java - 如何在Java MIDI程序中更改乐器

Question

如何更改 Midi 中的乐器？我可以将 channel 的值更改为最多 9，之后它会显示“ channel 超出范围”，这都是钢琴。例如，我怎样才能将其更改为吉他

  public noteplay()
  throws InvalidMidiDataException,MidiUnavailableException
  {
    bpm =80;
    beatLength = 1;
    theTimeMelody = 0;
    theTimeBass =0;
    seq = new Sequence(Sequence.PPQ,3);
    trkBass = seq.createTrack();
    trkMelody = seq.createTrack();
  }
  public void melody(int volume)
    throws InvalidMidiDataException,MidiUnavailableException

  {

   int list1[] = { 56,59,60,63,56,59,60,63, 61,64,65,68,61,64,65,68,    56,59,60,63,56,59,60,63,    63,66,67,70,73,66,67,70,};

    for (int pitch : list1)
      {
    ShortMessage onMsg = new ShortMessage();
    onMsg.setMessage(ShortMessage.NOTE_ON, 0, pitch, 80);

    ShortMessage offMsg = new ShortMessage();
    offMsg.setMessage(ShortMessage.NOTE_OFF, 0, pitch, 90);

    trkBass.add(new MidiEvent(onMsg,theTimeBass));
    trkBass.add(new MidiEvent(offMsg,theTimeBass+beatLength));
    theTimeBass += beatLength;

      }
  } 
}

Answer 1

通用 MIDI 标准为鼓保留了第十个 channel 。

您可以将其他十五个 channel 用于旋律乐器。