package vafusion.inst;
import jm.audio.Instrument;
import jm.audio.io.*;
import jm.audio.synth.*;
import jm.music.data.Note;
import jm.audio.AudioObject;
/**
* A basic pulsewave waveform instrument implementation
* which implements envelope , pan, and volume control
* @author Andrew Brown and Andrew Sorensen
*/
public final class PulsewaveInst extends Instrument{
//----------------------------------------------
// Attributes
//----------------------------------------------
/** The points to use in the construction of Envelopes */
private EnvPoint[] pointArray = new EnvPoint[10];
private int sampleRate;
private SampleOut sout;
//----------------------------------------------
// 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 PulsewaveInst(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)0.3),
new EnvPoint((float)1.0, (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.PULSE_WAVE,
this.sampleRate, 2);
wt.setPulseWidth(0.15);
Envelope env = new Envelope(wt, pointArray);
Volume vol = new Volume(env);
StereoPan span = new StereoPan(vol);
if(output == RENDER) sout = new SampleOut(span);
}
}