package vafusion.inst;
//==========================================================
// File: NoiseInst.java
// Package: inst
// Function: basic implementation of a white noise generator
// Author: Andrew Brown
// Environment: JDK1.1
//==========================================================
import jm.audio.io.*;
import jm.audio.synth.*;
import jm.audio.Instrument;
import jm.music.data.Note;
import jm.audio.AudioObject;
/**
* A basic white noise synthesis instrument implementation
* which implements envelope, pan, and volume control
* @author Andrew Brown
*/
public final class NoiseInst extends Instrument{
//----------------------------------------------
// Attributes
//----------------------------------------------
/** The points to use in the construction of Envelopes */
private EnvPoint[] pointArray = new EnvPoint[10];
private int channels;
private int sampleRate;
private int noiseType;
//----------------------------------------------
// Constructor
//----------------------------------------------
/**
* Basic default constructor to set an initial
* sampling rate.
* @param sampleRate
*/
public NoiseInst(int sampleRate){
this(sampleRate, 1);
}
/**
* A second constructor to set an initial
* sampling rate and number of channels.
* @param sampleRate
* @param channels (i.e., 1 = mono, 2 = stereo)
*/
public NoiseInst(int sampleRate, int channels){
this(sampleRate, channels, Noise.WHITE_NOISE);
}
/**
* A constructor to set an initial
* sampling rate, number of channels and type of noise.
* @param sampleRate
* @param channels (i.e., 1 = mono, 2 = stereo)
* @ param noiseType 0 = White noise etc.
*/
public NoiseInst(int sampleRate, int channels, int noiseType){
this.sampleRate = sampleRate;
this.channels = channels;
this.noiseType = noiseType;
}
//----------------------------------------------
// Methods
//----------------------------------------------
/**
* Initialisation method used to build a chain of the objects that
* this instrument will use.
*/
@Override
public void createChain(){
Noise noise = new Noise(this, noiseType, this.sampleRate, channels);
Envelope env = new Envelope(noise,
new double[] {0.0, 0.0, 0.05, 1.0, 0.95, 1.0, 1.0, 0.0});
Volume vol = new Volume(env);
StereoPan span = new StereoPan(vol);
SampleOut sout = new SampleOut(span);
}
}