public void go() {
setUpGui();
try {
Sequencer sequencer = MidiSystem.getSequencer();
sequencer.open();
// make a sequencer and open
sequencer.addControllerEventListener(m1, new int[] {127});
Sequence seq = new Sequence(Sequence.PPQ, 4);
Track track = seq.createTrack();
int r = 0;
for (int i = 0; i < 300; i += 4) {
r = (int) ((Math.random() * 50) + 1);
track.add(makeEvent(144, 1, r, 100, i));
track.add(makeEvent(176, 1, 127, 0, i));
track.add(makeEvent(128, 1, r, 100, i + 2));
} // end loop
sequencer.setSequence(seq);
sequencer.start();
sequencer.setTempoInBPM(120);
} catch (Exception ex) {
ex.printStackTrace();
}
} // close method
/**
* Plays a sequence, optionally looping. This method returns immediately. The sequence is not
* played if it is invalid.
*
* @param sequence
* @param loop
*/
public void play(Sequence sequence, boolean loop) {
if (sequencer != null && sequence != null && sequencer.isOpen()) {
try {
sequencer.setSequence(sequence);
sequencer.start();
this.loop = loop;
} catch (InvalidMidiDataException ex) {
ex.printStackTrace();
}
}
}
public void go() {
try {
sq.open();
Sequence seq = new Sequence(Sequence.PPQ, 4);
Track track = seq.createTrack();
track.add(addNote(144, 9, 56, 100, 1));
track.add(addNote(128, 9, 56, 100, 4));
sq.setSequence(seq);
sq.setTempoInBPM(tempo);
sq.setLoopCount(Sequencer.LOOP_CONTINUOUSLY);
sq.start();
} catch (Exception ex) {
ex.printStackTrace();
}
}
/** Gets the default transmitter and receiver, and then links them. */
private void linkTransmitterToReceiver() {
try {
// Set up the sequencer (including its tempo)
sequencer.open();
sequencer.setSequence(sequence);
sequencer.setTempoInBPM(song.getBPM());
// Get the system's default synthesizer and set that up, too.
Synthesizer synth = MidiSystem.getSynthesizer();
synth.open();
// Get the receiver and transmitter to use and set those up.
Receiver receiver = synth.getReceiver();
Transmitter transmitter = sequencer.getTransmitter();
transmitter.setReceiver(receiver);
} catch (Exception ex) {
// Something went wrong.
ex.printStackTrace();
System.exit(1);
}
}
public boolean play() {
try {
if (playState != STOPPED) playStop();
if (sequence == null) return false;
if (sequencer == null) return false;
sequencer.open();
sequencer.setSequence(sequence);
double playStartTime = (player.getSeekTime() / 100) * (playGetLength());
sequencer.setMicrosecondPosition((long) playStartTime);
sequencer.start();
playState = PLAYING;
return true;
} catch (Exception ex) {
ex.printStackTrace();
playState = STOPPED;
return false;
}
}
