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Maximal rms power notation

 
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CDJonah_alt



Joined: 15 Mar 2007
Posts: 378

PostPosted: Wed Aug 20, 2008 2:54 pm    Post subject: Maximal rms power notation Reply with quote

I think this _might_ be useful if one wanted to normalize sounds so they
are comparable in listening if there is a very short strong impulses in
them. What you are doing is averaging a section of the wave, the length
defined by the time interval, and then setting maximum of these averages
to the same set value. You then of course need to set this level low
enough that you don't distort the file.

Quite honestly, I can't see where I would ever use this setting; it
seems too dangerous to me. Of course, walking between the towers of
Notre Dame also seems too dangerous to me but more well balanced people
than I do it, so it may be my lack of knowledge.

If you want to know how I do set levels for multiple tracks on a CD to
make reasonably well-balanced sound, check the archive. It is
relatively safe (assuming you or excel does the arithmetic correctly).

Chuck

Phil X Milstein wrote:
Quote:
Hi, I had much the same problem with Normalize, until I discovered that the
radio button at the bottom of the Normalize dialog should be set to Maximal
Sample Value, rather than Maximal RMS Power. I'm not sure what the latter is
supposed to do (nor how to work it, if I did), but I've found that by
ignoring it, going with the top button and selecting a factor of 95% I get
consistently excellent results.

I hope this helps, Phil M.


benedict_carey wrote:


Quote:
after normalizing about 3 hours worth of 3 to 10 minute files for work (using
the RMS algorithm normalizing to 85%), I discovered that this wretched program
allows the waveform to become distorted instead of doing what normalizing is
supposed to do and find the loudest part of the track and bring the overall
level up until the loudest part is at (for example) 85% of the available
volume range. What an oversight! I now have to go back and re-record about 80
minutes worth of stuff off DAT and look totally unprofessional. Really, really
disappointed in Amadeus especially when I heard it was supposed to be pretty
good.




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--
Charles D. Jonah CDJonah@anl.gov
630-252-3471
Chemistry Division
Argonne National Laboratory
Argonne, IL 60439



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