            loopbackQueue.offer(pcm);
+        }
+    }
+
+    private void loopbackLoop() {
+        AudioPlayback line = null;
+        try {
+            // The monitored frames are mono for voice; ask for a matching line so no
+            // channel juggling is needed, and up-mix only if the device insists on stereo.
+            line = AudioDevices.openPlayback(outputDevice, 1);
+            line.start();
+            int channels = line.channels();
+            while (loopbackRunning) {
+                byte[] frame = loopbackQueue.poll(100, java.util.concurrent.TimeUnit.MILLISECONDS);
+                if (frame == null) {
+                    continue;
+                }
+                byte[] out = (channels == 1) ? frame : upmix(frame, channels);
+                line.write(out, 0, out.length);
+            }
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        } catch (Exception ignored) {
+            // The device may be busy or gone; the test simply runs without loopback.
+        } finally {
+            if (line != null) line.close();
+        }
+    }
+
+    /** Converts float samples in [-1, 1] to 16-bit little-endian PCM. */
+    static byte[] toPcm16(float[] samples) {
+        byte[] pcm = new byte[samples.length * 2];
+        for (int i = 0; i < samples.length; i++) {
+            float f = samples[i];
+            if (f > 1f) f = 1f;
+            else if (f < -1f) f = -1f;
+            int s = Math.round(f * 32767f);
+            pcm[2 * i] = (byte) (s & 0xFF);
+            pcm[2 * i + 1] = (byte) ((s >> 8) & 0xFF);
+        }
+        return pcm;
+    }
+
+    /** Copies a mono frame across {@code channels} interleaved channels. */
+    static byte[] upmix(byte[] mono, int channels) {
+        byte[] out = new byte[mono.length * channels];
+        for (int i = 0, frames = mono.length / 2; i < frames; i++) {
+            for (int c = 0; c < channels; c++) {
+                out[2 * (i * channels + c)] = mono[2 * i];
+                out[2 * (i * channels + c) + 1] = mono[2 * i + 1];
+            }
+        }
+        return out;
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/NicknameCellEditor.java

@@ -0,0 +1,124 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.ClientEntry;
+
+import javax.swing.DefaultCellEditor;
+import javax.swing.JLabel;
+import javax.swing.JTextField;
+import javax.swing.JTree;
+import javax.swing.SwingUtilities;
+import javax.swing.Timer;
+import javax.swing.tree.DefaultMutableTreeNode;
+import javax.swing.tree.DefaultTreeCellEditor;
+import javax.swing.tree.DefaultTreeCellRenderer;
+import javax.swing.tree.TreePath;
+import java.awt.Component;
+import java.awt.event.MouseEvent;
+import java.util.EventObject;
+import java.util.function.IntPredicate;
+
+/**
+ * Turns our own row in the server tree into a text field on a double click, the way
+ * TeamSpeak renames a client in place. Only that one row is editable; every other
+ * double click keeps its usual meaning (joining a channel, opening a chat).
+ *
+ * <p>The field opens on the current nickname with it selected, so typing replaces it,
+ * Enter commits and Escape leaves the name alone.
+ */
+final class NicknameCellEditor extends DefaultTreeCellEditor {
+
+    /** Pulls the field left by its own border, so the text sits where the label did. */
+    private static final int FIELD_NUDGE = 2;
+
+    /** Long enough for the click's own release to have been handled first. */
+    private static final int SELECT_DELAY_MS = 80;
+
+    private final JTextField field;
+    /** Whether a client id is our own — the tree learns ours only once connected. */
+    private final IntPredicate isSelf;
+
+    private NicknameCellEditor(JTree tree, DefaultTreeCellRenderer renderer, JTextField field,
+                               IntPredicate isSelf) {
+        super(tree, renderer, new DefaultCellEditor(field));
+        this.field = field;
+        this.isSelf = isSelf;
+    }
+
+    static NicknameCellEditor create(JTree tree, DefaultTreeCellRenderer renderer, IntPredicate isSelf) {
+        JTextField field = new JTextField();
+        // Only our own row is edited, and that name is bold in the tree.
+        field.setFont(Theme.uiBold());
+        return new NicknameCellEditor(tree, renderer, field, isSelf);
+    }
+
+    /** Whether a path is the row this editor works on. */
+    boolean editsPath(TreePath path) {
+        ClientEntry client = clientOf(path);
+        return client != null && isSelf.test(client.id);
+    }
+
+    /**
+     * Editing is started by the tree's own double-click handling, which works a row by
+     * its whole line; Swing's would only see clicks that land on the label, and its
+     * click-pause-click timer would rename on clicks meant as a selection.
+     */
+    @Override
+    public boolean isCellEditable(EventObject event) {
+        return !(event instanceof MouseEvent);
+    }
+
+    @Override
+    public Component getTreeCellEditorComponent(JTree tree, Object value, boolean isSelected,
+                                                boolean expanded, boolean leaf, int row) {
+        // The node itself has to reach super, whose renderer measures the row from it;
+        // the text it derives is the node's toString, so the nickname is filled in after.
+        Component c = super.getTreeCellEditorComponent(tree, value, isSelected, expanded, leaf, row);
+        ClientEntry client = clientOf(value);
+        if (client != null) {
+            field.setText(client.nickname);
+            field.selectAll();
+        }
+        SwingUtilities.invokeLater(field::requestFocusInWindow);
+        // The double click that opened the field ends in a release, which a text
+        // component turns into a caret placement — undoing any selection made before
+        // it. Selecting after that has been delivered is what leaves the whole name
+        // selected, ready to be typed over.
+        Timer select = new Timer(SELECT_DELAY_MS, e -> field.selectAll());
+        select.setRepeats(false);
+        select.start();
+        return c;
+    }
+
+    /**
+     * Keeps the row's own icon while it is being edited. The inherited version knows
+     * only the renderer's default leaf/branch icons, which would swap a client's state
+     * icon for a blank page for as long as the field is open.
+     */
+    @Override
+    protected void determineOffset(JTree tree, Object value, boolean isSelected, boolean expanded,
+                                   boolean leaf, int row) {
+        super.determineOffset(tree, value, isSelected, expanded, leaf, row);
+        Component c = renderer.getTreeCellRendererComponent(tree, value, isSelected, expanded, leaf,
+                row, false);
+        if (!(c instanceof JLabel)) return;
+        editingIcon = ((JLabel) c).getIcon();
+        offset = editingIcon == null ? 0
+                : editingIcon.getIconWidth() + renderer.getIconTextGap() - FIELD_NUDGE;
+    }
+
+    /** The edited nickname, trimmed; empty when nothing usable was typed. */
+    String editedNickname() {
+        String text = field.getText();
+        return text == null ? "" : text.trim();
+    }
+
+    private static ClientEntry clientOf(TreePath path) {
+        return path == null ? null : clientOf(path.getLastPathComponent());
+    }
+
+    private static ClientEntry clientOf(Object node) {
+        if (!(node instanceof DefaultMutableTreeNode)) return null;
+        Object obj = ((DefaultMutableTreeNode) node).getUserObject();
+        return obj instanceof ClientEntry ? (ClientEntry) obj : null;
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/SelfState.java

