Java Midi:如何更改序列中单个音符的平移？

import javax.sound.midi.*;

public class MidiTransposition {
    public static void main(String[] args) {
        try {
            // 加载MIDI文件并创建Sequence对象
            Sequence sequence = MidiSystem.getSequence(new File("input.mid"));

            // 获取所有音轨
            Track[] tracks = sequence.getTracks();

            // 遍历音轨
            for (Track track : tracks) {
                // 遍历音符
                for (int i = 0; i < track.size(); i++) {
                    MidiEvent event = track.get(i);
                    MidiMessage message = event.getMessage();

                    // 检查是否为音符消息
                    if (message instanceof ShortMessage) {
                        ShortMessage note = (ShortMessage) message;

                        // 检查音符类型是否为Note On或Note Off
                        if (note.getCommand() == ShortMessage.NOTE_ON || note.getCommand() == ShortMessage.NOTE_OFF) {
                            // 获取音符的数据字节
                            int pitch = note.getData1();

                            // 修改音符的数据字节，例如增加半音
                            pitch += 1;

                            // 设置修改后的数据字节回音符
                            note.setMessage(note.getCommand(), note.getChannel(), pitch, note.getData2());
                        }
                    }
                }
            }

            // 保存修改后的音轨为新的Sequence对象
            Sequence newSequence = new Sequence(sequence.getDivisionType(), sequence.getResolution());
            Track newTrack = newSequence.createTrack();

            for (Track track : tracks) {
                for (int i = 0; i < track.size(); i++) {
                    newTrack.add(track.get(i));
                }
            }

            // 将新的Sequence对象保存为MIDI文件
            MidiSystem.write(newSequence, 1, new File("output.mid"));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}