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1 package SnowMailClient.Synthesizer;
2
3 import javax.sound.midi.ShortMessage  ;
4 import javax.sound.midi.Synthesizer ;
5 import javax.sound.midi.Receiver ;
6 import javax.sound.midi.MidiSystem ;
7 import javax.sound.midi.MidiUnavailableException ;
8 import javax.sound.midi.InvalidMidiDataException ;
9
10
12 public final class SynthesizerDemo {
13 private ShortMessage message = new ShortMessage ();
14 private Synthesizer synth;
15 private Receiver receiver;
16
17 public SynthesizerDemo() {
18 try {
19 synth = MidiSystem.getSynthesizer();
20 synth.open();
21 receiver = synth.getReceiver();
22 } catch (MidiUnavailableException e) {
23 e.printStackTrace();
24 }
25 }
26
27 public void playNote(int note, int duration) {
28 setShortMessage(ShortMessage.NOTE_ON, note);
29 receiver.send(message, -1);
30 try {
31 Thread.sleep(duration);
32 } catch (InterruptedException e) {
33 e.printStackTrace();
34 }
35 setShortMessage(ShortMessage.NOTE_OFF, note);
36 receiver.send(message, -1);
37 }
38
39 public void setInstrument(int instrument) {
40 synth.getChannels()[0].programChange(instrument);
41 }
42
43 private void setShortMessage(
44 int onOrOff, int note) {
45 try {
46 message.setMessage(onOrOff, 0, note, 70);
47 } catch (InvalidMidiDataException e) {
48 e.printStackTrace();
49 }
50 }
51
52 public void playOctave(int baseNote) {
53 for (int i = 0; i < 24; i+=2) {
54 playNote(baseNote + i, 50);
55 }
56 }
57
58 public static void main(String [] args) {
59 SynthesizerDemo synth = new SynthesizerDemo();
60 synth.setInstrument(53);
61 synth.playOctave(60);
63 }
64
65 } |
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