Sine Wave Sound Generator in Java

Question

What\'s the simplest way to generate a sine wave sound at any frequency in Java? A sample size more than 2 bytes would help, but it doesn\'t really matter.

Answer 1

The createSinWaveBuffer() method in these answers does not produce good waveform data for playing continuously. Need to have the last byte be near zero to have a complete waveform. Better example -

protected static final float SAMPLE_RATE = 16 * 1024;

public static byte[] createSinWaveBuffer(double freq) {
   double waveLen = 1.0/freq;
   int samples = (int) Math.round(waveLen * 5 * SAMPLE_RATE);
   byte[] output = new byte[samples];
   double period = SAMPLE_RATE / freq;
   for (int i = 0; i < output.length; i++) {
       double angle = 2.0 * Math.PI * i / period;
       output[i] = (byte)(Math.sin(angle) * 127f);  }

   return output;
}