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From: layes@ug.cs.dal.ca (Jonathan Layes)
Subject: Re: Lowpass? Filter?
Message-ID: <BypwuH.BuL@cs.dal.ca>
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Organization: Math, Stats & CS, Dalhousie University, Halifax, NS, Canada
References: <1fjkcgINN8h8@agate.berkeley.edu> <1668@titan.hts.hsa.nl> <1flkdbINNh8e@agate.berkeley.edu>
Date: Fri, 4 Dec 1992 04:37:29 GMT
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In article <1flkdbINNh8e@agate.berkeley.edu> ksanthan@garnet.berkeley.edu (Kumaran Santhanam) writes:
>I'm sorry, Thijs...I meant in software.  I want to know how to implement
>the mathematics for a lowpass filter.  I have a stream of SoundBlaster Pro
>data in 8-bit amplitude format.  I want to implement a lowpass for this.

Look in any standard text dealing with Fourier transforms, and to
do the discrete Fourier transform in any realistic amount of time,
look up a FFT algorithim.  All the necessary information should be
there.  (there are lots of texts on the subject - I just presented
a seminar on such stuff)

Jonathan

-- 
Jonathan Layes                 / \    / \  "In case of fire.... shout FIRE!"
Physics & Computing Science   (  *)  (  *)    "If it doesn't work, hit it 
Dalhousie University           \ /  \ \ /          with a big stick!"
Halifax, Nova Scotia                _)       E-mail to: layes@Ug.CS.Dal.CA 
