diff --git a/dom/audiochannel/AudioChannelAgent.cpp b/dom/audiochannel/AudioChannelAgent.cpp
index a5d121bf0b1a..95f2f2d9710b 100644
--- a/dom/audiochannel/AudioChannelAgent.cpp
+++ b/dom/audiochannel/AudioChannelAgent.cpp
@@ -202,7 +202,8 @@ AudioChannelAgent::InitInternal(nsPIDOMWindowInner* aWindow,
 }
 
 NS_IMETHODIMP
-AudioChannelAgent::NotifyStartedPlaying(AudioPlaybackConfig* aConfig)
+AudioChannelAgent::NotifyStartedPlaying(AudioPlaybackConfig* aConfig,
+                                        bool aAudible)
 {
   if (NS_WARN_IF(!aConfig)) {
     return NS_ERROR_FAILURE;
@@ -214,7 +215,10 @@ AudioChannelAgent::NotifyStartedPlaying(AudioPlaybackConfig* aConfig)
     return NS_ERROR_FAILURE;
   }
 
-  service->RegisterAudioChannelAgent(this);
+  MOZ_ASSERT(AudioChannelService::AudibleState::eAudible == true &&
+             AudioChannelService::AudibleState::eNotAudible == false);
+  service->RegisterAudioChannelAgent(this,
+    static_cast<AudioChannelService::AudibleState>(aAudible));
 
   AudioPlaybackConfig config = service->GetMediaConfig(mWindow,
                                                        mAudioChannelType);
diff --git a/dom/audiochannel/AudioChannelService.cpp b/dom/audiochannel/AudioChannelService.cpp
index 4c53c087853f..7a06281bff2d 100644
--- a/dom/audiochannel/AudioChannelService.cpp
+++ b/dom/audiochannel/AudioChannelService.cpp
@@ -248,7 +248,8 @@ AudioChannelService::~AudioChannelService()
 }
 
 void
-AudioChannelService::RegisterAudioChannelAgent(AudioChannelAgent* aAgent)
+AudioChannelService::RegisterAudioChannelAgent(AudioChannelAgent* aAgent,
+                                               AudibleState aAudible)
 {
   MOZ_ASSERT(aAgent);
 
@@ -263,7 +264,7 @@ AudioChannelService::RegisterAudioChannelAgent(AudioChannelAgent* aAgent)
   // callback function of AudioChannelAgentOwner that means the agent might be
   // released in their callback.
   RefPtr<AudioChannelAgent> kungFuDeathGrip(aAgent);
-  winData->AppendAgent(aAgent);
+  winData->AppendAgent(aAgent, aAudible);
 
   MaybeSendStatusUpdate();
 }
@@ -1001,13 +1002,14 @@ AudioChannelService::IsAudioChannelMutedByDefault()
 }
 
 void
-AudioChannelService::AudioChannelWindow::AppendAgent(AudioChannelAgent* aAgent)
+AudioChannelService::AudioChannelWindow::AppendAgent(AudioChannelAgent* aAgent,
+                                                     AudibleState aAudible)
 {
   MOZ_ASSERT(aAgent);
 
   AppendAgentAndIncreaseAgentsNum(aAgent);
   AudioCapturedChanged(aAgent, AudioCaptureState::eCapturing);
-  // Audio-playback would be notified when the agent owner starts audible.
+  AudioAudibleChanged(aAgent, aAudible);
 }
 
 void
diff --git a/dom/audiochannel/AudioChannelService.h b/dom/audiochannel/AudioChannelService.h
index 87eb519d724d..3b4fd19f0293 100644
--- a/dom/audiochannel/AudioChannelService.h
+++ b/dom/audiochannel/AudioChannelService.h
@@ -93,7 +93,8 @@ public:
    * Any audio channel agent that starts playing should register itself to
    * this service, sharing the AudioChannel.
    */
-  void RegisterAudioChannelAgent(AudioChannelAgent* aAgent);
+  void RegisterAudioChannelAgent(AudioChannelAgent* aAgent,
+                                 AudibleState aAudible);
 
   /**
    * Any audio channel agent that stops playing should unregister itself to
@@ -244,7 +245,7 @@ private:
 
     void AudioAudibleChanged(AudioChannelAgent* aAgent, AudibleState aAudible);
 
-    void AppendAgent(AudioChannelAgent* aAgent);
+    void AppendAgent(AudioChannelAgent* aAgent, AudibleState aAudible);
     void RemoveAgent(AudioChannelAgent* aAgent);
 
     uint64_t mWindowID;
diff --git a/dom/audiochannel/nsIAudioChannelAgent.idl b/dom/audiochannel/nsIAudioChannelAgent.idl
index 5150c7c184b7..812e389d526e 100644
--- a/dom/audiochannel/nsIAudioChannelAgent.idl
+++ b/dom/audiochannel/nsIAudioChannelAgent.idl
@@ -163,7 +163,7 @@ interface nsIAudioChannelAgent : nsISupports
    * @param config
    *    It contains the playback related states (volume/mute/suspend)
    */
-  void notifyStartedPlaying(in AudioPlaybackConfig config);
+  void notifyStartedPlaying(in AudioPlaybackConfig config, in bool audible);
 
   /**
    * Notify the agent we no longer want to play.