@@ -0,0 +1,55 @@
+package com.ts3client.ui;
+
+import javax.swing.ImageIcon;
+
+/**
+ * The state of the local client on one server, as the tree shows it for any other
+ * client — the states are listed in the order the official client gives them
+ * priority, the strongest one first.
+ */
+enum SelfState {
+
+    DISCONNECTED("Not connected"),
+    DEAFENED("Speakers muted"),
+    MIC_MUTED("Microphone muted"),
+    MIC_LOCAL_MUTED("Microphone locally muted"),
+    AWAY("Away"),
+    COMMANDER_TALKING("Talking (channel commander)"),
+    COMMANDER("Channel commander"),
+    TALKING("Talking"),
+    IDLE("Connected");
+
+    private final String label;
+
+    SelfState(String label) {
+        this.label = label;
+    }
+
+    String label() {
+        return label;
+    }
+
+    /** The icon this state is drawn with, from the active icon pack. */
+    ImageIcon icon(int size) {
+        switch (this) {
+            case DISCONNECTED:
+                return Icons.app(size);
+            case DEAFENED:
+                return Icons.speakerMuted(size);
+            case MIC_MUTED:
+                return Icons.micMuted(size);
+            case MIC_LOCAL_MUTED:
+                return Icons.micLocalMuted(size);
+            case AWAY:
+                return Icons.clientAway(size);
+            case COMMANDER_TALKING:
+                return Icons.clientCommanderTalking(size);
+            case COMMANDER:
+                return Icons.clientCommander(size);
+            case TALKING:
+                return Icons.clientTalking(size);
+            default:
+                return Icons.clientIdle(size);
+        }
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/ServerGroupsDialog.java

@@ -0,0 +1,117 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.ClientEntry;
+import com.ts3client.net.Group;
+import com.ts3client.net.TeamspeakConnection;
+
+import javax.swing.BorderFactory;
+import javax.swing.BoxLayout;
+import javax.swing.GrayFilter;
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+import javax.swing.JCheckBox;
+import javax.swing.JDialog;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.SwingConstants;
+import java.awt.BorderLayout;
+import java.awt.Dimension;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Every regular server group on the server, as a scrollable checkbox list. Groups
+ * the local client has no power to (un)assign are shown too, so the client's full
+ * membership is visible, but greyed out and disabled.
+ */
+final class ServerGroupsDialog extends JDialog {
+
+    private final TeamspeakConnection conn;
+    private final GroupIcons groupIcons;
+    private final int clientId;
+    private final ServerTreePanel.Actions actions;
+
+    private final JPanel list = new JPanel();
+    private final JLabel header = new JLabel();
+    /** Cached grayscale icons, keyed by the source icon's identity. */
+    private final Map<ImageIcon, ImageIcon> grayscale = new HashMap<>();
+
+    ServerGroupsDialog(MainFrame owner, TeamspeakConnection conn, GroupIcons groupIcons,
+                        ClientEntry client, ServerTreePanel.Actions actions) {
+        super(owner, "Server Groups", true);
+        this.conn = conn;
+        this.groupIcons = groupIcons;
+        this.clientId = client.id;
+        this.actions = actions;
+
+        list.setLayout(new BoxLayout(list, BoxLayout.Y_AXIS));
+        JScrollPane scroll = new JScrollPane(list);
+        scroll.setPreferredSize(new Dimension(280, 360));
+        scroll.getVerticalScrollBar().setUnitIncrement(16);
+
+        header.setBorder(BorderFactory.createEmptyBorder(8, 10, 4, 10));
+        header.setHorizontalAlignment(SwingConstants.LEFT);
+
+        JButton close = new JButton("Close");
+        close.addActionListener(a -> dispose());
+        JPanel buttons = new JPanel();
+        buttons.add(close);
+        getRootPane().setDefaultButton(close);
+
+        getContentPane().setLayout(new BorderLayout());
+        getContentPane().add(header, BorderLayout.NORTH);
+        getContentPane().add(scroll, BorderLayout.CENTER);
+        getContentPane().add(buttons, BorderLayout.SOUTH);
+
+        Dialogs.closeOnEscape(this);
+        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
+        refresh();
+        pack();
+        setLocationRelativeTo(owner);
+    }
+
+    /** Rebuilds the list from the current model state; closes the dialog if the client left. */
+    void refresh() {
+        ClientEntry client = conn.getModel().getClient(clientId);
+        if (client == null) {
+            dispose();
+            return;
+        }
+        header.setText(client.nickname);
+
+        int addPower = conn.getModel().selfPermissionValue("i_group_needed_member_add_power");
+        int removePower = conn.getModel().selfPermissionValue("i_group_needed_member_remove_power");
+        List<Group> groups = conn.getModel().allServerGroups();
+
+        list.removeAll();
+        for (Group g : groups) {
+            boolean assigned = contains(client.serverGroupIds, g.id);
+            boolean allowed = ClientMenu.canAssign(g, assigned, addPower, removePower);
+
+            ImageIcon icon = groupIcons.iconOf(g);
+            JCheckBox box = new JCheckBox(g.name, allowed ? icon : grayscale(icon));
+            box.setSelected(assigned);
+            box.setEnabled(allowed);
+            box.setAlignmentX(0f);
+            if (allowed) {
+                box.addActionListener(a -> actions.setClientServerGroup(client, g, box.isSelected()));
+            }
+            list.add(box);
+        }
+        list.revalidate();
+        list.repaint();
+    }
+
+    private ImageIcon grayscale(ImageIcon icon) {
+        if (icon == null) return null;
+        return grayscale.computeIfAbsent(icon,
+                i -> new ImageIcon(GrayFilter.createDisabledImage(i.getImage())));
+    }
+
+    private static boolean contains(int[] ids, int id) {
+        for (int i : ids) if (i == id) return true;
+        return false;
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/ServerMenu.java

@@ -0,0 +1,28 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.ChannelSettings;
+
+import javax.swing.JMenuItem;
+import javax.swing.JPopupMenu;
+
+/**
+ * The context menu for the server itself — the tree's root row.
+ */
+final class ServerMenu {
+
+    private ServerMenu() {
+    }
+
+    static JPopupMenu build(ServerTreePanel.Actions actions) {
+        JPopupMenu menu = new JPopupMenu();
+        JMenuItem create = new JMenuItem("Create Channel", Icons.of("CHANNEL_CREATE"));
+        create.addActionListener(a -> actions.createChannel(null, ChannelSettings.Type.PERMANENT));
+        menu.add(create);
+        JMenuItem spacer = new JMenuItem("Create Spacer",
+                Icons.ofAny("CHANNEL_CREATE_SPACER", "CHANNEL_CREATE"));
+        spacer.setToolTipText("Create a new spacer");
+        spacer.addActionListener(a -> actions.createSpacer());
+        menu.add(spacer);
+        return menu;
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/ServerTab.java

@@ -6,15 +6,15 @@ import com.ts3client.config.IdentityStore;
 import com.ts3client.config.Settings;
 import com.ts3client.net.ChannelNode;
 import com.ts3client.net.ClientEntry;
-import com.ts3client.net.ConnectionListener;
 import com.ts3client.net.TeamspeakConnection;
 import com.ts3client.sound.SoundNotifier;
 import com.ts3client.text.TsLink;
 
 import javax.swing.JComponent;
-import javax.swing.JOptionPane;
 import javax.swing.JSplitPane;
 import javax.swing.SwingUtilities;
+import java.util.ArrayList;
+import java.util.List;
 import java.awt.Component;
 
