Date: Sun, 17 Jun 2001 09:21:33 +0300 (IDT)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: "J. Weeks" <jweeks AT mailandnews DOT com>
cc: djgpp AT delorie DOT com
Subject: Re: spectrum analyser code in DJGPP
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On Sat, 16 Jun 2001, J. Weeks wrote:

> Am I correct in thinking that I must perform a FFT on the audio stream? 
> If so, where can I find info (perhaps a beginners howto) on FFT?  If
> not, how else would I create an analyser?

Assuming that you do need to perform FFT (I don't have any experience
in processing audio streams), look on the net for a package named FFTW
("Fastest Fourier Transform in the West").  It's the fastest
implementation of FFT known to humanity, and should compile with DJGPP
with no fuss.