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From: bointon@kcl-cs.UUCP (Marcus Barnaby Bointon)
Newsgroups: comp.dsp
Subject: Filters with arbitrary response
Message-ID: <1864@xenon.kcl-cs.UUCP>
Date: 12 Dec 90 14:13:56 GMT
Reply-To: bointon@kcl-cs.UUCP (Marcus Barnaby Bointon)
Organization: Dept. of Computing, Kings College London
Lines: 15


   I am after a digital filter that has an arbitrary response. I want to 
implement a digital graphic equaliser for high quality audio. I have had
suggestions of approaches by multiple band pass, but I believe it to be
quite possible to have one where the coefficients are calculated in the 
frequency domain, which seems sensible. Anyone know of a good algorithm for
this? 

   I would also be most grateful if anyone could give me some info on filters,
FFTs etc that are intended for REAL data! This seems almost impossible to find-
doesn't anyone use ADCs!??

			Thanks in advance,

						Marcus Bointon.