 /**
@@ -22,10 +22,12 @@ import java.awt.Component;
  * client keeps several of these side by side; {@link MainFrame} shows one at a
  * time and owns the toolbar, menus and status bar that act on it.
  *
- * <p>Everything that is per-server lives here: the connection, its microphone
- * and speaker mute state, the away/commander flags and the chat history.
+ * <p>ServerTab itself owns the connection, the panels and this tab's identity
+ * (title/status); the mic/away/deafen flags live in {@link ServerTabSelfState},
+ * tree context-menu actions and selection in {@link ServerTabTreeActions}, and
+ * {@link com.ts3client.net.ConnectionListener} callbacks in {@link ServerTabConnectionEvents}.
  */
-final class ServerTab implements ConnectionListener, ServerTreePanel.Actions {
+final class ServerTab implements ServerTabConnectionEvents.Listener {
 
     private final MainFrame host;
     private final Settings settings;
@@ -33,10 +35,16 @@ final class ServerTab implements ConnectionListener, ServerTreePanel.Actions {
 
     private final TeamspeakConnection conn;
     private final GroupIcons groupIcons;
+    private final ServerTabConnectionEvents events;
+    private final ServerTabSelfState selfState;
+    private final ServerTabTreeActions treeActions;
     private final ServerTreePanel treePanel;
     private final ChatPanel chatPanel;
     private final InfoPanel infoPanel = new InfoPanel();
     private final JComponent component;
+    private JSplitPane leftColumn;
+    private int normalDividerSize;
+    private int savedDividerLocation = -1;
 
     /** Label shown in the tab bar: the server name once known, the address before that. */
     private String title = "New connection";
@@ -46,42 +54,61 @@ final class ServerTab implements ConnectionListener, ServerTreePanel.Actions {
     /** Identity used for the current connection, so it can be saved into a bookmark. */
     private String identityId = "";
 
-    private boolean micMuted;
-    private boolean deafened;
-    private boolean away;
-    /** Away message currently published, empty when away carries no message. */
-    private String awayMessage = "";
-    private boolean commander;
-
-    private Object currentSelection;
-
     ServerTab(MainFrame host, Settings settings, IdentityStore identities, AudioBackend audio,
               SoundNotifier sounds) {
         this.host = host;
         this.settings = settings;
         this.identities = identities;
-        this.conn = new TeamspeakConnection(settings, audio, this, sounds);
+
+        // ServerTabConnectionEvents must exist before the connection (which needs a
+        // listener up front), and TeamspeakConnection must exist before the tree/chat
+        // panels and the other tab helpers that read from it — so wiring finishes with
+        // an explicit attach() once everything is built. Nothing fires callbacks before then.
+        this.events = new ServerTabConnectionEvents(host, this, this);
+        this.conn = new TeamspeakConnection(settings, audio, events, sounds);
         this.groupIcons = new GroupIcons(conn.getIcons());
-        this.treePanel = new ServerTreePanel(conn.getModel(), groupIcons, this);
+        this.selfState = new ServerTabSelfState(conn);
         this.chatPanel = new ChatPanel();
+        this.treeActions = new ServerTabTreeActions(host, this, conn, chatPanel, infoPanel, groupIcons);
+        this.treePanel = new ServerTreePanel(conn.getModel(), groupIcons, treeActions);
+        treeActions.attach(treePanel);
+        events.attach(conn, treePanel, chatPanel, selfState, treeActions);
 
         chatPanel.setSendHandler(this::onSendChat);
         chatPanel.setLinkHandler(new ChatPanel.LinkHandler() {
             @Override
             public void onClientLink(TsLink.Ref ref, Component source, int x, int y) {
-                ServerTab.this.onClientLink(ref, source, x, y);
+                treeActions.handleClientLink(ref, source, x, y);
             }
 
             @Override
             public void onChannelLink(TsLink.Ref ref, Component source, int x, int y) {
-                ServerTab.this.onChannelLink(ref, source, x, y);
+                treeActions.handleChannelLink(ref, source, x, y);
             }
         });
         chatPanel.setInputEnabled(false);
 
-        JSplitPane leftColumn = new JSplitPane(JSplitPane.VERTICAL_SPLIT, treePanel, infoPanel);
+        infoPanel.setDescriptionHandler(new InfoPanel.DescriptionHandler() {
+            @Override
+            public void showInfoTab(String html, Runnable onClose) {
+                chatPanel.openDescriptionTab("info", Icons.channelClientPair(), "", html, onClose);
+            }
+
+            @Override
+            public void closeInfoTab() {
+                chatPanel.closeNoteTab("info");
+            }
+
+            @Override
+            public void setPanelHidden(boolean hidden) {
+                ServerTab.this.setInfoPanelHidden(hidden);
+            }
+        });
+
+        leftColumn = new JSplitPane(JSplitPane.VERTICAL_SPLIT, treePanel, infoPanel);
         leftColumn.setResizeWeight(0.68);
         leftColumn.setContinuousLayout(true);
+        normalDividerSize = leftColumn.getDividerSize();
 
         JSplitPane split = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, leftColumn, chatPanel);
         split.setResizeWeight(0.55);
@@ -134,23 +161,32 @@ final class ServerTab implements ConnectionListener, ServerTreePanel.Actions {
     }
 
     boolean isMicMuted() {
-        return micMuted;
+        return selfState.isMicMuted();
+    }
+
+    boolean isMicLocalMuted() {
+        return selfState.isMicLocalMuted();
     }
 
     boolean isDeafened() {
-        return deafened;
+        return selfState.isDeafened();
     }
 
     boolean isAway() {
-        return away;
+        return selfState.isAway();
     }
 
     String awayMessage() {
-        return awayMessage;
+        return selfState.awayMessage();
     }
 
     boolean isCommander() {
-        return commander;
+        return selfState.isCommander();
+    }
+
+    /** What the local client looks like on this server, for the tray icon. */
+    SelfState selfState() {
+        return selfState.compute();
     }
 
     /** Path of the channel we are in, or empty when not connected. */
@@ -174,8 +210,7 @@ final class ServerTab implements ConnectionListener, ServerTreePanel.Actions {
         title = address + ":" + port;
         chatPanel.appendSystem("Connecting to " + address + ":" + port
                 + (channel == null || channel.isBlank() ? "" : " (channel \"" + channel + "\")") + " …");
-        onStatus("Loading identity…");
-        host.tabUpdated(this);
+        events.onStatus("Loading identity…");
 
         // Resolving may have to generate a first identity, so keep it off the EDT.
         new Thread(() -> {
@@ -184,7 +219,7 @@ final class ServerTab implements ConnectionListener, ServerTreePanel.Actions {
                 entry = identities.resolve(settings, identityId);
             } catch (Exception e) {
                 connecting = false;
-                onError("Could not load identity: " + e.getMessage());
+                events.onError("Could not load identity: " + e.getMessage());
                 return;
             }
             SwingUtilities.invokeLater(() -> {
@@ -209,19 +244,36 @@ final class ServerTab implements ConnectionListener, ServerTreePanel.Actions {
         if (conn.isConnected()) conn.disconnectBlocking("Leaving");
     }
 
