Generate sound

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;

public class SndGen {
    public static void main(String[] args) throws IOException {
        double freqs[]=new double[]{440, 660, 880};
        double amplitudes[]=new double[]{1,1,1};
        double sampleFreq=44000;
        double lengthInSecs=5;
        int nSample=(int)(lengthInSecs*sampleFreq);
        ByteBuffer bb=ByteBuffer.allocate(8);
        bb.order(ByteOrder.LITTLE_ENDIAN);
        byte[] buffer=new byte[8];
        for(int i=0;i<nSample;++i)
        {
            double t=i*1.0/sampleFreq;
            double sample=0;
            for(int j=0;j<freqs.length;++j)
            {
                double omega=freqs[j]*2.0*Math.PI;
                sample+=amplitudes[j]*Math.sin(omega*t);
            }
            bb.clear();
            bb.putDouble(sample);
            bb.flip();
            bb.get(buffer);
            System.out.write(buffer);
        }
    }
}