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();
}
}