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/*
* Copyright 2010 Phil Burk, Mobileer Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jsyn.examples;
import java.io.IOException;
import javax.sound.midi.MidiDevice;
import javax.sound.midi.MidiMessage;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Receiver;
import com.jsyn.JSyn;
import com.jsyn.Synthesizer;
import com.jsyn.devices.javasound.MidiDeviceTools;
import com.jsyn.instruments.DualOscillatorSynthVoice;
import com.jsyn.midi.MidiSynthesizer;
import com.jsyn.unitgen.LineOut;
import com.jsyn.util.MultiChannelSynthesizer;
import com.jsyn.util.VoiceDescription;
/**
* Connect a USB MIDI Keyboard to the internal MIDI Synthesizer using JavaSound.
*
* @author Phil Burk (C) 2010 Mobileer Inc
*/
public class UseMidiKeyboard {
private static final int NUM_CHANNELS = 16;
private static final int VOICES_PER_CHANNEL = 3;
private Synthesizer synth;
private LineOut lineOut;
private MidiSynthesizer midiSynthesizer;
private VoiceDescription voiceDescription;
private MultiChannelSynthesizer multiSynth;
public static void main(String[] args) {
UseMidiKeyboard app = new UseMidiKeyboard();
try {
app.test();
} catch (MidiUnavailableException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
// Write a Receiver to get the messages from a Transmitter.
class CustomReceiver implements Receiver {
@Override
public void close() {
System.out.print("Closed.");
}
@Override
public void send(MidiMessage message, long timeStamp) {
byte[] bytes = message.getMessage();
midiSynthesizer.onReceive(bytes, 0, bytes.length);
}
}
public int test() throws MidiUnavailableException, IOException, InterruptedException {
setupSynth();
int result = 2;
MidiDevice keyboard = MidiDeviceTools.findKeyboard();
Receiver receiver = new CustomReceiver();
// Just use default synthesizer.
if (keyboard != null) {
// If you forget to open them you will hear no sound.
keyboard.open();
// Put the receiver in the transmitter.
// This gives fairly low latency playing.
keyboard.getTransmitter().setReceiver(receiver);
System.out.println("Play MIDI keyboard: " + keyboard.getDeviceInfo().getDescription());
result = 0;
} else {
System.out.println("Could not find a keyboard.");
}
return result;
}
private void setupSynth() {
synth = JSyn.createSynthesizer();
voiceDescription = DualOscillatorSynthVoice.getVoiceDescription();
// voiceDescription = SubtractiveSynthVoice.getVoiceDescription();
multiSynth = new MultiChannelSynthesizer();
final int startChannel = 0;
multiSynth.setup(synth, startChannel, NUM_CHANNELS, VOICES_PER_CHANNEL, voiceDescription);
midiSynthesizer = new MidiSynthesizer(multiSynth);
// Create a LineOut for the entire synthesizer.
synth.add(lineOut = new LineOut());
multiSynth.getOutput().connect(0,lineOut.input, 0);
multiSynth.getOutput().connect(1,lineOut.input, 1);
// Start synthesizer using default stereo output at 44100 Hz.
synth.start();
lineOut.start();
}
}
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