PLATFORM_API_MacOSX_MidiOut.c：162->无效消息：

Question

大家好，我一直在研究javax.sound.midi Api，遇到了我认为与库本身无关但与Mac有关的问题。好吧，我有这个简单的代码来发送Timing Clock Midi消息。并收到此红色消息“ PLATFORM_API_MacOSX_MidiOut.c：162->无效消息：发送短消息时消息状态= 0xF8”。有人知道解决此问题吗？预先感谢

我查看了此源代码https://github.com/JetBrains/jdk8u_jdk/blob/master/src/macosx/native/com/sun/media/sound/PLATFORM_API_MacOSX_MidiOut.c 而且看来midi消息的范围有些受限制。

公共类TestMidiLibrary {

public static void main(String[] args) {
    MidiDevice.Info[] info = MidiSystem.getMidiDeviceInfo();
    MidiDevice device = null;
    try {
        device = MidiSystem.getMidiDevice(info[6]);
        device.open();
    } catch (MidiUnavailableException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    ShortMessage msg = new ShortMessage();
    try {
        msg.setMessage(ShortMessage.TIMING_CLOCK);
        long timeStamp = -1;
        Receiver r = device.getReceiver();
        r.send(msg,timeStamp);
    } catch (InvalidMidiDataException | MidiUnavailableException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

}