Android SoundPool sound playback intermittent

Question

I have several GridView items that play a small .ogg file when they are selected. They are played using the SoundPool class, however this class seems very intermittent - sometimes the sound plays, sometimes it doesn't; there is no pattern to this so I am having trouble figuring out why it's doing it.

Here is my code:

public void playSelectionSound(){
        SoundPool sp = new SoundPool(1, AudioManager.STREAM_MUSIC, 0);
        int soundId = sp.load(this, R.raw.char_select, 1);
        sp.play(soundId, 1, 1, 0, 0, 1);
    }

Answer 1

I eventually resorted to switching to MediaPlayer instead of SoundPool:

MediaPlayer mp = MediaPlayer.create(this, R.raw.char_select); //open media player
        mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                mp.release();
            }
        });
        mp.start(); //play the sound

Works everytime.