[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
http://www.digitalsignallabs.com

[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.

[Peter Larsen[_3_]]

Randy Yates wrote:

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, this is about what a specific software program does, ie. about what
the designer of it means.

--Randy

Kind regards

Peter Larsen

[Randy Yates]

"Peter Larsen" writes:

Randy Yates wrote:

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, this is about what a specific software program does, ie. about what
the designer of it means.

Agreed, and the thread you interrupted is about the operations the
designer might have implemented, given the common meanings of power and
averaging.
--
% Randy Yates % "Though you ride on the wheels of tomorrow,
%% Fuquay-Varina, NC % you still wander the fields of your
%%% 919-577-9882 % sorrow."
%%%% % '21st Century Man', *Time*, ELO
http://www.digitalsignallabs.com

[Peter Larsen[_3_]]

Randy Yates wrote:

Agreed, and the thread you interrupted is about the operations the
designer might have implemented, given the common meanings of power
and averaging.

I also *did* comment on those Randy ... O;-) ... this software-designer has
more of a musical or musicians approach to this aspect of it than a
technical one.

Kind regards

Peter Larsen