使用java在MIDI中添加第32个音符

Question

我试图使用java创建一个MIDI文件，我努力使代码添加一个三十二分音符（在将它添加到序列并生成MIDI文件后，它是空的） 。谢谢你的帮助！

编辑：这里是代码（这个代码生成带有十六分音符的MIDI文件）

EDIT2：问题出在我的midi玩家身上。感谢@Maxim指出

Sequence s = null;

    try {
        s = new Sequence(Sequence.PPQ, 480);
    } catch (InvalidMidiDataException e) {
        e.printStackTrace();
    }

    Track t = s.createTrack();

    ShortMessage sm = new ShortMessage();

    //instru
    sm.setMessage(ShortMessage.PROGRAM_CHANGE, 0, 25, 0); //9 ==> is the channel 10.
    t.add(new MidiEvent(sm, 0));


    t.add(createNoteOnEvent(75, 0));
    t.add(createNoteOffEvent(75, 120));

    File outputFile = new File("C:\\test.mid");

    MidiSystem.write(s, 0, outputFile);


  private static MidiEvent createNoteOnEvent(int nKey, long lTick)
    {
    return createNoteEvent(ShortMessage.NOTE_ON,
        nKey,
        64,
        lTick);
}



private static MidiEvent createNoteOffEvent(int nKey, long lTick)
{
    return createNoteEvent(ShortMessage.NOTE_OFF,
        nKey,
        0,
        lTick);
}

private static MidiEvent createNoteEvent(int nCommand,
                                         int nKey,
                                         int nVelocity,
                                         long lTick)
{
    ShortMessage    message = new ShortMessage();
    try
    {
        message.setMessage(nCommand,
            0,  // always on channel 1
            nKey,
            nVelocity);
    }
    catch (InvalidMidiDataException e)
    {
        e.printStackTrace();
        System.exit(1);
    }
    MidiEvent   event = new MidiEvent(message,
        lTick);
    return event;
}