+    // ---- ServerTabConnectionEvents.Listener ----
+
+    @Override
+    public void setStatus(String status) {
+        this.status = status;
+    }
+
+    @Override
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    @Override
+    public void setConnecting(boolean connecting) {
+        this.connecting = connecting;
+    }
+
     // ---- self state ----
 
     void setMicMuted(boolean muted) {
-        micMuted = muted;
-        conn.setMicMuted(muted);
-        chatPanel.appendSystem(muted ? "Microphone muted." : "Microphone active.");
+        selfState.setMicMuted(muted);
+    }
+
+    /** TS3's "Local Mic Mute": silences capture without publishing a status change. */
+    void setMicLocalMuted(boolean muted) {
+        selfState.setMicLocalMuted(muted);
     }
 
     void setDeafened(boolean deaf) {
-        deafened = deaf;
-        conn.setDeafened(deaf);
-        if (deaf) micMuted = true;
-        chatPanel.appendSystem(deaf ? "Speakers muted (deafened)." : "Speakers active.");
+        selfState.setDeafened(deaf);
     }
 
     /** Hands the capture device to (or takes it from) this connection. */
@@ -234,16 +286,11 @@ final class ServerTab implements ConnectionListener, ServerTreePanel.Actions {
      *                message outlives coming back, so toggling away again restores it
      */
     void setAway(boolean away, String message) {
-        this.away = away;
-        if (message != null) this.awayMessage = message;
-        conn.setAway(away, awayMessage);
-        chatPanel.appendSystem(!away ? "No longer away."
-                : awayMessage.isEmpty() ? "Away." : "Away: " + awayMessage);
+        selfState.setAway(away, message);
     }
 
     void setCommander(boolean commander) {
-        this.commander = commander;
-        conn.setChannelCommander(commander);
+        selfState.setCommander(commander);
     }
 
     void setNickname(String nickname) {
@@ -275,261 +322,56 @@ final class ServerTab implements ConnectionListener, ServerTreePanel.Actions {
         }
     }
 
-    /** A client link in the chat log was clicked: show the same menu as the tree does. */
-    private void onClientLink(TsLink.Ref ref, Component source, int x, int y) {
-        ClientEntry client = conn.getModel().getClient(ref.id);
-        // The id is only valid for the session the link was made in; fall back to
-        // the unique id (and finally the nickname) so older links still resolve.
-        if (client == null || (!ref.uniqueId.isEmpty() && !ref.uniqueId.equals(client.uniqueId))) {
-            ClientEntry byUid = ref.uniqueId.isEmpty() ? null
-                    : conn.getModel().findClientByUniqueId(ref.uniqueId);
-            if (byUid == null && !ref.name.isEmpty()) byUid = conn.getModel().findClientByName(ref.name);
-            if (byUid != null) client = byUid;
-        }
-        if (client == null) {
-            chatPanel.appendSystem("That client is no longer on the server.");
-            return;
-        }
-        ClientMenu.build(client, client.id == conn.getSelfClientId(), this).show(source, x, y);
-    }
-
-    private void onChannelLink(TsLink.Ref ref, Component source, int x, int y) {
-        ChannelNode channel = conn.getModel().getChannel(ref.id);
-        if (channel == null) {
-            chatPanel.appendSystem("That channel no longer exists.");
-            return;
-        }
-        ChannelMenu.build(channel, this).show(source, x, y);
-    }
-
     private String peerName(int clientId) {
         ClientEntry c = conn.getModel().getClient(clientId);
         return c != null ? c.nickname : "Client " + clientId;
     }
 
-    // ---- ServerTreePanel.Actions ----
-
-    @Override
-    public void joinChannel(int channelId) {
-        if (conn.isConnected()) conn.joinChannel(channelId, null);
+    /** Joins the channel at a "/"-separated path, as the hotkey action names it. */
+    void joinChannelPath(String path) {
+        if (!conn.isConnected() || path == null || path.isBlank()) return;
+        ChannelNode target = conn.getModel().findChannelByPath(path);
+        if (target != null) conn.joinChannel(target.id, null);
     }
 
-    @Override
-    public void moveClientToChannel(ClientEntry client, ChannelNode target) {
-        if (!conn.isConnected()) return;
-        if (client.id == conn.getSelfClientId()) {
-            conn.joinChannel(target.id, null);
-        } else {
-            conn.moveClient(client.id, target.id, null);
-        }
+    /** Every channel of this server as a "/"-separated path, in the tree's own order. */
+    List<String> channelPaths() {
+        List<String> out = new ArrayList<>();
+        if (!conn.isConnected()) return out;
+        for (ChannelNode root : conn.getModel().buildTree()) collectPaths(root, out);
+        return out;
     }
 
-    @Override
-    public void moveChannel(ChannelNode channel, int newParentId, int orderPredecessorId) {
-        if (conn.isConnected()) conn.moveChannel(channel.id, newParentId, orderPredecessorId);
+    private void collectPaths(ChannelNode channel, List<String> out) {
+        out.add(conn.getModel().channelPath(channel.id));
+        for (ChannelNode child : channel.children) collectPaths(child, out);
     }
 
-    @Override
-    public void openPrivateChat(ClientEntry client) {
-        chatPanel.openPrivateChat(client.id, client.nickname);
-    }
-
-    @Override
-    public void pokeClient(ClientEntry client) {
-        String msg = JOptionPane.showInputDialog(host, "Poke message for " + client.nickname + ":", "Poke!");
-        if (msg != null) conn.poke(client.id, msg);
-    }
-
-    @Override
-    public void kickClientFromChannel(ClientEntry client) {
-        String reason = kickReason("Kick Client from Channel", client);
-        if (reason != null) conn.kickFromChannel(client.id, reason);
-    }
-
-    @Override
-    public void kickClientFromServer(ClientEntry client) {
-        String reason = kickReason("Kick Client from Server", client);
-        if (reason != null) conn.kickFromServer(client.id, reason);
-    }
-
-    private String kickReason(String title, ClientEntry client) {
+    /** The channel we are in, or null when not connected. */
+    ChannelNode currentChannel() {
         if (!conn.isConnected()) return null;
-        return ReasonDialog.prompt(host, title, "Reason for kicking " + client.nickname + ":",
-                ReasonDialog.KICK_REASON_LIMIT);
-    }
-
-    @Override
-    public void banClient(ClientEntry client) {
-        if (!conn.isConnected()) return;
-        BanDialog dialog = new BanDialog(host, client.nickname);
-        dialog.setVisible(true);
-        if (dialog.isConfirmed()) conn.banClient(client.id, dialog.getSeconds(), dialog.getReason());
-    }
-
-    @Override
-    public void toggleClientMute(ClientEntry client) {
-        if (conn.getPlayback() == null) return;
-        boolean now = !conn.getPlayback().isClientMuted(client.id);
-        conn.getPlayback().setClientMuted(client.id, now);
-        chatPanel.appendSystem((now ? "Muted " : "Unmuted ") + client.nickname + ".");
-    }
-
-    @Override
-    public void showConnectionInfo(ClientEntry client) {
-        if (!conn.isConnected()) return;
-        new ConnectionInfoDialog(host, conn, client.id, client.nickname).setVisible(true);
-    }
-
-    @Override
-    public void moveClientToOwnChannel(ClientEntry client) {
-        if (!conn.isConnected() || client.id == conn.getSelfClientId()) return;
         ClientEntry self = conn.getModel().getClient(conn.getSelfClientId());
-        if (self != null) conn.moveClient(client.id, self.channelId, null);
+        return self == null ? null : conn.getModel().getChannel(self.channelId);
     }
 
-    @Override
-    public void setChannelSubscribed(ChannelNode channel, boolean family, boolean subscribed) {
-        if (conn.isConnected()) conn.setChannelsSubscribed(channel.familyIds(family), subscribed);
+    /** Opens the file repository browser for a channel, as the "Browse Files" hotkey/menu action does. */
+    void browseFiles(ChannelNode channel) {
+        treeActions.browseFiles(channel);
     }
 
