ShowWaves.java

package com.jsyn.examples;

import java.awt.BorderLayout;
import java.util.ArrayList;

import javax.swing.JApplet;
import javax.swing.JLabel;

import com.jsyn.JSyn;
import com.jsyn.Synthesizer;
import com.jsyn.scope.AudioScope;
import com.jsyn.swing.JAppletFrame;
import com.jsyn.unitgen.Add;
import com.jsyn.unitgen.LineOut;
import com.jsyn.unitgen.SawtoothOscillatorBL;
import com.jsyn.unitgen.SineOscillator;
import com.jsyn.unitgen.TriangleOscillator;
import com.jsyn.unitgen.UnitOscillator;


/**
 * Display waveforms using the AudioScope.
 * The frequency of the oscillators is modulated by an LFO.
 * @author  Phil Burk (C) 2010 Mobileer Inc
 *
 */
public class ShowWaves extends JApplet
{
	private static final long serialVersionUID = -8315903842197137926L;
	private Synthesizer synth;
	private UnitOscillator lfo;
	private Add adder;
	private ArrayList<UnitOscillator> oscillators = new ArrayList<UnitOscillator>();
	private LineOut lineOut;
	private AudioScope scope;

	/* Can be run as either an application or as an applet. */
	public static void main( String args[] )
	{
		ShowWaves applet = new ShowWaves();
		JAppletFrame frame = new JAppletFrame( "ShowWaves", applet );
		frame.setSize( 640, 300 );
		frame.setVisible( true );
		frame.test();
	}

	private void setupGUI()
	{
		setLayout( new BorderLayout() );

		add( BorderLayout.NORTH, new JLabel("ShowWaves in an AudioScope Mod001") );
		
		scope = new AudioScope(synth);
		for( UnitOscillator osc : oscillators)
		{
			scope.addProbe( osc.output );
		}
		scope.setTriggerMode( AudioScope.TriggerMode.NORMAL );
		scope.start();
		
		// Turn on the gain and trigger control GUI.
		scope.getView().setControlsVisible(true);
		add( BorderLayout.CENTER, scope.getView() );
		validate();	
	}
	
	public void start()
	{
		synth = JSyn.createSynthesizer();
		
		// Add an LFO.
		synth.add( lfo = new SineOscillator() );
		synth.add( adder = new Add() );
		
		// Add an output so we can hear the oscillators.
		synth.add( lineOut = new LineOut() );
		
		lfo.frequency.set( 0.1 );
		lfo.amplitude.set( 200.0 );
		adder.inputB.set( 400.0 );
		lfo.output.connect(  adder.inputA );
		
		oscillators.add( new SawtoothOscillatorBL() );
		oscillators.add( new SineOscillator() );
		oscillators.add( new TriangleOscillator() );
		for( UnitOscillator osc : oscillators)
		{
			synth.add( osc);
			adder.output.connect(  osc.frequency );
			osc.output.connect( 0, lineOut.input, 0 );
			osc.amplitude.set(  0.2  );
		}
		
		// Start synthesizer using default stereo output at 44100 Hz.
		synth.start();
		// Start lineOut so it can pull data from other units.
		lineOut.start();
		setupGUI();
		
		// We only need to start the LineOut. It will pull data from the
		// oscillator.
		lineOut.start();
		
	}

	public void stop()
	{
		scope.stop();
		synth.stop();
	}

}