Home Play three or more short sounds in exact time SoundPool(piano chord)
Reply: 1

Play three or more short sounds in exact time SoundPool(piano chord)

Wrobel
1#
Wrobel Published in 2017-12-05 10:46:44Z

I have a problem, I want to start sound in the same time.

I play 3-5 short sound in loop (piano sounds), and I have delay on first 1ms, on second 17ms, and so on, up to 60-90ms on last sound.

I am using SoundPool.

Anyone have a problem like this or had used library which can solve this problem (start multiple short sounds in sync)?

Below is example test sample (I use RxJava but I have tested it with and without RxJava):

   Observable.timer(150, TimeUnit.MILLISECONDS, Schedulers.single())
            .repeat()
            .subscribe(aLong -> {
                for (int soundId = 55; i < 60; i++) {
                    soundPool.play(soundId , 1f, 1f, 1, 0, 1);
                }
            });
Rainmaker
2#
Rainmaker Reply to 2017-12-12 18:48:11Z

It seems like you need to implement listener (OnLoadCompleteListener). SoundPool loads audio files asynchronously as it is stated in the docs so I believe this is why you get your delay.

Found this working example for 3 sounds here

public class SoundManager {

    public static int SOUNDPOOLSND_MENU_BTN         = 0;
    public static int SOUNDPOOLSND_WIN              = 1;
    public static int SOUNDPOOLSND_LOOSE            = 2;
    public static int SOUNDPOOLSND_DRAW             = 3;
    public static int SOUNDPOOLSND_TICK1            = 4;
    public static int SOUNDPOOLSND_TICK2            = 5;
    public static int SOUNDPOOLSND_OUT_OF_TIME      = 6;
    public static int SOUNDPOOLSND_HISCORE          = 7;
    public static int SOUNDPOOLSND_CORRECT_LETTER   = 8;

    public static boolean isSoundTurnedOff;

    private static SoundManager mSoundManager;

    private SoundPool mSoundPool; 
    private SparseArray <Integer> mSoundPoolMap; 
    private AudioManager  mAudioManager;

    public static final int maxSounds = 4;

    public static SoundManager getInstance(Context context)
    {
        if (mSoundManager == null){
            mSoundManager = new SoundManager(context);
        }

        return mSoundManager;
   }

    public SoundManager(Context mContext)
    {
        mAudioManager = (AudioManager)mContext.getSystemService(Context.AUDIO_SERVICE);
        mSoundPool = new SoundPool(maxSounds, AudioManager.STREAM_MUSIC, 0);

      mSoundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
          public void onLoadComplete(SoundPool soundPool, int sampleId,int status) {
            loaded = true;
            }
        });

        mSoundPoolMap = new SparseArray<Integer>(); 
        mSoundPoolMap.put(SOUNDPOOLSND_MENU_BTN, mSoundPool.load(mContext, R.raw.menubutton, 1));
        mSoundPoolMap.put(SOUNDPOOLSND_WIN, mSoundPool.load(mContext, R.raw.win, 1));
        mSoundPoolMap.put(SOUNDPOOLSND_LOOSE, mSoundPool.load(mContext, R.raw.lose, 1));
        mSoundPoolMap.put(SOUNDPOOLSND_TICK1, mSoundPool.load(mContext, R.raw.tick_0, 1));
        mSoundPoolMap.put(SOUNDPOOLSND_TICK2, mSoundPool.load(mContext, R.raw.tick_1, 1));
        mSoundPoolMap.put(SOUNDPOOLSND_OUT_OF_TIME, mSoundPool.load(mContext, R.raw.out_of_time, 1));
        mSoundPoolMap.put(SOUNDPOOLSND_HISCORE, mSoundPool.load(mContext, R.raw.personal_highscore, 1));
        mSoundPoolMap.put(SOUNDPOOLSND_CORRECT_LETTER, mSoundPool.load(mContext, R.raw.correct_letter, 1));

        // testing simultaneous playing
        int streamVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC); 
        mSoundPool.play(mSoundPoolMap.get(0), streamVolume, streamVolume, 1, 20, 1f); 
        mSoundPool.play(mSoundPoolMap.get(1), streamVolume, streamVolume, 1, 2, 1f);
        mSoundPool.play(mSoundPoolMap.get(2), streamVolume, streamVolume, 1, 0, 1f);


    } 

    public void playSound(int index) { 
        if (isSoundTurnedOff)
            return;

         int streamVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC); 
         mSoundPool.play(mSoundPoolMap.get(index), streamVolume, streamVolume, 1, 0, 1f); 
    }

    public static void clear()
    {
        if (mSoundManager != null){
            mSoundManager.mSoundPool = null; 
            mSoundManager.mAudioManager = null;
            mSoundManager.mSoundPoolMap = null;
        }
        mSoundManager = null;
    }
}
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