JAVA: Musica

package minimusicplayer1;
import javax.sound.midi.*;

public class MiniMusicPlayer1 {

    public static void main(String[] args) {
        try {
            Sequencer sequencer = MidiSystem.getSequencer();
            sequencer.open();

            Sequencer seq = (Sequencer) new Sequence(Sequence.PPQ,4);
            Track track;
           track = seq.createTrack();
            for (int i= 5; i< 61; i+=4){
                track.add(makeEvent(144,1,i,100,i));
                track.add(makeEvent(128,1,i,100,i+2));
            }
            sequencer.setSequence(seq);
            sequencer.setTempoInBPM(220);
            sequencer.start();
        }catch(Exception ex) {ex.printStackTrace();}

        }
    public static MidiEvent makeEvent(int comd, int chan, int one, int two, int tick){
        MidiEvent event = null;
                try{
                ShortMessage a = new ShorMessage();
                a.setMessage(comd, chan, one, two);
                event = new MidiEvent(a, tick);
    }
               catch(Exception e){ }
               return event;
    }
    }