How to use

dispose

method

in

com.badlogic.gdx.audio.AudioDevice

@Override
public void pause () {
  device.dispose();
  recorder.dispose();
}

  @Override
  public void run () {
    final float frequency = 440;
    float increment = (float)(2 * Math.PI) * frequency / 44100; // angular increment for each sample
    float angle = 0;
    float samples[] = new float[1024];
    while (!stop) {
      for (int i = 0; i < samples.length; i += 2) {
        samples[i] = 0.5f * (float)Math.sin(angle);
        samples[i + 1] = 2 * samples[i];
        angle += increment;
      }
      device.writeSamples(samples, 0, samples.length);
    }
    device.dispose();
  }
});

  public void close()
  {
    if(ad != null) {
      System.out.println("DEVICE OUTPUT: closing...");
      ad.dispose();
      ad = null;
    }
  }
}