MiniMiniMusicPlayer - Head First Java, nao toca som!?

import javax.sound.midi.*;
public class MiniMiniMusicApp {
	public static void main(String[] args){
		MiniMiniMusicApp mini = new MiniMiniMusicApp();
		mini.play();
	}
	
	public void play(){
		try {
			Sequencer player = MidiSystem.getSequencer();
			player.open();
			
			Sequence seq = new Sequence(Sequence.PPQ, 4);
			
			Track track = seq.createTrack();
			
			ShortMessage a = new ShortMessage();
			a.setMessage(144, 1, 44, 100);
			MidiEvent noteOn = new MidiEvent(a, 1);
			
			ShortMessage b = new ShortMessage();
			b.setMessage(128, 1, 44, 100);
			MidiEvent noteOff = new MidiEvent(b, 16);
			
			player.setSequence(seq);
			player.start();
			Thread.sleep(1000 * 2);
			player.close();
			System.exit(0);
		} catch(Exception ex) {
			ex.printStackTrace();
		}
	}
}