import jm.audio.AudioObject;
import jm.audio.Instrument;
import jm.audio.io.SampleOut;
import jm.audio.synth.*;
/**
* A basic triangle wave instrument implementation
* which implements envelope and volume control
*
* @author Andrew Brown and Andrew Sorensen
*/
public final class TriangleRepeatInst 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 and buffersize in addition
* to the neccessary frequency relationships
* and volumes for each frequency to be added
* the instrument
*
* @param sampleRate
* @param buffersize
* @param frequencies the relative freqencies to use
* @param volumes the volumes to use for the frequencies
*/
public TriangleRepeatInst(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) 0.95, (float) 0.2),
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() {
Oscillator wt = new Oscillator(this, Oscillator.TRIANGLE_WAVE,
this.sampleRate, 1);
Envelope env = new Envelope(wt, pointArray);
Volume vol = new Volume(env);
Delay delay = new Delay(vol, 4000);
AudioObject[] sources = {vol, delay};
Add add = new Add(sources);
SampleOut sout = new SampleOut(add);
}
}