SynthesizerTest1.java

import javax.sound.midi.MidiSystem;
import javax.sound.midi.Synthesizer;
import javax.sound.midi.MidiChannel;

public class SynthesizerTest1 {

 public static void main(String[] args) {

  int channel = 0; // 0 is a piano, 9 is percussion, other channels are for other instruments

  int volume = 80; // between 0 et 127
  int duration = 200; // in milliseconds

  try {
   Synthesizer synth = MidiSystem.getSynthesizer();
   synth.open();
   MidiChannel[] channels = synth.getChannels();

   // --------------------------------------
   // Play a few notes.
   // The two arguments to the noteOn() method are:
   // "MIDI note number" (pitch of the note),
   // and "velocity" (i.e., volume, or intensity).
   // Each of these arguments is between 0 and 127.
   channels[channel].noteOn(60, volume); // C note
   Thread.sleep(duration);
   channels[channel].noteOff(60);
   channels[channel].noteOn(62, volume); // D note
   Thread.sleep(duration);
   channels[channel].noteOff(62);
   channels[channel].noteOn(64, volume); // E note
   Thread.sleep(duration);
   channels[channel].noteOff(64);

   Thread.sleep(500);

   // --------------------------------------
   // Play a C major chord.
   channels[channel].noteOn(60, volume); // C
   channels[channel].noteOn(64, volume); // E
   channels[channel].noteOn(67, volume); // G
   Thread.sleep(3000);
   channels[channel].allNotesOff();
   Thread.sleep(500);



   synth.close();
  } catch (Exception e) {
   e.printStackTrace();
  }
 }

}