"normalize" for streaming audio
Frank Cox
theatre at sasktel.net
Mon Dec 8 00:34:25 UTC 2008
On Sun, 07 Dec 2008 17:17:25 -0700
stan wrote:
> I have a question instead of an answer. Do you run the
> normalize before you play the mp3 file, or do you normalize
> while you are playing? I ask because normalize means that
> the amplitude of the whole file is raised until the loudest
> sound in the file is at or just below some max amplitude.
You run normalize on a directory of mp3 files and it does whatever it does to
keep the volumes within a reasonable range.
> You see the problem? Until the whole streaming file has
> arrived there is no way for any normalize routine to know
> what the maximum amplitude in the file is, and thus adjust
> the rest of it.
For movie theatres, there is a gizmo called an "afterburner" that you can add to
your sound system that will prevent some sound-jockey's idea of a sudden crash
or shotgun blast from ripping your speakers out of their cabinets. That's more
of a limiter than a "normalizer" though.
> So I would say there probably isn't a normalize for
> streaming audio. Unless there is some kind of buffer and
> delay. i.e. you're always one song behind. Or you like
> listening to music that has no dynamics. :-)
I suspect you're right but I've been surprised before.
--
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