Cannot change audio volume on Oculus Quest 2

[massimo-bortolamei-hegias]

Describe the bug
Pressing the hardware volume buttons on the quest, when the audiovideo has started, does not change volume of the call, and also does not show quest's UI for volume control anymore.

It is my understanding that when audiovideo starts, the mode gets changed to MODE_IN_COMMUNICATION, but the quest apparently directs everything towards STREAM_MUSIC.

With the following script I was able to catch the volume change triggered by hardware button, and verify that it happens in STREAM_VOICE_CALL. I then tried to replicate such change into STREAM_MUSIC as well.

public class AndroidNativeVolumeService : MonoBehaviour
{
    AndroidJavaObject volumeSync;
    void Start()
    {
        AndroidJavaClass app = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        var activity = app.GetStatic<AndroidJavaObject>("currentActivity");
        volumeSync = new AndroidJavaObject("com.hegias.socketio.VolumeSync", activity);
        volumeSync.Call("Enable", true);
    }

    void OnDestroy()
    {
        volumeSync.Call("Enable", false);
    }
}

public class VolumeSync {
    private android.database.ContentObserver observer;
    Activity activity;

    public VolumeSync(Activity activity) {
        this.activity = activity;
    }

    public void Enable(boolean on) {
        if (on) {
            if (observer == null) {
                observer = new ContentObserver(activity.getApplicationContext(), new android.os.Handler());
                activity.getApplicationContext().getContentResolver().registerContentObserver(android.provider.Settings.System.CONTENT_URI, true, observer);
            }
        } else {            
            if (observer != null) {
                activity.getApplicationContext().getContentResolver().unregisterContentObserver(observer);
                observer = null;
            }
        }
    }

    class ContentObserver extends android.database.ContentObserver {
        private AudioManager audioManager;

        public ContentObserver(Context context, android.os.Handler handler) {
            super(handler);
            audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
        }

        @Override
        public boolean deliverSelfNotifications() {
            return false;
        }

        @Override
        public void onChange(boolean selfChange, android.net.Uri uri) {
			String voiceURL = "content://settings/system/volume_voice_speaker";
            if (uri.toString().equals(voiceURL)) {
                int v1 = audioManager.getStreamVolume(AudioManager.STREAM_VOICE_CALL);
                int v2 = v1 *  audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC) / audioManager.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL);
                audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, v2, 0);
            }
        }
    }
}

This works partially: I have background music, and with that script I can hear its volume going up and down, meaning that I'm effectively changing the volume of STREAM_MUSIC in accordance with the pression of the hardware volume button and the change of STREAM_VOICE_CALL.
Unfortunately, while the volume of my music goes down, the voice coming from other participants stays the same (too loud).

Am I missing something from the android sdk in order to correctly change the volume?
The sample apk works on android devices (smartphones) but I am using the chime-sdk-android as external java package into a Unity project build for Quest, so there might be some differences.
Photon had the same issue, and I'm actually following their solution very closely. But maybe with chime there is something different that I'm missing

Thanks

[zhinang-amazon]

Hi @massimo-bortolamei-hegias,

Thanks for reporting the issue, and it's interesting to see that you are bridging our Android SDK to Unity and building on Quest. We will take a look and get back to you.

[massimo-bortolamei-hegias]

Hello @zhinang-amazon , do you have any feedback on this issue? The custom solution that I got from Photon (and enhanced myself) is not working anymore since latest Oculus Quest software update :(

[massimo-bortolamei-hegias]

Hello @zhinang-amazon , I investigated quite a lot about what is happening and I believe I could solve the issue if I had access to the AudioTrack that is created by chime to stream the audio into.
Would it be possible to expose a reference to such AudioTrack through the API ? I believe I could then control its volume directly with setVolume and work around this problem.
Alternatively, if I could get access to the repo from which the amazon-chime-sdk-media is compiled, I could probably fork and do everything by myself.
Eventually I would be happy to share my changes in both SDK with the Chime Android Team, so that you could support even the Quest Platform without any additional effort.
I'm looking forward to your answer,
Thank you

[alnlau]

Hello,

We currently do not expose the AudioTrack. We'll consider exposing the audio as a feature request and update this when we have more information about this.

[linsang21]

Audio stream type is supported at the latest 0.16.0 release. Also you can check out the README for how to use it, here. Gonna close the issue, feel free to open new one if you needed.