private void testMaxNumChannels() {
        final int MAX_NUM_CHANNELS = 64;
        for (int i = 0; i < MAX_NUM_CHANNELS + 1; i++) {
            AudioNode audio = createAudioNode("Sound/Effects/Gun.wav", AudioData.DataType.Buffer);
            audio.setVolume(0.1f);
            audio.playInstance();
        }
    }
WARNING: No channel available to play instance of AudioNode[status=Stopped, vol=0.1]
jme3-examples/src/main/java/jme3test/audio/TestWav.java