Xref: utzoo rec.music.makers:5538 sci.electronics:8538
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!cs.utexas.edu!uunet!brunix!bk
From: bk@cs.brown.edu
Newsgroups: rec.music.makers,sci.electronics
Subject: home-made digital effects
Message-ID: <20445@brunix.UUCP>
Date: 10 Nov 89 21:07:12 GMT
Sender: news@brunix.UUCP
Reply-To: bk@cs.brown.edu ()
Distribution: usa
Organization: Brown University Department of Computer Science
Lines: 20

Does anyone have any experience with building simple digital effects for
audio signals.  More specifically, I play guitar, and I would like to
build an effects box for my electronic guitar.  Something based on delay
circuitry, with feedback loops, oscillating clock speeds, etc...  Right now
I'm thinking of using a big RAM chip for the delay: feed the guitar line into
an Analog to Digital converter (AtoD), put its output into the RAM chip at an address
specified by a counter, get the contents of the RAM chip at an address which is
some variable distance "behind" the input address, and feed this value to a
Digital to Analog converter.

Is there any info out there on this?  I know that there exist tons of info
on digital signal processing, but I'm only interested in this very specific
portion of it.  I also don't want the design to get too complicated.

Anything would be appreciated.


                     ---  Brian Knep             uunet!brunix!bk   
                          Brown University       bk@cs.brown.edu
                                                 bk@browncs.bitnet