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 sawtooth waveform instrument implementation
* which includes low and high pass filters act in series to
* form a band pass filter.
* @author Andrew Brown
*/
public final class BandPassFilterInst extends Instrument{
//----------------------------------------------
// Attributes
//----------------------------------------------
private int sampleRate;
private int filterCutoff;
private int channels;
//----------------------------------------------
// Constructor
//----------------------------------------------
/**
* Basic default constructor.
* @param sampleRate
*/
public BandPassFilterInst(int sampleRate){
this(sampleRate, 2500, 1);
}
/**
* Constructor that sets sample rate and the number of channels
* @param sampleRate The number of samples per second (quality)
* @param filterCutoff The frequency above which overtones are cut
*/
public BandPassFilterInst(int sampleRate, int filterCutoff){
this(sampleRate, filterCutoff, 1);
}
/**
* Constructor that sets sample rate and the number of channels
* @param sampleRate The number of samples per second (quality)
* @param filterCutoff The frequency above which overtones are cut
* @param channels 1 for Mono or 2 for Stereo
*/
public BandPassFilterInst(int sampleRate, int filterCutoff, int channels){
this.sampleRate = sampleRate;
this.filterCutoff = filterCutoff;
this.channels = channels;
}
//----------------------------------------------
// Methods
//----------------------------------------------
/**
* Initialisation method used to build the objects that
* this instrument will use and specify thier interconnections.
*/
@Override
public void createChain(){
Oscillator osc = new Oscillator(this, Oscillator.SAWTOOTH_WAVE, this.sampleRate, this.channels);
Filter lpf = new Filter(osc, this.filterCutoff, Filter.LOW_PASS);
Filter hpf = new Filter(lpf, this.filterCutoff, Filter.HIGH_PASS);
Volume vol = new Volume(hpf);
Envelope env = new Envelope(vol,
new double[] {0.0, 0.0, 0.05, 1.0, 0.2, 0.4, 0.8, 0.3, 1.0, 0.0});
StereoPan span = new StereoPan(env);
SampleOut sout = new SampleOut(span);
}
}