diff --git a/services/audioflinger/MmapTracks.h b/services/audioflinger/MmapTracks.h
index eb640bb..cb46c52 100644
--- a/services/audioflinger/MmapTracks.h
+++ b/services/audioflinger/MmapTracks.h
@@ -54,6 +54,14 @@
             bool        getAndSetSilencedNotified_l() { bool silencedNotified = mSilencedNotified;
                                                         mSilencedNotified = true;
                                                         return silencedNotified; }
+
+    /**
+     * Updates the mute state and notifies the audio service. Call this only when holding player
+     * thread lock.
+     */
+    void processMuteEvent_l(const sp<IAudioManager>& audioManager,
+                            mute_state_t muteState)
+                            REQUIRES(AudioFlinger::MmapPlaybackThread::mLock);
 private:
     friend class MmapThread;
 
@@ -71,5 +79,12 @@
     pid_t mPid;
     bool  mSilenced;            // protected by MMapThread::mLock
     bool  mSilencedNotified;    // protected by MMapThread::mLock
+
+    // TODO: replace PersistableBundle with own struct
+    // access these two variables only when holding player thread lock.
+    std::unique_ptr<os::PersistableBundle> mMuteEventExtras
+            GUARDED_BY(AudioFlinger::MmapPlaybackThread::mLock);
+    mute_state_t mMuteState
+            GUARDED_BY(AudioFlinger::MmapPlaybackThread::mLock);
 };  // end of Track
 
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 745dbf2..71c24f3 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -10465,6 +10465,14 @@
         }
         for (const sp<MmapTrack> &track : mActiveTracks) {
             track->setMetadataHasChanged();
+            track->processMuteEvent_l(mAudioFlinger->getOrCreateAudioManager(),
+                /*muteState=*/{mMasterMute,
+                               mStreamVolume == 0.f,
+                               mStreamMute,
+                               // TODO(b/241533526): adjust logic to include mute from AppOps
+                               false /*muteFromPlaybackRestricted*/,
+                               false /*muteFromClientVolume*/,
+                               false /*muteFromVolumeShaper*/});
         }
     }
 }
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index 3f9c306..44a93c1 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -3140,6 +3140,38 @@
 {
 }
 
+void AudioFlinger::MmapThread::MmapTrack::processMuteEvent_l(const sp<
+    IAudioManager>& audioManager, mute_state_t muteState)
+{
+    if (mMuteState == muteState) {
+        // mute state did not change, do nothing
+        return;
+    }
+
+    status_t result = UNKNOWN_ERROR;
+    if (audioManager && mPortId != AUDIO_PORT_HANDLE_NONE) {
+        if (mMuteEventExtras == nullptr) {
+            mMuteEventExtras = std::make_unique<os::PersistableBundle>();
+        }
+        mMuteEventExtras->putInt(String16(kExtraPlayerEventMuteKey),
+                                 static_cast<int>(muteState));
+
+        result = audioManager->portEvent(mPortId,
+                                         PLAYER_UPDATE_MUTED,
+                                         mMuteEventExtras);
+    }
+
+    if (result == OK) {
+        mMuteState = muteState;
+    } else {
+        ALOGW("%s(%d): cannot process mute state for port ID %d, status error %d",
+              __func__,
+              id(),
+              mPortId,
+              result);
+    }
+}
+
 void AudioFlinger::MmapThread::MmapTrack::appendDumpHeader(String8& result)
 {
     result.appendFormat("Client Session Port Id  Format Chn mask  SRate Flags %s\n",
diff --git a/services/oboeservice/AAudioServiceStreamBase.cpp b/services/oboeservice/AAudioServiceStreamBase.cpp
index 9f48f80..d395c25 100644
--- a/services/oboeservice/AAudioServiceStreamBase.cpp
+++ b/services/oboeservice/AAudioServiceStreamBase.cpp
@@ -278,7 +278,7 @@
     if (result != AAUDIO_OK) goto error;
 
     // This should happen at the end of the start.
-    sendServiceEvent(AAUDIO_SERVICE_EVENT_STARTED);
+    sendServiceEvent(AAUDIO_SERVICE_EVENT_STARTED, static_cast<int64_t>(mClientHandle));
     setState(AAUDIO_STREAM_STATE_STARTED);
 
     return result;