[Randy Yates]

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.
--
% Randy Yates % "Maybe one day I'll feel her cold embrace,
%% Fuquay-Varina, NC % and kiss her interface,
%%% 919-577-9882 % til then, I'll leave her alone."
%%%% % 'Yours Truly, 2095', *Time*, ELO
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