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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.PassThrough;
import com.jsyn.unitgen.SineOscillator;
import com.jsyn.unitgen.SpectralFFT;
import com.jsyn.unitgen.SpectralIFFT;
import com.jsyn.unitgen.UnitOscillator;
/**
* Play a sine sweep through an FFT/IFFT pair.
*
* @author Phil Burk (C) 2010 Mobileer Inc
*/
public class FFTPassthrough {
private Synthesizer synth;
private PassThrough center;
private UnitOscillator osc;
private UnitOscillator lfo;
private SpectralFFT fft;
private SpectralIFFT ifft1;
private LineOut lineOut;
private SpectralIFFT ifft2;
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 tone generator.
synth.add(center = new PassThrough());
// synth.add( osc = new SawtoothOscillatorBL() );
synth.add(osc = new SineOscillator());
synth.add(lfo = new SineOscillator());
synth.add(fft = new SpectralFFT());
synth.add(ifft1 = new SpectralIFFT());
synth.add(ifft2 = new SpectralIFFT());
// Add a stereo audio output unit.
synth.add(lineOut = new LineOut());
// Connect the oscillator to both channels of the output.
center.output.connect(osc.frequency);
lfo.output.connect(osc.frequency);
osc.output.connect(fft.input);
fft.output.connect(ifft1.input);
fft.output.connect(ifft2.input);
ifft1.output.connect(0, lineOut.input, 0);
ifft2.output.connect(0, lineOut.input, 1);
// Set the frequency and amplitude for the modulated sine wave.
center.input.set(600.0);
lfo.frequency.set(0.2);
lfo.amplitude.set(400.0);
osc.amplitude.set(0.6);
// We only need to start the LineOut. It will pull data through the
// chain.
lineOut.start();
System.out.println("You should now be hearing a clean oscillator on the left channel,");
System.out.println("and the FFT->IFFT processed signal on the right channel.");
// Sleep while the sound is generated in the background.
try {
double time = synth.getCurrentTime();
// Sleep for a few seconds.
synth.sleepUntil(time + 20.0);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("Stop playing. -------------------");
// Stop everything.
synth.stop();
}
public static void main(String[] args) {
new FFTPassthrough().test();
}
}
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