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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 com.jsyn.JSyn;
import com.jsyn.Synthesizer;
import com.jsyn.unitgen.LineOut;
import com.jsyn.unitgen.LinearRamp;
import com.jsyn.unitgen.Multiply;
import com.jsyn.unitgen.SineOscillator;
import com.jsyn.unitgen.UnitOscillator;
/**
* Play a enharmonic sine tones using JSyn oscillators.
*
* @author Phil Burk (C) 2010 Mobileer Inc
*/
public class PlayPartials {
private Synthesizer synth;
private UnitOscillator[] osc;
private Multiply[] multipliers;
private LinearRamp ramp;
private LineOut lineOut;
private double[] amps = {
0.2, 0.1, 0.3, 0.4
};
private double[] ratios = {
1.0, Math.sqrt(2.0), Math.E, Math.PI
};
private void test() {
// Create a context for the synthesizer.
synth = JSyn.createSynthesizer();
// Start synthesizer using default stereo output at 44100 Hz.
synth.start();
// Add a stereo audio output unit.
synth.add(lineOut = new LineOut());
synth.add(ramp = new LinearRamp());
// Add a tone generator.
osc = new SineOscillator[amps.length];
multipliers = new Multiply[ratios.length];
for (int i = 0; i < osc.length; i++) {
// Create unit generators and store them in arrays.
synth.add(osc[i] = new SineOscillator());
synth.add(multipliers[i] = new Multiply());
// Connect each oscillator to both channels of the output.
// They will be mixed automatically.
osc[i].output.connect(0, lineOut.input, 0);
osc[i].output.connect(0, lineOut.input, 1);
// Use a multiplier to scale the output of the ramp.
// output = inputA * inputB
ramp.output.connect(multipliers[i].inputA);
multipliers[i].output.connect(osc[i].frequency);
multipliers[i].inputB.set(ratios[i]);
osc[i].amplitude.set(amps[i]);
}
// start ramping up
ramp.current.set(100.0);
ramp.time.set(3.0);
ramp.input.set(700.0);
// We only need to start the LineOut. It will pull data from the
// oscillator.
lineOut.start();
System.out.println("You should now be hearing a sine wave. ---------");
// Sleep while the sound is generated in the background.
try {
// Sleep for a few seconds.
synth.sleepFor(4.0);
// ramp down
ramp.input.set(100.0);
synth.sleepFor(4.0);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("Stop playing. -------------------");
// Stop everything.
synth.stop();
}
public static void main(String[] args) {
System.out.println("Java version = " + System.getProperty("java.version"));
new PlayPartials().test();
}
}
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