{
  guint j;
  double squaresum = 0.0;
  double RMS = 0.0;
  double RMS_dB = 0.0;
  static int threshold_dB = -80;
  static long int sample = 0;
  double timepoint;

  /*
   * process data here  
   * input sample data enters in *in_data as 8 or 16 bit data
   * samples for left and right channel are interleaved
   */
/*
  for(j = 0; j < num_samples; j++) {
     out_data[j] = in_data[j];
     squaresum += in_data[j] * in_data[j];
  }
  RMS = sqrt (squaresum / (float) num_samples);
  printf ("RMS for this block : %f\n", RMS);
  RMS_dB = 20 * log (RMS / 32767);
  printf ("RMS in dB (for 16bit) : %f\n", RMS_dB);
*/

  for(j = 0; j < num_samples; j++) {
     out_data[j] = in_data[j];
     squaresum += pow ((double) in_data[j] / 32767.0, 2);
  }
  RMS = sqrt (squaresum / (float) num_samples);
  RMS_dB = 10 * log (RMS);
  sample += num_samples;
  timepoint = sample / (44100.0 * 2);

  if (RMS_dB > (double) threshold_dB)
  {
/*    printf ("Reached %d dB at %f sec (%f dB)\n", 
	    threshold_dB, timepoint, RMS_dB);
*/
    threshold_dB += 1;
  }
/*  printf ("RMS in dB (for 16bit) : %f\n", RMS_dB); */
    printf ("%f s %f dB\n", timepoint, RMS_dB);
}