diff --git a/libraries/common/src/main/java/androidx/media3/common/ForwardingSimpleBasePlayer.java b/libraries/common/src/main/java/androidx/media3/common/ForwardingSimpleBasePlayer.java
index 7482218742..42b2fc137a 100644
--- a/libraries/common/src/main/java/androidx/media3/common/ForwardingSimpleBasePlayer.java
+++ b/libraries/common/src/main/java/androidx/media3/common/ForwardingSimpleBasePlayer.java
@@ -123,6 +123,7 @@ protected State getState() {
     if (player.isCommandAvailable(Player.COMMAND_GET_AUDIO_ATTRIBUTES)) {
       state.setAudioAttributes(player.getAudioAttributes());
     }
+    state.setAudioSessionId(player.getAudioSessionId());
     state.setAvailableCommands(player.getAvailableCommands());
     if (player.isCommandAvailable(Player.COMMAND_GET_CURRENT_MEDIA_ITEM)) {
       state.setContentBufferedPositionMs(positionSuppliers.contentBufferedPositionSupplier);
diff --git a/libraries/common/src/main/java/androidx/media3/common/SimpleBasePlayer.java b/libraries/common/src/main/java/androidx/media3/common/SimpleBasePlayer.java
index 070c4d908c..1ad8c8fa45 100644
--- a/libraries/common/src/main/java/androidx/media3/common/SimpleBasePlayer.java
+++ b/libraries/common/src/main/java/androidx/media3/common/SimpleBasePlayer.java
@@ -3817,6 +3817,11 @@ private void updateStateAndInformListeners(
           Player.EVENT_AUDIO_ATTRIBUTES_CHANGED,
           listener -> listener.onAudioAttributesChanged(newState.audioAttributes));
     }
+    if (previousState.audioSessionId != newState.audioSessionId) {
+      listeners.queueEvent(
+          Player.EVENT_AUDIO_SESSION_ID,
+          listener -> listener.onAudioSessionIdChanged(newState.audioSessionId));
+    }
     if (!previousState.videoSize.equals(newState.videoSize)) {
       listeners.queueEvent(
           Player.EVENT_VIDEO_SIZE_CHANGED,