[Peter Larsen[_3_]]

Randy Yates wrote:
Norbert Hahn writes:

"Richard Crowley" wrote:

"apa" wrote ...
Here's the confusion more specifically. Adobe Audition Statistics
window has two different averaged values for the same selected
audio segment (i.e. the same time period). One they call "Average
Power RMS" which would seem straight forward except that they also
have a "Total Power RMS". This value tends to be slightly lower
than the "Average Power RMS" value. I'm wonder what the
difference in the averaging is.

I would guess that the "Total" number is the RMS average over the
entire timeline. The question is what period the "Average" number
is integrated over?

Both values are always calculated over the highlighted part of the
song. In nothing is highlighted the total song is evaluated.
When you click "help" on the statistics windows and then goto
"Waveform Statistics options" you can read:
"Average RMS Power - Shows the average amplitude. This value reflects
perceived loudness."
"Total RMS Power - Represents the total power of the entire
selection."

Norbert,

What do you mean by "average amplitude?"

Power is joules / second. volts are joules / coulomb. amps are
coulombs / second. v * i = joules / second, or power. If you
integrate v * i over time, you get the total joules over that time.
If you then divide the total joules by the time period T, you get
power back again.

--Randy

PS: I'm assuming that you mean "Average Power" and "Total Power,"
i.e., that the "RMS" is a misnomer. Volts can be RMS, not power.