/** Computes the RMS volume of a group of audio samples (0 to 1) */
static double audio_rmsVolume_shorts(short[] raw) {
  if (empty(raw)) ret 0;
  double sum = 0;
  for (int ii=0; ii<raw.length; ii++)
    sum += raw[ii];
  double average = sum/raw.length;

  double sumMeanSquare = 0d;
  for (int ii=0; ii<raw.length; ii++)
    sumMeanSquare += Math.pow(raw[ii]-average, 2d);
    
  double averageMeanSquare = sumMeanSquare/raw.length;
  double rootMeanSquare = Math.sqrt(averageMeanSquare);

  ret rootMeanSquare/Short.MAX_VALUE;
}

Began life as a copy of #1009778