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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.SubtractiveSynthVoice;
import com.jsyn.midi.MessageParser;
import com.jsyn.midi.MidiConstants;
import com.jsyn.unitgen.LineOut;
import com.jsyn.unitgen.PowerOfTwo;
import com.jsyn.unitgen.SineOscillator;
import com.jsyn.unitgen.UnitOscillator;
import com.jsyn.util.VoiceAllocator;
import com.softsynth.shared.time.TimeStamp;
/**
* 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 MAX_VOICES = 8;
private Synthesizer synth;
private VoiceAllocator allocator;
private LineOut lineOut;
private double vibratoRate = 5.0;
private double vibratoDepth = 0.0;
private UnitOscillator lfo;
private PowerOfTwo powerOfTwo;
private MessageParser messageParser;
private SubtractiveSynthVoice[] voices;
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();
messageParser.parse(bytes);
}
}
public int test() throws MidiUnavailableException, IOException, InterruptedException {
setupSynth();
messageParser = new MyParser();
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;
}
class MyParser extends MessageParser {
@Override
public void controlChange(int channel, int index, int value) {
// Mod Wheel
if (index == 1) {
vibratoDepth = 0.1 * value / 128.0;
// System.out.println( "vibratoDepth = " + vibratoDepth );
lfo.amplitude.set(vibratoDepth);
}
// 102 is the index of the first knob on my Axiom 25
else if (index == 102) {
final double bump = 0.95;
if (value < 64) {
vibratoRate *= bump;
} else {
vibratoRate *= 1.0 / bump;
}
System.out.println("vibratoRate = " + vibratoRate);
lfo.frequency.set(vibratoRate);
}
}
@Override
public void noteOff(int channel, int noteNumber, int velocity) {
allocator.noteOff(noteNumber, synth.createTimeStamp());
}
@Override
public void noteOn(int channel, int noteNumber, int velocity) {
double frequency = convertPitchToFrequency(noteNumber);
double amplitude = velocity / (4 * 128.0);
TimeStamp timeStamp = synth.createTimeStamp();
allocator.noteOn(noteNumber, frequency, amplitude, timeStamp);
}
@Override
public void pitchBend(int channel, int bend) {
double fraction = (bend - MidiConstants.PITCH_BEND_CENTER)
/ ((double) MidiConstants.PITCH_BEND_CENTER);
System.out.println("bend = " + bend + ", fraction = " + fraction);
}
}
/**
* Calculate frequency in Hertz based on MIDI pitch. Middle C is 60.0. You can use fractional
* pitches so 60.5 would give you a pitch half way between C and C#.
*/
double convertPitchToFrequency(double pitch) {
final double concertA = 440.0;
return concertA * Math.pow(2.0, ((pitch - 69) * (1.0 / 12.0)));
}
private void setupSynth() {
synth = JSyn.createSynthesizer();
// Add an output.
synth.add(lineOut = new LineOut());
synth.add(powerOfTwo = new PowerOfTwo());
synth.add(lfo = new SineOscillator());
// Sums pitch modulation.
lfo.output.connect(powerOfTwo.input);
lfo.amplitude.set(vibratoDepth);
lfo.frequency.set(vibratoRate);
voices = new SubtractiveSynthVoice[MAX_VOICES];
for (int i = 0; i < MAX_VOICES; i++) {
SubtractiveSynthVoice voice = new SubtractiveSynthVoice();
synth.add(voice);
powerOfTwo.output.connect(voice.pitchModulation);
voice.getOutput().connect(0, lineOut.input, 0);
voice.getOutput().connect(0, lineOut.input, 1);
voices[i] = voice;
}
allocator = new VoiceAllocator(voices);
// Start synthesizer using default stereo output at 44100 Hz.
synth.start();
// We only need to start the LineOut. It will pull data from the
// oscillator.
lineOut.start();
// Get synthesizer time in seconds.
double timeNow = synth.getCurrentTime();
// Advance to a near future time so we have a clean start.
double time = timeNow + 0.5;
}
}
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