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/*
* Copyright 2009 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.SawtoothOscillatorBL;
import com.jsyn.unitgen.UnitOscillator;
/**
* Use time stamps to change the frequency of an oscillator at precise times.
*
* @author Phil Burk (C) 2009 Mobileer Inc
*/
public class PlaySequence {
Synthesizer synth;
UnitOscillator osc;
LineOut lineOut;
private void test() {
// Create a context for the synthesizer.
synth = JSyn.createSynthesizer();
// Add a tone generator.
synth.add(osc = new SawtoothOscillatorBL());
// Add an output mixer.
synth.add(lineOut = new LineOut());
// Connect the oscillator to the left and right audio output.
osc.output.connect(0, lineOut.input, 0);
osc.output.connect(0, lineOut.input, 1);
// 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;
double freq = 400.0; // hertz
osc.frequency.set(freq, time);
// Schedule this to happen a bit later.
time += 0.5;
freq *= 1.5; // up a perfect fifth
osc.frequency.set(freq, time);
time += 0.5;
freq *= 4.0 / 5.0; // down a major third
osc.frequency.set(freq, time);
// Sleep while the sound is being generated in the background thread.
try {
synth.sleepUntil(time + 0.5);
} catch (InterruptedException e) {
e.printStackTrace();
}
// Stop everything.
synth.stop();
}
public static void main(String[] args) {
new PlaySequence().test();
}
}
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