-    @Override
-    public void browseFiles(ChannelNode channel) {
-        if (!conn.canTransferFiles()) return;
-        new FileBrowserDialog(host, conn, channel).setVisible(true);
-    }
-
-    @Override
-    public boolean isClientLocallyMuted(int clientId) {
-        return conn.getPlayback() != null && conn.getPlayback().isClientMuted(clientId);
-    }
-
-    @Override
-    public void onSelectionChanged(Object userObject) {
-        currentSelection = userObject;
-        renderInfo();
-        if (!conn.isConnected()) return;
-        if (userObject instanceof ChannelNode) {
-            ChannelNode ch = (ChannelNode) userObject;
-            if (!ch.descriptionLoaded) conn.requestChannelInfo(ch.id);
-        } else if (userObject instanceof ClientEntry) {
-            conn.requestClientInfo(((ClientEntry) userObject).id);
-        }
-    }
-
-    private void renderInfo() {
-        Object sel = currentSelection;
-        if (sel instanceof ChannelNode) {
-            infoPanel.showChannel((ChannelNode) sel);
-        } else if (sel instanceof ClientEntry) {
-            infoPanel.showClient((ClientEntry) sel, conn.getModel(), conn.getIcons());
+    /** Collapses the info panel to nothing while its content lives in the chat tab, or restores it. */
+    private void setInfoPanelHidden(boolean hidden) {
+        if (hidden == !infoPanel.isVisible()) return;
+        if (hidden) {
+            savedDividerLocation = leftColumn.getDividerLocation();
+            infoPanel.setVisible(false);
+            leftColumn.setDividerSize(0);
+            leftColumn.setDividerLocation(1.0);
         } else {
-            infoPanel.clear();
+            infoPanel.setVisible(true);
+            leftColumn.setDividerSize(normalDividerSize);
+            if (savedDividerLocation >= 0) leftColumn.setDividerLocation(savedDividerLocation);
         }
-    }
-
-    // ---- ConnectionListener (marshal to EDT) ----
-
-    @Override
-    public void onStatus(String text) {
-        SwingUtilities.invokeLater(() -> {
-            status = text;
-            host.tabUpdated(this);
-        });
-    }
-
-    @Override
-    public void onConnected() {
-        SwingUtilities.invokeLater(() -> {
-            connecting = false;
-            treePanel.setSelfClientId(conn.getSelfClientId());
-            micMuted = false;
-            deafened = false;
-            away = false;
-            awayMessage = "";
-            commander = false;
-            chatPanel.setInputEnabled(true);
-            chatPanel.appendSystem("Connected.");
-            host.tabConnected(this);
-        });
-    }
-
-    @Override
-    public void onDisconnected(String reason) {
-        SwingUtilities.invokeLater(() -> {
-            connecting = false;
-            conn.getModel().clear();
-            treePanel.showDisconnected();
-            currentSelection = null;
-            infoPanel.clear();
-            chatPanel.setInputEnabled(false);
-            chatPanel.closePrivateChats();
-            chatPanel.appendSystem("Disconnected" + (reason == null || reason.isEmpty() ? "." : ": " + reason));
-            host.tabDisconnected(this);
-        });
-    }
-
-    @Override
-    public void onModelChanged() {
-        SwingUtilities.invokeLater(() -> {
-            treePanel.rebuild();
-            renderInfo();
-            String name = conn.getModel().getServerName();
-            if (conn.isConnected() && name != null && !name.isBlank() && !name.equals(title)) {
-                title = name;
-                host.tabUpdated(this);
-            }
-        });
-    }
-
-    @Override
-    public void onInfoUpdated() {
-        SwingUtilities.invokeLater(this::renderInfo);
-    }
-
-    @Override
-    public void onIconsUpdated() {
-        SwingUtilities.invokeLater(() -> {
-            treePanel.refreshRowSizes();
-            renderInfo();
-        });
-    }
-
-    @Override
-    public void onChat(ChatScope scope, int fromClientId, String fromName, String message) {
-        switch (scope) {
-            case PRIVATE:
-                chatPanel.appendPrivateMessage(fromClientId, fromName, fromClientId, fromName, message);
-                break;
-            case SERVER:
-                chatPanel.appendServerMessage(fromClientId, fromName, message);
-                break;
-            default:
-                chatPanel.appendChannelMessage(fromClientId, fromName, message);
-                break;
-        }
-    }
-
-    @Override
-    public void onTalkStateChanged(int clientId, boolean talking) {
-        SwingUtilities.invokeLater(treePanel::refreshVisual);
-    }
-
-    @Override
-    public void onError(String message) {
-        SwingUtilities.invokeLater(() -> {
-            chatPanel.appendSystem("Error: " + message);
-            status = message;
-            host.tabUpdated(this);
-        });
-    }
-
-    @Override
-    public void onPoke(String fromName, String message) {
-        SwingUtilities.invokeLater(() -> {
-            chatPanel.appendSystem("You were poked by " + fromName + ": " + message);
-            host.selectTab(this);
-            JOptionPane.showMessageDialog(host, fromName + " poked you:\n\n" + message,
-                    "Poke", JOptionPane.INFORMATION_MESSAGE);
-        });
+        leftColumn.revalidate();
     }
 }

