package vafusion.inst;
import jm.audio.io.*;
import jm.audio.synth.*;
import jm.music.data.Note;
import jm.audio.AudioObject;
/**
* A basic sine instrument implementation
* which changes the decay envelope on each instantiation.
* @author Andrew Sorensen and Andrew Brown
*/
public final class VaryDecaySineInst extends jm.audio.Instrument{
//----------------------------------------------
// Attributes
//----------------------------------------------
/** The points to use in the construction of Envelopes */
private EnvPoint[] pointArray = new EnvPoint[10];
/** The number of channels */
private int channels;
/** the sample rate passed to the instrument */
private int sampleRate;
//----------------------------------------------
// Constructor
//----------------------------------------------
/**
* Basic default constructor to set an initial
* sampling rate.
* @param sampleRate
*/
public VaryDecaySineInst(int sampleRate){
this(sampleRate, 2);
}
/**
* A constructor to set an initial
* sampling rate and number of channels.
* @param sampleRate
*/
public VaryDecaySineInst(int sampleRate, int channels){
this.sampleRate = sampleRate;
this.channels = channels;
EnvPoint[] tempArray = {
new EnvPoint((float)0.0, (float)0.0),
new EnvPoint((float)0.001, (float)1.0),
new EnvPoint((float)0.1, (float)0.5),
new EnvPoint((float)(Math.random() * 0.4 + 0.3), (float)0.05),
new EnvPoint((float)(Math.random() * 0.3 + 0.7), (float)0.0)
};
pointArray = tempArray;
}
//----------------------------------------------
// Methods
//----------------------------------------------
/**
* Initialisation method used to build the objects that
* this instrument will use
*/
@Override
public void createChain(){
Oscillator wt = new Oscillator(this, Oscillator.SINE_WAVE,
this.sampleRate, channels);
Envelope env = new Envelope(wt, pointArray);
Volume vol = new Volume(env);
StereoPan span = new StereoPan(vol);
SampleOut sout = new SampleOut( span);
}
}