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From: Adam Myrow <myrowa@bellsouth.net>
To: "Speakup is a screen review system for Linux." <speakup@braille.uwo.ca>
Subject: Re: Audio processing
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On Sun, 15 Jun 2008, Kerry Hoath wrote:
> resample a file at 22050hz to 44100:
> sox file1.wav -r 44100 file2.wav

When I resample, I always use the polyphase effect.  I.E.
sox file1.wav -r 44100 file2.wav polyphase
Both my experience, and what I've read online show this to be a better way 
of doing it.  It takes longer, but sounds better.  HTH.