ts3-client/swing/src/main/java/com/ts3client/ui/ServerTabConnectionEvents.java

@@ -0,0 +1,161 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.ConnectionListener;
+import com.ts3client.net.TeamspeakConnection;
+
+import javax.swing.JOptionPane;
+import javax.swing.SwingUtilities;
+
+/**
+ * Marshals {@link ConnectionListener} callbacks onto the EDT and fans them out to
+ * this tab's views (tree, chat, info panel) and to {@link MainFrame}.
+ *
+ * <p>Constructed before the {@link TeamspeakConnection} it listens to exists — the
+ * connection's constructor needs a listener up front — so {@link #attach} wires the
+ * rest of the tab in once everything else has been built.
+ */
+final class ServerTabConnectionEvents implements ConnectionListener {
+
+    /** The handful of {@link ServerTab} fields this class updates but can't reach directly. */
+    interface Listener {
+        void setStatus(String status);
+
+        void setTitle(String title);
+
+        void setConnecting(boolean connecting);
+    }
+
+    private final MainFrame host;
+    private final ServerTab tab;
+    private final Listener listener;
+
+    private TeamspeakConnection conn;
+    private ServerTreePanel treePanel;
+    private ChatPanel chatPanel;
+    private ServerTabSelfState selfState;
+    private ServerTabTreeActions treeActions;
+
+    ServerTabConnectionEvents(MainFrame host, ServerTab tab, Listener listener) {
+        this.host = host;
+        this.tab = tab;
+        this.listener = listener;
+    }
+
+    void attach(TeamspeakConnection conn, ServerTreePanel treePanel, ChatPanel chatPanel,
+                ServerTabSelfState selfState, ServerTabTreeActions treeActions) {
+        this.conn = conn;
+        this.treePanel = treePanel;
+        this.chatPanel = chatPanel;
+        this.selfState = selfState;
+        this.treeActions = treeActions;
+    }
+
+    @Override
+    public void onStatus(String text) {
+        SwingUtilities.invokeLater(() -> {
+            listener.setStatus(text);
+            host.tabUpdated(tab);
+        });
+    }
+
+    @Override
+    public void onConnected() {
+        SwingUtilities.invokeLater(() -> {
+            listener.setConnecting(false);
+            treePanel.setSelfClientId(conn.getSelfClientId());
+            selfState.resetOnConnect();
+            chatPanel.setInputEnabled(true);
+            chatPanel.appendSystem("Connected.");
+            host.tabConnected(tab);
+        });
+    }
+
+    @Override
+    public void onDisconnected(String reason) {
+        SwingUtilities.invokeLater(() -> {
+            listener.setConnecting(false);
+            conn.getModel().clear();
+            treePanel.showDisconnected();
+            treeActions.clearSelection();
+            chatPanel.setInputEnabled(false);
+            chatPanel.closePrivateChats();
+            chatPanel.closeNoteTabs();
+            chatPanel.appendSystem("Disconnected" + (reason == null || reason.isEmpty() ? "." : ": " + reason));
+            host.tabDisconnected(tab);
+        });
+    }
+
+    @Override
+    public void onModelChanged() {
+        SwingUtilities.invokeLater(() -> {
+            treePanel.rebuild();
+            treeActions.renderInfo();
+            treeActions.refreshGroupsDialog();
+            String name = conn.getModel().getServerName();
+            if (conn.isConnected() && name != null && !name.isBlank() && !name.equals(tab.title())) {
+                listener.setTitle(name);
+                host.tabUpdated(tab);
+            }
+        });
+    }
+
+    @Override
+    public void onInfoUpdated() {
+        SwingUtilities.invokeLater(treeActions::renderInfo);
+    }
+
+    @Override
+    public void onIconsUpdated() {
+        SwingUtilities.invokeLater(() -> {
+            treePanel.refreshRowSizes();
+            treeActions.renderInfo();
+        });
+    }
+
+    @Override
+    public void onChat(ChatScope scope, int fromClientId, String fromName, String message) {
+        switch (scope) {
+            case PRIVATE:
+                chatPanel.appendPrivateMessage(fromClientId, fromName, fromClientId, fromName, message);
+                break;
+            case SERVER:
+                chatPanel.appendServerMessage(fromClientId, fromName, message);
+                break;
+            default:
+                chatPanel.appendChannelMessage(fromClientId, fromName, message);
+                break;
+        }
+    }
+
+    @Override
+    public void onTalkStateChanged(int clientId, boolean talking) {
+        SwingUtilities.invokeLater(() -> {
+            treePanel.refreshVisual();
+            if (clientId == conn.getSelfClientId()) host.selfStateChanged(tab);
+        });
+    }
+
+    @Override
+    public void onError(String message) {
+        SwingUtilities.invokeLater(() -> {
+            chatPanel.appendSystem("Error: " + message);
+            listener.setStatus(message);
+            host.tabUpdated(tab);
+        });
+    }
+
+    @Override
+    public void onServerLog(String message) {
+        SwingUtilities.invokeLater(() -> chatPanel.appendServerLog(message));
+    }
+
+    @Override
+    public void onPoke(String fromName, String message) {
+        SwingUtilities.invokeLater(() -> {
+            chatPanel.appendSystem("You were poked by " + fromName + ": " + message);
+            host.selectTab(tab);
+            JOptionPane.showMessageDialog(host, fromName + " poked you:\n\n" + message,
+                    "Poke", JOptionPane.INFORMATION_MESSAGE);
+        });
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/ServerTabPane.java

@@ -34,11 +34,14 @@ final class ServerTabPane extends JPanel {
     private final Listener listener;
     private final JTabbedPane tabbed = new JTabbedPane();
     private final List<ServerTab> tabs = new ArrayList<>();
+    private final TabDragReorder dragReorder = new TabDragReorder(tabbed, this::moveTab);
 
     /** True while the tab strip is in use, i.e. more than one connection is open. */
     private boolean tabbedMode;
     /** Suppresses selection callbacks while we rearrange the pane ourselves. */
     private boolean updating;
+    /** Remembered so a drag-reorder can rebuild the tab labels without the caller's help. */
+    private ServerTab lastMicTab;
 
     ServerTabPane(Listener listener) {
         super(new BorderLayout());
@@ -51,6 +54,24 @@ final class ServerTabPane extends JPanel {
             if (i >= 0 && i < tabs.size()) listener.selectTab(tabs.get(i));
         });
         tabbed.addMouseWheelListener(this::onWheel);
+        dragReorder.attach(tabbed);
+    }
+
+    /** Drags a tab from one position to another, keeping the current selection on screen. */
+    private void moveTab(int from, int to) {
+        if (from < 0 || to < 0 || from >= tabs.size() || to >= tabs.size() || from == to) return;
+        ServerTab selected = tabbed.getSelectedIndex() >= 0 && tabbed.getSelectedIndex() < tabs.size()
+                ? tabs.get(tabbed.getSelectedIndex()) : null;
+        tabs.add(to, tabs.remove(from));
+        updating = true;
+        try {
+            tabbed.removeAll();
+            for (ServerTab tab : tabs) tabbed.addTab(tab.title(), tab.component());
+            if (selected != null) tabbed.setSelectedIndex(tabs.indexOf(selected));
+        } finally {
+            updating = false;
+        }
+        refresh(lastMicTab);
     }
 
     /**
@@ -93,6 +114,7 @@ final class ServerTabPane extends JPanel {
 
     /** Refreshes the tab labels; {@code micTab} is marked as owning the microphone. */
     void refresh(ServerTab micTab) {
+        lastMicTab = micTab;
         if (!tabbedMode) return;
         for (int i = 0; i < tabs.size(); i++) {
             ServerTab tab = tabs.get(i);
@@ -133,7 +155,7 @@ final class ServerTabPane extends JPanel {
         cell.setBorder(BorderFactory.createEmptyBorder(1, 0, 1, 0));
 
         JLabel label = new JLabel(tab.title(), hasMic ? Icons.micActiveSmall() : null, JLabel.LEADING);
-        label.setFont(Theme.UI_FONT);
+        label.setFont(Theme.uiFont());
         label.setToolTipText(hasMic ? "Speaking on this server" : tab.status());
         // A label with a tooltip swallows mouse events, so select the tab explicitly.
         label.addMouseListener(new MouseAdapter() {
@@ -143,14 +165,16 @@ final class ServerTabPane extends JPanel {
             }
         });
         cell.add(label);
+        dragReorder.attach(cell);
+        dragReorder.attach(label);
 
