SynWave.java

    frequency = new Random.nextInt(30)+220;
    public static byte[] genSynNoise(AudioFormat format, double length,int frequency){
        int samplesCount = (int) (length * format.getSampleRate());
        ByteBuffer noiseBuffer = ByteBuffer.allocate(samplesCount*2);
        double period = format.getSampleRate()/frequency;
        for (int i=0;i<samplesCount;i++){
            double n = Short.MAX_VALUE/4 * Math.sin(2*Math.PI*i/period);
            noiseBuffer.putShort((short) n);
        }
        return noiseBuffer.array();
    }