public void play() {
        //Log.d(TAG, "play");
        if(isInitialized()) {
            mAudioTrack.play();
            mAudioThread.setPaused(false);
        } else {
            throw new IllegalStateException();
        }
    }
Can be used to set an audio session ID before calling {@link #init(android.media.MediaFormat)}.
MediaPlayer/src/main/java/net/protyposis/android/mediaplayer/AudioPlayback.java