[Peter Larsen[_3_]]

Norbert Hahn wrote:

According to the help file Audition's "Average RMS power" tries to
resample the perceived loudness it *should* apply some weighing factor
because low and high frequencies give a different loudness than mid
range frequencies do.

That concept per se is as broken as the concept of non-adjustable loudness
in an amplifier because playback level is unknown.-

Mid range contributes most to perceived
loudness.

The helpfile may quite possibly be ill applied or broken, there is a
frequency compensation mode for the averaging in the group normalize tool,
but not in the edit view statistics tool. The group normalize statistics
seem to also make some other asumptions since the results seemed to differ
from the statistics tool in the edit view window last time I was there. I
have some average loudness guidelines that work well for me as "house
standard" and they are based on the statistics tool in the edit view, ain't
seen no reason to use the group normalize tool since it appears to me to
make some undisclosed asumptions and weightings.

Kind regards

Peter Larsen

I checked this assumption with 44 Hz, 440 Hz, and 14000 Hz
sine wave @ -6 dB and always got the same values for both Average RMS
power and Total RMS power - unfortunatley.

Wavegain, however, does filter the files to approximate the perceived
loudness:
Analyzing...

Gain | Peak | Scale | New Peak | Track
--------------------------------------------
+6.00 dB | 16422 | 2.00 | 32765 | C:\temp\44.wav
-8.81 dB | 16422 | 0.36 | 5956 | C:\temp\440.wav
+6.00 dB | 16415 | 2.00 | 32765 | C:\temp\14000.wav

WaveGain Processing completed normally

MP3gain is said to do the same processing.

Norbert