如何在Java中實現Midi合成器

我實現什麼（代表一個或多個儀器合成器=新的設備）是javax.sound.midi.Receiver中：

package at.bachmann.se.midi.smc; 

import javax.sound.midi.MetaMessage; 
import javax.sound.midi.MidiEvent; 
import javax.sound.midi.MidiMessage; 
import javax.sound.midi.Receiver; 
import javax.sound.midi.ShortMessage; 
import javax.sound.midi.SysexMessage; 

public class SmcReceiver implements Receiver { 

    public static final int NOTE_ON = 0x90; 
    public static final int NOTE_OFF = 0x80; 
    public static final String[] NOTE_NAMES = {"C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"}; 

    @Override 
    public void close() { 
     System.out.println(); 
    } 

    @Override 
    public void send(MidiMessage message, long timeStamp) { 
     if(message instanceof ShortMessage) { 
      ShortMessage sMessage = (ShortMessage) message; 
      System.out.print("Channel: " + sMessage.getChannel() + " "); 
      int cmd = sMessage.getCommand(); 
      int key = sMessage.getData1(); 
      int octave = (key/12)-1; 
      int note = key % 12; 
      String noteName = NOTE_NAMES[note]; 
      int velocity = sMessage.getData2(); 
      switch(cmd) { 
       case NOTE_ON: 
        System.out.println("Note on, " + noteName + octave + " key=" + key + " velocity: " + velocity); 
        break; 
       case NOTE_OFF: 
        System.out.println("Note off, " + noteName + octave + " key=" + key + " velocity: " + velocity); 
        break; 
      } 
     } else if(message instanceof MetaMessage) { 
      ;//TODO 
     } else if(message instanceof SysexMessage) { 
      ;//TODO 
     } 
    } 

}

這是你如何播放MIDI文件，默認值：

public class MidiPlayerTest { 
    @Test 
    public void playMidiTst() throws InvalidMidiDataException, IOException, MidiUnavailableException { 
     Sequencer sequencer = MidiSystem.getSequencer(); 

     System.out.println(sequencer.getClass().getName()); 

     sequencer.open(); 

     sequencer.setSequence(MidiSystem.getSequence(new File("tst.midi"))); 


     sequencer.start(); 

     while(true) { 
      if(sequencer.isRunning()) { 
       try { 
        Thread.sleep(200); // Check every second 
       } catch(InterruptedException ignore) { 
        break; 
       } 
      } else { 
       break; 
      } 
     } 
     System.out.println("DONE!"); 
    } 
}

所以我的問題是我如何告訴序列發生器使用我的接收器？

事情，我試圖/發現：

我發現沒有辦法告訴用我的接收機的音序器。
我發現Receiver被javax.sound.midi.Synthesizer使用，但是在那裏我找不到將自定義合成器類附加到Sequencer的方法。

來源

2017-10-06 maxbit89

尋找你的代碼（不是API）的外觀就像Receiver是一個播放器一樣，你可以嘗試實現Sequence。 –

嗯，我想你是指Sequencer？是的，我可以實現一個音序器，但然後我將不得不做我自己所有醜陋的時間計算：S ... – maxbit89

不，我的意思是 https://docs.oracle.com/javase/7/docs/api/ javax/sound/midi/Sequence.html –

我的一個朋友給我發的文件我找不到：S： https://docs.oracle.com/javase/tutorial/sound/MIDI-messages.html

因此，這裏的工作代碼：

public class MidiPlayerTest { 
    @Test 
    public void playMidiTst() throws InvalidMidiDataException, IOException, MidiUnavailableException { 
     Sequencer sequencer = MidiSystem.getSequencer(); 

     Transmitter transmitter = sequencer.getTransmitter(); 
     transmitter.setReceiver(new SmcReceiver()); 
     System.out.println(sequencer.getClass().getName()); 

     sequencer.open(); 

     sequencer.setSequence(MidiSystem.getSequence(new File("tst.midi"))); 


     sequencer.start(); 

     while(true) { 
      if(sequencer.isRunning()) { 
       try { 
        Thread.sleep(200); // Check every second 
       } catch(InterruptedException ignore) { 
        break; 
       } 
      } else { 
       break; 
      } 
     } 
     System.out.println("DONE!"); 
    } 
}

來源

2017-10-06 16:58:20 maxbit89

如何在Java中實現Midi合成器

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