package com.jsyn.examples;
import com.jsyn.JSyn;
import com.jsyn.Synthesizer;
import com.jsyn.instruments.SubtractiveSynthVoice;
import com.jsyn.unitgen.LineOut;
import com.jsyn.unitgen.UnitGenerator;
import com.jsyn.unitgen.UnitVoice;
import com.softsynth.shared.time.TimeStamp;
/**
* Play notes using timestamped noteOn and noteOff methods of the UnitVoice.
*
* @author Phil Burk (C) 2009 Mobileer Inc
*
*/
public class PlayNotes
{
Synthesizer synth;
UnitGenerator ugen;
UnitVoice voice;
LineOut lineOut;
private void test()
{
// Create a context for the synthesizer.
synth = JSyn.createSynthesizer();
// Set output latency to 123 msec because this is not an interactive app.
synth.getAudioDeviceManager().setSuggestedOutputLatency( 0.123 );
// Add a tone generator.
//synth.add( ugen = new SawtoothOscillator() );
//synth.add( ugen = new SineOscillator() );
synth.add( ugen = new SubtractiveSynthVoice() );
voice = (UnitVoice) ugen;
// Add an output mixer.
synth.add( lineOut = new LineOut() );
// Connect the oscillator to the left and right audio output.
voice.getOutput().connect( 0, lineOut.input, 0 );
voice.getOutput().connect( 0, lineOut.input, 1 );
// Start synthesizer using default stereo output at 44100 Hz.
synth.start();
// Get synthesizer time in seconds.
double timeNow = synth.getCurrentTime();
// Advance to a near future time so we have a clean start.
TimeStamp timeStamp = new TimeStamp(timeNow + 0.5);
// We only need to start the LineOut. It will pull data from the
// oscillator.
synth.startUnit( lineOut, timeStamp );
// Schedule a note on and off.
double freq = 400.0; // hertz
voice.noteOn( freq, 0.5, timeStamp );
voice.noteOff( timeStamp.makeRelative( 0.4 ) );
// Schedule this to happen a bit later.
timeStamp = timeStamp.makeRelative( 1.0 );
freq *= 1.5; // up a perfect fifth
voice.noteOn( freq, 0.5, timeStamp );
voice.noteOff( timeStamp.makeRelative( 0.4 ) );
timeStamp = timeStamp.makeRelative( 1.0 );
freq *= 4.0 / 5.0; // down a major third
voice.noteOn( freq, 0.5, timeStamp );
voice.noteOff( timeStamp.makeRelative( 0.4 ) );
// Sleep while the song is being generated in the background thread.
try
{
System.out.println("Sleep while synthesizing.");
synth.sleepUntil( timeStamp.getTime() + 2.0 );
System.out.println("Woke up...");
} catch( InterruptedException e )
{
e.printStackTrace();
}
// Stop everything.
synth.stop();
}
public static void main( String[] args )
{
new PlayNotes().test();
}
}