import jm.audio.Instrument;
import jm.audio.io.SampleOut;
import jm.audio.synth.*;
/**
* A sawtooth waveform instrument implementation
* which iincludes a comb filter
*
* @author Andrew Brown
*/
public final class SawCombInst extends Instrument {
//----------------------------------------------
// Attributes
//----------------------------------------------
private int sampleRate;
private int delay;
private double decay;
private int channels;
//----------------------------------------------
// Constructor
//----------------------------------------------
/**
* Basic default constructor to set an initial
* sampling rate and buffersize in addition
* to the neccessary frequency relationships
* and volumes for each frequency to be added
* the instrument
*
* @param sampleRate
*/
public SawCombInst(int sampleRate) {
this(sampleRate, 300, 0.5);
}
/**
* Constructor that sets sample rate and the number of channels
*
* @param sampleRate The number of samples per second (quality)
* @param delay The duration of combing in milliseconds
*/
public SawCombInst(int sampleRate, int delay) {
this(sampleRate, delay, 0.5);
}
/**
* Constructor that sets sample rate and the number of channels
*
* @param sampleRate The number of samples per second (quality)
* @param delay The duration of combing in milliseconds
* @param decay The rate of feedback for the comb filter
*/
public SawCombInst(int sampleRate, int delay, double decay) {
this(sampleRate, delay, decay, 2);
}
/**
* Constructor that sets sample rate and the number of channels
*
* @param sampleRate The number of samples per second (quality)
* @param delay The duration of combing in milliseconds
* @param decay The rate of feedback for the comb filter
* @param channels 1 for Mono or 2 for Stereo
*/
public SawCombInst(int sampleRate, int delay, double decay, int channels) {
this.sampleRate = sampleRate;
this.delay = delay;
this.decay = decay;
this.channels = channels;
}
//----------------------------------------------
// Methods
//----------------------------------------------
/**
* Initialisation method used to build the objects that
* this instrument will use and specify thier interconnections.
*/
public void createChain() {
Oscillator wt = new Oscillator(this, Oscillator.SAWTOOTH_WAVE,
this.sampleRate, this.channels);
Comb filt = new Comb(wt, delay, decay);
Envelope env = new Envelope(filt,
new double[]{0.0, 0.0, 0.05, 1.0, 0.2, 0.4, 0.8, 0.3, 1.0, 0.0});
Volume vol = new Volume(env);
StereoPan span = new StereoPan(vol);
SampleOut sout = new SampleOut(span);
}
}