diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamController.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamController.kt
index 86aa465d..c7cff060 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamController.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/data/StreamController.kt
@@ -13,7 +13,8 @@ import java.util.concurrent.atomic.AtomicLong
 
 enum class StreamPhase { STARTING, LIVE, STOPPING, ENDED, FAILED }
 data class StreamState(val id: Long, val group: Long, val phase: StreamPhase, val error: Int? = null,
-                       val config: StreamCaptureConfig? = null, val pendingConfig: StreamCaptureConfig? = null, val notice: Int? = null, val preview: StreamPreview = StreamPreview()) {
+                       val config: StreamCaptureConfig? = null, val pendingConfig: StreamCaptureConfig? = null, val notice: Int? = null,
+                       val preview: StreamPreview = StreamPreview(), val audioAvailable: Boolean = false, val audioEnabled: Boolean = false) {
     val ongoing get() = phase == StreamPhase.STARTING || phase == StreamPhase.LIVE || phase == StreamPhase.STOPPING
 }
 
@@ -43,7 +44,8 @@ object StreamController {
             LogManager.addLog("WARN", "stream", "start rejected: core/call/voice busy group=$group")
             mutable.value = StreamState(id, group, StreamPhase.FAILED, R.string.stream_resources_busy); return
         }
-        capturing = true; mutable.value = StreamState(id, group, StreamPhase.STARTING, pendingConfig = config)
+        capturing = true
+        mutable.value = StreamState(id, group, StreamPhase.STARTING, pendingConfig = config, audioAvailable = audio, audioEnabled = audio)
         mutableTx.value = null
         try {
             ContextCompat.startForegroundService(ChatApplication.instance, Intent(ChatApplication.instance, StreamService::class.java)
@@ -66,6 +68,17 @@ object StreamController {
         owner.change(config)
     }
 
+    fun setAudioEnabled(enabled: Boolean) {
+        check(Looper.myLooper() == Looper.getMainLooper())
+        val st = mutable.value ?: return
+        if (st.phase != StreamPhase.LIVE || !st.audioAvailable || service == null) {
+            LogManager.addLog("WARN", "stream", "audio control unavailable id=${st.id} phase=${st.phase}"); return
+        }
+        if (st.audioEnabled == enabled) return
+        if (service!!.setAudioEnabled(enabled)) mutable.value = st.copy(audioEnabled = enabled)
+        else failed(st.id, "audio control failed enabled=$enabled")
+    }
+
     fun captureReady(id: Long, config: StreamCaptureConfig, restored: Boolean) {
         main.post {
             val st = mutable.value ?: return@post
diff --git a/tools/chatgui-android/app/src/main/res/values-ru/strings.xml b/tools/chatgui-android/app/src/main/res/values-ru/strings.xml
index c8d0f849..d91efc3e 100644
--- a/tools/chatgui-android/app/src/main/res/values-ru/strings.xml
+++ b/tools/chatgui-android/app/src/main/res/values-ru/strings.xml
@@ -23,6 +23,7 @@
     <string name="stream_group_closed">Канал закрыт</string>
     <string name="stream_start">Начать трансляцию</string>
     <string name="stream_stop">Остановить трансляцию</string>
+    <string name="stream_audio">Звук трансляции</string>
     <string name="stream_live">Прямая трансляция</string>
     <string name="stream_connecting">Подключение…</string>
     <string name="stream_stopping">Завершение трансляции…</string>
diff --git a/tools/chatgui-android/app/src/main/res/values/strings.xml b/tools/chatgui-android/app/src/main/res/values/strings.xml
index 0e6139ba..6ec1110d 100644
--- a/tools/chatgui-android/app/src/main/res/values/strings.xml
+++ b/tools/chatgui-android/app/src/main/res/values/strings.xml
@@ -23,6 +23,7 @@
     <string name="stream_group_closed">The channel is closed</string>
     <string name="stream_start">Start stream</string>
     <string name="stream_stop">Stop stream</string>
+    <string name="stream_audio">Stream audio</string>
     <string name="stream_live">Streaming live</string>
     <string name="stream_connecting">Connecting…</string>
     <string name="stream_stopping">Finishing stream…</string>