import jm.audio.AOException;
import jm.audio.AudioObject;
import jm.audio.io.SampleOut;
import jm.audio.synth.*;
/**
* A basic vibrato from FM synthesis
*
* @author Andrew Brown
*/
public final class VibratoInst extends jm.audio.Instrument {
//----------------------------------------------
// Attributes
//---------------------------------------------
/**
* The number of channels
*/
private int channels;
/**
* The deviation index
*/
private int modIndex;
/**
* The frequency ratio from the carrier frequency (the notes pitch)
*/
private float frqRatio;
private int sampleRate;
//----------------------------------------------
// Constructor
//----------------------------------------------
/**
* Basic default constructor to set an initial
* sampling rate.
*
* @param sampleRate
*/
public VibratoInst(int sampleRate) {
this(sampleRate, 1);
}
/**
* A constructor to set an initial
* sampling rate and number of channels.
*
* @param sampleRate
* @param channels The number of channels
*/
public VibratoInst(int sampleRate, int channels) {
this.sampleRate = sampleRate;
this.channels = channels;
}
//----------------------------------------------
// Methods
//----------------------------------------------
/**
* Initialisation method used to build the objects that
* this instrument will use
*/
public void createChain() throws AOException {
// modulator
Oscillator modulator = new Oscillator(this, Oscillator.SINE_WAVE,
sampleRate, channels,
Oscillator.FREQUENCY, 5.0);
modulator.setAmp((float) 8.0);
// constant
Value constFreq = new Value(this, this.sampleRate,
this.channels, Value.NOTE_PITCH);
Add add = new Add(new AudioObject[]{constFreq, modulator});
// carrier
Oscillator carrier = new Oscillator(add,
Oscillator.SINE_WAVE, Oscillator.FREQUENCY);
Envelope env2 = new Envelope(carrier,
new double[]{0.0, 0.0, 0.1, 1.0, 1.0, 0.0});
Volume amp = new Volume(env2);
SampleOut sout = new SampleOut(amp);
}
}