Wouldn't that be compression, instead of normalization?
I still have an old DBX compressor/expander box where I can choose to
compress over the whole range, or set it to peak limiting mode and only
compress over a certain threshold. It sounds like it might be valuable to
have a routine that can do peak limiting, and then normalize the result.
mark stephens
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Richard A. Smith
Sent: Monday, January 17, 2000 10:43 AM
To: [EMAIL PROTECTED]
Subject: Re: [MP3 ENCODER] Normalization routine?
Before I burn stuff to CD's I usually hand normalize the music with
CoolEdit. It's been my experience that you can introduce quite a bit
of clipping in the waveform without any noticable quality loss. In
fact several of the songs ripped directly from my CD's had a
suprising ammount of clipping to begin with.
I doubt that any normalization routine rounding errors are going to
make a perceved quality difference. The problem that I find with
automatic normalization programs is that they normalize to the peak
level which can still leave quite a bit of difference between a quiet
song and a loud song.
An intelligent normalization routine would be quite handy. To do
this properly however I think you will need some sort of 2 pass
procedure. 1 to run through the file and compute the scale factor
and then a second pass to apply it.
--
Richard A. Smith Bitworks, Inc.
[EMAIL PROTECTED] 501.846.5777
Sr. Design Engineer http://www.bitworks.com
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