Ребят, подскажите, почему не воспроизводится звук Java midi

 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); 
			track.add(noteOn); 
			 
			ShortMessage b = new ShortMessage(); 
			b.setMessage(128, 1, 44, 100); 
			MidiEvent noteOff = new MidiEvent(b, 16); 
			track.add(noteOff); 
			 
			 
			 
		} catch (Exception ex) { 
			ex.printStackTrace(); 
			 
		} 
	} 
	 
	 
}