Java 中的 MIDI - 尝试从多个 CC 获取连续的控制器数据，但只能获取 1 个

Question

我有一个 Moog Theremini，它输出两组连续控制器数据。 “俯仰”天线在 CC 20 上输出，“音量”天线在 CC2 上输出。

我可以毫无问题地提取 CC20 的轨道数据，但在阅读了一天的 MIDI 文档和文章后，似乎找不到任何方法来获取同一轨道上的其他 CC 数据。有没有对此很熟悉的人来帮助我？

下面的输出代码是我想要弄清楚的。我的目的是

1. 将轨道（只有 1 个轨道）上的最后一条（或倒数第二条）消息转换为短消息
2. 打印命令、状态、控制器# 和控制器值
3. 这是在循环中完成的，因此它会无限期地继续打印曲目的最新部分。

下面的代码成功地实现了 CC 20 的上述目标，但我似乎不知道如何获取 CC 2 的数据。老实说，我什至不确定它为什么要打印 CC20。

  try {
            ShortMessage sm = (ShortMessage) sequencePass.getTracks()[0].get(sequencePass.getTracks()[0].size()-2).getMessage();
            System.out.println("| comm " + sm.getCommand() + "| status " + sm.getStatus()  + "| d1 (Controller#) " + sm.getData1() + "| d2 (Controller value) " + sm.getData2());
            


        } catch (Exception e) {
            System.out.println("blah blah" + e);
        }

**此处编辑 1 是 MIDI 类：**

public MidiJunk() {
        try {
            MidiDevice.Info[] infos = MidiSystem.getMidiDeviceInfo(); //looking through all of my MIDI devices
            for(int i=0;i<infos.length;i++)
            {
                System.out.println(infos[i].getName() + " - " + infos[i].getDescription());
            }
            System.out.println();

            MidiDevice INSTRUMENTO = MidiSystem.getMidiDevice(infos[5]); //the plugged in Theremini is here, so assigning it as a  MidiDevice
            INSTRUMENTO.open(); //opening midi device
            Sequencer sequencero = MidiSystem.getSequencer(); //default sequencer transmitter and receiver
            sequencero.open(); //open sequencer
            Transmitter transmittero = INSTRUMENTO.getTransmitter(); //linking transmitter to instrument?
            Receiver receivero = sequencero.getReceiver(); //get reciever from sequencer
            transmittero.setReceiver(receivero);
            Sequence testseq; //test sequence


            try {
                testseq = new Sequence(Sequence.PPQ,24);
                sequencero.setSequence(testseq);
                sequencero.recordEnable(testseq.createTrack(),0);
                sequencero.setTickPosition(0);
                sequencero.startRecording();
                Timer timeo = new Timer();
                TimerTask timeoTaskeo = new displayMidiEventsOnTimer(testseq);
                timeo.schedule(timeoTaskeo,400,400);
                Scanno.nextLine();

                sequencero.stopRecording();
                MidiSystem.write(testseq,1,new File("miditest.mid"));
                System.out.println("it's done");

            } catch (Exception ene) {
                System.out.println(ene);
            }

        } catch (Exception E) {
            System.out.println(E);

        }
    }

这里是显示事件类

public class displayMidiEventsOnTimer extends TimerTask {
    Sequence sequencePass;

    public displayMidiEventsOnTimer(Sequence thisguy) {
        sequencePass = thisguy;
    }

    @Override
    public void run() {
        try {
            ShortMessage sm = (ShortMessage) sequencePass.getTracks()[0].get(sequencePass.getTracks()[0].size()-2).getMessage();
            System.out.println("| comm " + sm.getCommand() + "| status " + sm.getStatus()  + "| d1 (Controller#) " + sm.getData1() + "| d2 (Controller value) " + sm.getData2());

        } catch (Exception e) {
            System.out.println(e);
        }
    }

}

Answer 1

这里不需要定序器，除非您想记录接收到的事件之间的相对时间。

以下是如何直接在自定义接收器中显示所有传入 CC 消息的示例。

...
Transmitter transmittero = INSTRUMENTO.getTransmitter(); 
Receiver receivero = new MyReceiver();   // Connect to your custom receiver
transmittero.setReceiver(receivero);
...

class MyReceiver implements Receiver
{

    @Override
    public void send(MidiMessage mm, long timeStamp)
    {
        if (mm instanceof ShortMessage)
        {
            ShortMessage sm = (ShortMessage) mm;
            if (sm.getCommand() == ShortMessage.CONTROL_CHANGE)
            {
                int cc = sm.getData1();
                // Do something quick, filter ignored CCs etc.
                System.out.println("cc=" + cc);    
            }
        }
    }

    @Override
    public void close()
    {
    }

}