RTSimpleFMInst.java

package vafusion.inst;

import jm.audio.io.*;
import jm.audio.synth.*;
import jm.music.data.Note;
import jm.audio.AudioObject;
import jm.audio.AOException;

/**
 * A basic FM synthesis instrument implementation
 * @author Andrew Sorensen
 */

public final class RTSimpleFMInst extends jm.audio.Instrument{
	//----------------------------------------------
	// Attributes
	//----------------------------------------------
	/** The wavetables to use for each frequency specified */
	private WaveTable wt1;
	/** The wavetables to use for each frequency specified */
	private WaveTable wt2;
	/** The envelope to apply to each wavetable's output */
	private Envelope env;
	/** Add the streams together */
	private Add add;
	/** The volume to apply to each envelopes output */
	private Volume vol;
	/** This is where it all gets added together */
	public SampleOut sout;
	/** Pan */
	private float pan;
	/** The points to use in the construction of Envelopes */
	private EnvPoint[] pointArray = new EnvPoint[10];
	/** The number of channels */
	private int channels;
	/** The deviation index */
	private int dIndex;
	/** 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 RTSimpleFMInst(int sampleRate, int dIndex, double ratio){
	    this(sampleRate, 1, dIndex, ratio);
	}
	/**
	 * A constructor to set an initial 
	 * sampling rate and number of channels.
	 * @param sampleRate 
	 */
	public RTSimpleFMInst(int sampleRate, int channels, int dIndex, double ratio){
		this.sampleRate = sampleRate;
		EnvPoint[] tempArray = {
			new EnvPoint((float)0.0, (float)0.0),
			new EnvPoint((float)0.1, (float)1.0),
			new EnvPoint((float)0.15, (float)0.4),
			new EnvPoint((float)0.9, (float)0.3),
			new EnvPoint((float)1.0, (float)0.0)
		};
		pointArray = tempArray;
		this.channels = channels;
		this.dIndex = dIndex;
		this.frqRatio = (float)ratio;
	}

	//----------------------------------------------
	// Methods 
	//----------------------------------------------

	@Override
	public void setController(double[] index){
		if(this.wt1 == null)return;
		this.wt1.setAmp((float)index[0]);
	}
	   
	/**
	 * Initialisation method used to build the objects that
	 * this instrument will use
	 */
	@Override
	public void createChain()throws AOException{
		Oscillator osc = new Oscillator(this, Oscillator.SINE_WAVE, this.sampleRate, this.channels); 
		osc.setAmp(this.dIndex);
		osc.setFrqRatio(this.frqRatio);
		Value cf = new Value(this,this.sampleRate,this.channels,1);
		AudioObject[] grp1 = {cf,wt1};
		Add add = new Add(grp1);
		Oscillator osc2 = new Oscillator(add,Oscillator.SINE_WAVE, 1);
		Envelope env = new Envelope(osc2,pointArray);
		Volume vol = new Volume(env,(float)1.0);
/*
		
		Splitter split = new Splitter(vol);
		Comb comb1 = new Comb(split,30,0.5);
		Comb comb2 = new Comb(split,40,0.5);
		Comb comb3 = new Comb(split,157,0.5);
		Comb comb4 = new Comb(split,90,0.5);
		AudioObject[] grp2 = {comb1,comb2,comb3,comb4};
		Add add2 = new Add(grp2);
		AllPass ap1 = new AllPass(add2,200,0.5);
		AllPass ap2 = new AllPass(ap1,50,0.5);
*/
		
		StereoPan span = new StereoPan(vol);
		//SampleOut sout = new SampleOut(span, "jmusic.tmp");
	}	
}