diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/NativeLib.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/NativeLib.kt
index ce7021be..12cbe8ef 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/NativeLib.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/NativeLib.kt
@@ -207,6 +207,7 @@ object NativeLib {
                    width: Int = 0, height: Int = 0, rotation: Int = 0, audio: Boolean = true, videoCodec: Int = 1): Int =
         nativeStreamFeed(id, video, pts, key, data, revision, width, height, rotation, audio, videoCodec)
     fun streamTxStats(id: Long): LongArray? = nativeStreamTxStats(id)
+    fun streamSetAudioEnabled(id: Long, enabled: Boolean): Boolean = nativeStreamSetAudioEnabled(id, enabled)
     fun streamStop(id: Long) { nativeStreamStop(id) }
     fun streamPull(id: Long, positionUs: Long = -1, wantVideo: Boolean = true, audioAheadUs: Long = 80000): ByteArray? =
         nativeStreamPull(id, positionUs, wantVideo, audioAheadUs)
@@ -231,6 +232,7 @@ object NativeLib {
     private external fun nativeStreamFeed(id: Long, video: Boolean, pts: Long, key: Boolean, data: ByteArray,
                                          revision: Long, width: Int, height: Int, rotation: Int, audio: Boolean, videoCodec: Int): Int
     private external fun nativeStreamTxStats(id: Long): LongArray?
+    private external fun nativeStreamSetAudioEnabled(id: Long, enabled: Boolean): Boolean
     private external fun nativeStreamStop(id: Long)
     private external fun nativeStreamPull(id: Long, position: Long, wantVideo: Boolean, audioAhead: Long): ByteArray?
     private external fun nativeStreamStatus(id: Long): LongArray?
diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamCaptureEngine.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamCaptureEngine.kt
index 3e788175..b68ad3d2 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamCaptureEngine.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamCaptureEngine.kt
@@ -44,6 +44,7 @@ class StreamCaptureEngine(
     private var audioCapture: MicrophoneCapture.Subscription? = null
     private var audioThread: Thread? = null
     @Volatile private var audioRunning = false
+    @Volatile private var audioMuted = false
     @Volatile var audioCompressorSettings = initialAudioCompressor
     @Volatile private var stopped = false
     private var stopping = false
@@ -434,6 +435,21 @@ class StreamCaptureEngine(
         LogManager.addLog("DEBUG", "video", "video resources released id=$id closed=$closed revision=$generation")
         done(closed)
     }
+    /** Меняем только свою копию PCM; общий микрофон и рация продолжают работать. */
+    fun setAudioEnabled(enabled: Boolean): Boolean {
+        if (!microphone || !audioRunning) {
+            LogManager.addLog("WARN", "stream", "audio change without capture id=$id enabled=$enabled"); return false
+        }
+        val previous = audioMuted
+        audioMuted = !enabled
+        if (!NativeLib.streamSetAudioEnabled(id, enabled)) {
+            audioMuted = previous
+            LogManager.addLog("ERROR", "stream", "audio change refused id=$id enabled=$enabled"); return false
+        }
+        LogManager.addLog("INFO", "stream", "source audio id=$id enabled=$enabled")
+        return true
+    }
+
     @SuppressLint("MissingPermission")
     private fun startAudio() {
         val radio = RadioAudioEngine.instance()
@@ -464,6 +480,7 @@ class StreamCaptureEngine(
                     expected = frame.sequence + 960
                     val pts = (frame.timeNs - originNs) / 1000
                     check(pts >= 0 && pts > last) { "Audio timestamp discontinuity pts=$pts last=$last" }; last = pts
+                    if (audioMuted) frame.pcm.fill(0)
                     val packet = NativeLib.streamOpusEncode(opus, frame.pcm, audioCompressorSettings) ?: error("Stream compressor/Opus encode failed")
                     check(NativeLib.streamFeed(id, false, pts, false, packet) >= 0) { "Stream audio publisher detached" }
                 }
diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamService.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamService.kt
index e6512931..76f33d84 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamService.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamService.kt
@@ -108,6 +108,13 @@ class StreamService : Service() {
         capture!!.change(config)
     }
 
+    fun setAudioEnabled(enabled: Boolean): Boolean {
+        if (stopping || capture == null) {
+            LogManager.addLog("WARN", "stream", "service audio change rejected id=$id"); return false
+        }
+        return capture!!.setAudioEnabled(enabled)
+    }
+
     /** Producers завершатся до FIN; при уничтожении ядра очередь не ждём. */
     fun shutdown(abort: Boolean = false) {
         aborting = aborting || abort