import jm.audio.AudioObject;
import jm.audio.Instrument;
import jm.audio.io.SampleOut;
import jm.audio.synth.*;
/**
* A basic pulsewave waveform instrument implementation
* which has two tones a perfect fifth apart
*
* @author Andrew Brown
*/
public final class PulseFifthsInst extends Instrument {
//----------------------------------------------
// Attributes
//----------------------------------------------
/**
* The points to use in the construction of Envelopes
*/
private EnvPoint[] pointArray = new EnvPoint[10];
private int sampleRate;
//----------------------------------------------
// Constructor
//----------------------------------------------
/**
* Basic default constructor to set an initial
* sampling rate
*
* @param sampleRate
*/
public PulseFifthsInst(int sampleRate) {
this.sampleRate = sampleRate;
EnvPoint[] tempArray = {
new EnvPoint((float) 0.0, (float) 0.0),
new EnvPoint((float) 0.02, (float) 1.0),
new EnvPoint((float) 0.15, (float) 0.6),
new EnvPoint((float) 0.9, (float) 0.4),
new EnvPoint((float) 1.0, (float) 0.0)
};
pointArray = tempArray;
}
//----------------------------------------------
// Methods
//----------------------------------------------
/**
* Initialisation method used to build the objects that
* this instrument will use
*/
public void createChain() {
// tonic
Oscillator wt = new Oscillator(this, Oscillator.PULSE_WAVE,
this.sampleRate, 2);
wt.setPulseWidth(0.15);
StereoPan span = new StereoPan(wt, (float) 0.2);
// fifth
Oscillator wt2 = new Oscillator(this, Oscillator.PULSE_WAVE,
this.sampleRate, 2);
wt2.setPulseWidth(0.15);
wt2.setFrqRatio((float) (3.0 / 2.0));
StereoPan span2 = new StereoPan(wt2, (float) 0.8);
// add together
AudioObject[] waves = {span, span2};
Add add = new Add(waves);
// continue to process
Envelope env = new Envelope(add, pointArray);
Volume vol = new Volume(env);
SampleOut sout = new SampleOut(vol);
}
}