[android-developers] What is the correct way to pause AudioTrack?

I wrote the following code to experiment with the AudioTrack class but
whenever I click the pause button it seems to "REWIND" the track
rather than pause it, am I doing something wrong?
private class PlayAudio extends AsyncTask<Void, Void, Void> implements
OnPlaybackPositionUpdateListener {
AudioTrack audioTrack;
boolean keepGoing = true;

boolean speed = false;

@Override
protected Void doInBackground(Void... params) {
int bufferSize = AudioTrack.getMinBufferSize(frequency,
channelConfiguration, audioEncoding);

audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, frequency,
channelConfiguration, audioEncoding, bufferSize,
AudioTrack.MODE_STREAM);

audiodata = fillBuff(myAudio);

audioTrack.setPlaybackPositionUpdateListener(this);

audioTrack.play();

// This while block ensures that a buffer is continuously
replenished.
while (keepGoing) {
audioTrack.write(audiodata, 0, audiodata.length);
}

return null;
}

@Override
public void onMarkerReached(AudioTrack track) {

}

@Override
public void onPeriodicNotification(AudioTrack track) {

}

protected void onPostExecute(Void result) {
}

}

public void onClick(View v) {
int id = v.getId();
if (id == R.id.PausePlaybackButton) {
// playTask.maKorin = false;

playTask.audioTrack.pause();
}

//...

}

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