         JButton close = new JButton("✕");
-        close.setFont(Theme.UI_FONT);
+        close.setFont(Theme.uiFont());
         close.setFocusable(false);
         close.setBorder(BorderFactory.createEmptyBorder());
         close.setContentAreaFilled(false);
         close.setMargin(new Insets(0, 0, 0, 0));
-        close.setForeground(Theme.CHAT_SYSTEM);
+        close.setForeground(Theme.chatSystem());
         close.setPreferredSize(new Dimension(14, 14));
         close.setToolTipText("Close this connection");
         close.addActionListener(e -> listener.closeTab(tab));

ts3-client/swing/src/main/java/com/ts3client/ui/ServerTabSelfState.java

@@ -0,0 +1,106 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.ClientEntry;
+import com.ts3client.net.TeamspeakConnection;
+
+/**
+ * Mic/speaker/away/commander flags for one connection, plus forwarding them into
+ * {@link TeamspeakConnection}. Split out of {@link ServerTab} because the flags
+ * are reset together in one place (on (re)connect) and read from several
+ * (tray icon, toolbar, menu checkmarks).
+ */
+final class ServerTabSelfState {
+
+    private final TeamspeakConnection conn;
+
+    private boolean micMuted;
+    private boolean micLocalMuted;
+    private boolean deafened;
+    private boolean away;
+    /** Away message currently published, empty when away carries no message. */
+    private String awayMessage = "";
+    private boolean commander;
+
+    ServerTabSelfState(TeamspeakConnection conn) {
+        this.conn = conn;
+    }
+
+    boolean isMicMuted() {
+        return micMuted;
+    }
+
+    boolean isMicLocalMuted() {
+        return micLocalMuted;
+    }
+
+    boolean isDeafened() {
+        return deafened;
+    }
+
+    boolean isAway() {
+        return away;
+    }
+
+    String awayMessage() {
+        return awayMessage;
+    }
+
+    boolean isCommander() {
+        return commander;
+    }
+
+    void setMicMuted(boolean muted) {
+        micMuted = muted;
+        conn.setMicMuted(muted);
+    }
+
+    /** TS3's "Local Mic Mute": silences capture without publishing a status change. */
+    void setMicLocalMuted(boolean muted) {
+        micLocalMuted = muted;
+        conn.setMicLocalMuted(muted);
+    }
+
+    void setDeafened(boolean deaf) {
+        deafened = deaf;
+        conn.setDeafened(deaf);
+        if (deaf) micMuted = true;
+    }
+
+    /**
+     * @param message the away message, or null to keep the one already set — the
+     *                message outlives coming back, so toggling away again restores it
+     */
+    void setAway(boolean away, String message) {
+        this.away = away;
+        if (message != null) this.awayMessage = message;
+        conn.setAway(away, awayMessage);
+    }
+
+    void setCommander(boolean commander) {
+        this.commander = commander;
+        conn.setChannelCommander(commander);
+    }
+
+    /** Clears all flags on a fresh connection; the server starts us out clean, so nothing to publish. */
+    void resetOnConnect() {
+        micMuted = false;
+        micLocalMuted = false;
+        deafened = false;
+        away = false;
+        awayMessage = "";
+        commander = false;
+    }
+
+    /** What the local client looks like on this server, for the tray icon. */
+    SelfState compute() {
+        if (!conn.isConnected()) return SelfState.DISCONNECTED;
+        if (deafened) return SelfState.DEAFENED;
+        if (micMuted) return SelfState.MIC_MUTED;
+        if (micLocalMuted) return SelfState.MIC_LOCAL_MUTED;
+        if (away) return SelfState.AWAY;
+        ClientEntry self = conn.getModel().getClient(conn.getSelfClientId());
+        boolean talking = self != null && self.talking;
+        if (commander) return talking ? SelfState.COMMANDER_TALKING : SelfState.COMMANDER;
+        return talking ? SelfState.TALKING : SelfState.IDLE;
+    }
+}

