import jm.audio.Instrument;
import jm.audio.synth.Envelope;
import jm.audio.synth.Filter;
import jm.audio.synth.Oscillator;
import jm.audio.synth.Volume;
/**
* A monophonic sawtooth waveform instrument implementation
* which includes a static low pass filter.
*
* @author Andrew Brown
*/
public final class SawLPFInstRT extends Instrument {
//----------------------------------------------
// Attributes
//----------------------------------------------
private int sampleRate;
private int filterCutoff;
private int channels;
//----------------------------------------------
// Constructor
//----------------------------------------------
/**
* Basic default constructor
*/
public SawLPFInstRT() {
this(44100, 1000);
}
/**
* Basic default constructor to set an initial
* sampling rate and use a default cutoff.
*
* @param sampleRate
*/
public SawLPFInstRT(int sampleRate) {
this(sampleRate, 1000);
}
/**
* Constructor that sets sample rate and the filter cutoff frequency.
*
* @param sampleRate The number of samples per second (quality)
* @param filterCutoff The frequency above which overtones are cut
*/
public SawLPFInstRT(int sampleRate, int filterCutoff) {
this.sampleRate = sampleRate;
this.filterCutoff = filterCutoff;
this.channels = 1;
}
//----------------------------------------------
// Methods
//----------------------------------------------
/**
* Initialisation method used to build the objects that
* this instrument will use and specify thier interconnections.
*/
public void createChain() {
Oscillator wt = new Oscillator(this, Oscillator.SAWTOOTH_WAVE, this.sampleRate, this.channels);
Filter filt = new Filter(wt, this.filterCutoff, Filter.LOW_PASS);
Envelope env = new Envelope(filt,
new double[]{0.0, 0.0, 0.05, 1.0, 0.3, 0.4, 1.0, 0.0});
Volume vol = new Volume(env);
// SampleOut sout = new SampleOut(vol);
}
}