import jm.audio.Instrument;
import jm.audio.io.SampleOut;
import jm.audio.synth.*;
/**
* A basic additive synthesis instrument implementation
* which implements different envelopes for odd and even harmonics
*
* @author Andrew Brown
*/
public final class OddEvenInst extends Instrument {
//----------------------------------------------
// Attributes
//----------------------------------------------
private static int count = 0;
/**
* the relative frequencies which make up this note
*/
private float[] frequencies;
/**
* the volumes to use for each frequency
*/
private float[] volumes;
/**
* Pan
*/
private float pan;
/**
* The sample Rate to use
*/
private int sampleRate;
/**
* The Oscillators to use for each frequency specified
*/
private Oscillator[] wt;
/**
* The envelope to apply to each Oscillator's output
*/
private Envelope[] env;
/**
* The volume to apply to each envelopes output
*/
private Volume[] vol;
/**
* Stereo Pan Audio Object
*/
private StereoPan[] span;
private boolean header = true;
private SampleOut sout;
private int numberOfOvertones = 16;
/**
* the envelope data
*/
private EnvPoint[] pointArray0 = {
new EnvPoint((float) 0.0, (float) 0.0),
new EnvPoint((float) 0.1, (float) 1.0),
new EnvPoint((float) 0.4, (float) 0.6),
new EnvPoint((float) 0.9, (float) 0.3),
new EnvPoint((float) 1.0, (float) 0.0)
};
private EnvPoint[] pointArray1 = {
new EnvPoint((float) 0.0, (float) 0.0),
new EnvPoint((float) 0.1, (float) 1.0),
new EnvPoint((float) 0.9, (float) 0.1),
new EnvPoint((float) 1.0, (float) 0.0)
};
private EnvPoint[] pointArray2 = {
new EnvPoint((float) 0.0, (float) 0.0),
new EnvPoint((float) 0.1, (float) 0.1),
new EnvPoint((float) 0.9, (float) 1.0),
new EnvPoint((float) 1.0, (float) 0.0)
};
//----------------------------------------------
// Constructor
//----------------------------------------------
/**
* A simple constructor
*
* @param int sampleRate
*/
public OddEvenInst(int sampleRate) {
//Provide some defaults
this.sampleRate = sampleRate;
this.frequencies = new float[numberOfOvertones];
this.volumes = new float[numberOfOvertones];
}
/**
* A constructor that allows definition of the timbral complexity
*/
public OddEvenInst(int sampleRate, int numbOfOvertones) {
//Provide some defaults
this.sampleRate = sampleRate;
this.numberOfOvertones = numbOfOvertones;
this.frequencies = new float[numberOfOvertones];
this.volumes = new float[numberOfOvertones];
}
//----------------------------------------------
// Methods
//----------------------------------------------
/**
* Initialisation method is used to build the objects that
* this instrument will use
*/
public void createChain() {
env = new Envelope[frequencies.length];
vol = new Volume[frequencies.length];
span = new StereoPan[frequencies.length];
wt = new Oscillator[frequencies.length];
for (int i = 0; i < numberOfOvertones; i++) {
wt[i] = new Oscillator(this, Oscillator.SINE_WAVE,
this.sampleRate, 2);
wt[i].setFrqRatio((float) i + 1);
// fundamental
if (i == 0) env[i] = new Envelope(wt[i], pointArray0);
// odd harmonics
if (i % 2 == 0 && i != 0) {
env[i] = new Envelope(wt[i], pointArray1);
// even harmonics
} else {
if (i != 0) env[i] = new Envelope(wt[i], pointArray2);
}
vol[i] = new Volume(env[i], (float) ((1.0 / (i + 1)) * 1.5));
span[i] = new StereoPan(vol[i], this.pan);
}
//And now the add object brings us back to one path.
Add add = new Add(span);
SampleOut sout = new SampleOut(add);
}
}