ts3-client/swing/src/main/java/com/ts3client/ui/ServerTabTreeActions.java

@@ -0,0 +1,296 @@
+package com.ts3client.ui;
+
+import com.ts3client.net.ChannelNode;
+import com.ts3client.net.ChannelSettings;
+import com.ts3client.net.ClientEntry;
+import com.ts3client.net.Group;
+import com.ts3client.net.TeamspeakConnection;
+import com.ts3client.text.TsLink;
+
+import javax.swing.JOptionPane;
+import javax.swing.SwingUtilities;
+import java.awt.Component;
+
+/**
+ * Context-menu and drag/drop actions for one server's tree, plus tracking which
+ * node is selected so the info panel stays in sync. Also handles client/channel
+ * links clicked in the chat log, which open the same menus as the tree does.
+ *
+ * <p>Constructed before the {@link ServerTreePanel} it drives exists — the tree's
+ * constructor needs an {@link ServerTreePanel.Actions} up front — so {@link #attach}
+ * wires the tree back in once it has been built.
+ */
+final class ServerTabTreeActions implements ServerTreePanel.Actions {
+
+    private final MainFrame host;
+    private final ServerTab tab;
+    private final TeamspeakConnection conn;
+    private final ChatPanel chatPanel;
+    private final InfoPanel infoPanel;
+    private final GroupIcons groupIcons;
+    private ServerTreePanel treePanel;
+
+    private Object currentSelection;
+    /** The one open {@link ServerGroupsDialog}, if any, refreshed whenever the model changes. */
+    private ServerGroupsDialog groupsDialog;
+
+    ServerTabTreeActions(MainFrame host, ServerTab tab, TeamspeakConnection conn,
+                          ChatPanel chatPanel, InfoPanel infoPanel, GroupIcons groupIcons) {
+        this.host = host;
+        this.tab = tab;
+        this.conn = conn;
+        this.chatPanel = chatPanel;
+        this.infoPanel = infoPanel;
+        this.groupIcons = groupIcons;
+    }
+
+    void attach(ServerTreePanel treePanel) {
+        this.treePanel = treePanel;
+    }
+
+    /** Called by {@link ServerTabConnectionEvents} whenever the model changes, to live-refresh an open dialog. */
+    void refreshGroupsDialog() {
+        if (groupsDialog != null) groupsDialog.refresh();
+    }
+
+    /** Refreshes the info panel for whatever is currently selected (or clears it). */
+    void renderInfo() {
+        Object sel = currentSelection;
+        if (sel instanceof ChannelNode) {
+            infoPanel.showChannel((ChannelNode) sel);
+        } else if (sel instanceof ClientEntry) {
+            infoPanel.showClient((ClientEntry) sel, conn.getModel(), conn.getIcons());
+        } else {
+            infoPanel.clear();
+        }
+    }
+
+    /** Drops the selection on disconnect, since the model it points into is gone. */
+    void clearSelection() {
+        currentSelection = null;
+        infoPanel.clear();
+    }
+
+    /** A client link in the chat log was clicked: show the same menu as the tree does. */
+    void handleClientLink(TsLink.Ref ref, Component source, int x, int y) {
+        ClientEntry client = conn.getModel().getClient(ref.id);
+        // The id is only valid for the session the link was made in; fall back to
+        // the unique id (and finally the nickname) so older links still resolve.
+        if (client == null || (!ref.uniqueId.isEmpty() && !ref.uniqueId.equals(client.uniqueId))) {
+            ClientEntry byUid = ref.uniqueId.isEmpty() ? null
+                    : conn.getModel().findClientByUniqueId(ref.uniqueId);
+            if (byUid == null && !ref.name.isEmpty()) byUid = conn.getModel().findClientByName(ref.name);
+            if (byUid != null) client = byUid;
+        }
+        if (client == null) {
+            chatPanel.appendSystem("That client is no longer on the server.");
+            return;
+        }
+        ClientMenu.build(client, client.id == conn.getSelfClientId(), false, conn.getModel(), groupIcons, this)
+                .show(source, x, y);
+    }
+
+    void handleChannelLink(TsLink.Ref ref, Component source, int x, int y) {
+        ChannelNode channel = conn.getModel().getChannel(ref.id);
+        if (channel == null) {
+            chatPanel.appendSystem("That channel no longer exists.");
+            return;
+        }
+        ChannelMenu.build(channel, this).show(source, x, y);
+    }
+
+    // ---- ServerTreePanel.Actions ----
+
+    @Override
+    public void joinChannel(int channelId) {
+        if (conn.isConnected()) conn.joinChannel(channelId, null);
+    }
+
+    @Override
+    public void moveClientToChannel(ClientEntry client, ChannelNode target) {
+        if (!conn.isConnected()) return;
+        if (client.id == conn.getSelfClientId()) {
+            conn.joinChannel(target.id, null);
+        } else {
+            conn.moveClient(client.id, target.id, null);
+        }
+    }
+
+    @Override
+    public void moveChannel(ChannelNode channel, int newParentId, int orderPredecessorId) {
+        if (conn.isConnected()) conn.moveChannel(channel.id, newParentId, orderPredecessorId);
+    }
+
+    @Override
+    public void openPrivateChat(ClientEntry client) {
+        chatPanel.openPrivateChat(client.id, client.nickname);
+    }
+
+    @Override
+    public void pokeClient(ClientEntry client) {
+        String msg = JOptionPane.showInputDialog(host, "Poke message for " + client.nickname + ":", "Poke!");
+        if (msg != null) conn.poke(client.id, msg);
+    }
+
+    @Override
+    public void kickClientFromChannel(ClientEntry client) {
+        String reason = kickReason("Kick Client from Channel", client);
+        if (reason != null) conn.kickFromChannel(client.id, reason);
+    }
+
+    @Override
+    public void kickClientFromServer(ClientEntry client) {
+        String reason = kickReason("Kick Client from Server", client);
+        if (reason != null) conn.kickFromServer(client.id, reason);
+    }
+
+    private String kickReason(String title, ClientEntry client) {
+        if (!conn.isConnected()) return null;
+        return ReasonDialog.prompt(host, title, "Reason for kicking " + client.nickname + ":",
+                ReasonDialog.KICK_REASON_LIMIT);
+    }
+
+    @Override
+    public void banClient(ClientEntry client) {
+        if (!conn.isConnected()) return;
+        BanDialog dialog = new BanDialog(host, client.nickname);
+        dialog.setVisible(true);
+        if (dialog.isConfirmed()) conn.banClient(client.id, dialog.getSeconds(), dialog.getReason());
+    }
+
+    @Override
+    public void toggleClientMute(ClientEntry client) {
+        if (conn.getPlayback() == null) return;
+        boolean now = !conn.getPlayback().isClientMuted(client.id);
+        conn.getPlayback().setClientMuted(client.id, now);
+    }
+
+    @Override
+    public void findClientInTree(ClientEntry client) {
+        host.selectTab(tab);
+        treePanel.selectClient(client.id);
+    }
+
+    @Override
+    public void showConnectionInfo(ClientEntry client) {
+        if (!conn.isConnected()) return;
+        new ConnectionInfoDialog(host, conn, client.id, client.nickname).setVisible(true);
+    }
+
+    @Override
+    public void moveClientToOwnChannel(ClientEntry client) {
+        if (!conn.isConnected() || client.id == conn.getSelfClientId()) return;
+        ClientEntry self = conn.getModel().getClient(conn.getSelfClientId());
+        if (self != null) conn.moveClient(client.id, self.channelId, null);
+    }
+
+    @Override
+    public void setClientServerGroup(ClientEntry client, Group group, boolean assign) {
+        if (conn.isConnected()) conn.setClientServerGroup(client.databaseId, group.id, assign);
+    }
+
+    @Override
+    public void setClientChannelGroup(ClientEntry client, Group group) {
+        if (conn.isConnected()) conn.setClientChannelGroup(client.databaseId, client.channelId, group.id);
+    }
+
+    @Override
+    public void showServerGroupsDialog(ClientEntry client) {
+        if (!conn.isConnected()) return;
+        groupsDialog = new ServerGroupsDialog(host, conn, groupIcons, client, this);
+        groupsDialog.setVisible(true);
+        groupsDialog = null;
+    }
+
+    /**
+     * Reads the description from the server before prompting, since the model only
+     * carries one for clients whose info has been looked at.
+     */
+    @Override
+    public void changeClientDescription(ClientEntry client) {
+        if (!conn.isConnected()) return;
+        conn.requestClientDescription(client.id, (description, error) -> SwingUtilities.invokeLater(() -> {
+            if (error != null) {
+                JOptionPane.showMessageDialog(host, "Could not read the description: " + error,
+                        "Error", JOptionPane.ERROR_MESSAGE);
+                return;
+            }
+            String edited = (String) JOptionPane.showInputDialog(host,
+                    "Description for " + client.nickname + ":", "Change Description",
+                    JOptionPane.PLAIN_MESSAGE, Icons.of("EDIT"), null, description);
+            if (edited == null || edited.equals(description)) return;
+            conn.setClientDescription(client.id, edited, failure -> SwingUtilities.invokeLater(() -> {
+                if (failure != null) {
+                    JOptionPane.showMessageDialog(host, "Could not change the description: " + failure,
+                            "Error", JOptionPane.ERROR_MESSAGE);
+                }
+            }));
+        }));
+    }
+
+    @Override
+    public void renameSelf(String nickname) {
+        host.changeNickname(nickname);
+    }
+
+    @Override
+    public void setChannelSubscribed(ChannelNode channel, boolean family, boolean subscribed) {
+        if (conn.isConnected()) conn.setChannelsSubscribed(channel.familyIds(family), subscribed);
+    }
+
+    @Override
+    public void editChannel(ChannelNode channel) {
+        if (!conn.isConnected()) return;
+        ChannelDialog.toEdit(host, conn, groupIcons, channel).setVisible(true);
+    }
+
+    @Override
+    public void createChannel(ChannelNode parent, ChannelSettings.Type type) {
+        if (!conn.isConnected()) return;
+        ChannelSettings defaults = new ChannelSettings();
+        defaults.type = type;
+        ChannelDialog.toCreate(host, conn, groupIcons,
+                parent == null ? "Create Channel" : "Create Sub-Channel of " + parent.name,
+                parent == null ? 0 : parent.id, defaults).setVisible(true);
+    }
+
+    @Override
+    public void createSpacer() {
+        if (!conn.isConnected()) return;
+        ChannelSettings defaults = new ChannelSettings();
+        // Spacers are cosmetic root channels, so they outlive everyone and, being channels,
+        // need a name no other channel has — which is what the tag's number is for.
+        defaults.name = Spacers.freeName(conn.getModel().childrenOf(0));
+        ChannelDialog.toCreate(host, conn, groupIcons, "Create Spacer", 0, defaults)
+                .setVisible(true);
+    }
+
+    @Override
+    public boolean isConnected() {
+        return conn.isConnected();
+    }
+
+    @Override
+    public void browseFiles(ChannelNode channel) {
+        if (!conn.canTransferFiles()) return;
+        new FileBrowserDialog(host, conn, channel).setVisible(true);
+    }
+
+    @Override
+    public boolean isClientLocallyMuted(int clientId) {
+        return conn.getPlayback() != null && conn.getPlayback().isClientMuted(clientId);
+    }
+
+    @Override
+    public void onSelectionChanged(Object userObject) {
+        currentSelection = userObject;
+        renderInfo();
+        if (!conn.isConnected()) return;
+        if (userObject instanceof ChannelNode) {
+            ChannelNode ch = (ChannelNode) userObject;
+            if (!ch.descriptionLoaded) conn.requestChannelInfo(ch.id);
+        } else if (userObject instanceof ClientEntry) {
+            conn.requestClientInfo(((ClientEntry) userObject).id);
+        }
+    }
+}