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JMusic - Java Music Library

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import jm.audio.AudioObject;
import jm.audio.io.SampleOut;
import jm.audio.synth.*;

/**
 * A basic amplitude modulation synthesis instrument
 * which implements envelope and volume control
 *
 * @author Andrew Brown
 */

public class AMInst extends jm.audio.Instrument {
    //----------------------------------------------
    // Attributes
    //----------------------------------------------
    /**
     * the sample rate passed to the instrument
     */
    private int sampleRate;
    /**
     * the sample rate passed to the instrument
     */
    private int channels;

    //----------------------------------------------
    // Constructor
    //----------------------------------------------

    /**
     * Basic default constructor to set an initial
     * sampling rate.
     *
     * @param sampleRate
     */
    public AMInst(int sampleRate) {
        this.sampleRate = sampleRate;
        this.channels = 1;
    }

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

    /**
     * Initialisation method used to build the objects that
     * this instrument will use.
     */
    public void createChain() {
        Oscillator mod = new Oscillator(this, Oscillator.SINE_WAVE,
                this.sampleRate, this.channels);
        mod.setFrqRatio((float) 7.5);
        Envelope env = new Envelope(mod,
                new double[]{0.0, 0.0, 0.4, 1.0, 1.0, 0.8});
        Value offsetAmp = new Value(this, this.sampleRate,
                this.channels, (float) 0.7);
        Add add = new Add(new AudioObject[]{env, offsetAmp});
        Oscillator carr = new Oscillator(add,
                Oscillator.SINE_WAVE, WaveTable.AMPLITUDE);
        Envelope env2 = new Envelope(carr,
                new double[]{0.0, 0.0, 0.5, 1.0, 1.0, 0.0});
        SampleOut sout = new SampleOut(env2);
    }
}