Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site bbnccv.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!genrad!panda!talcott!harvard!bbnccv!sdyer From: sdyer@bbnccv.UUCP (Steve Dyer) Newsgroups: net.audio Subject: Re: Are DNR noise reducers sold commercially? Message-ID: <128@bbnccv.UUCP> Date: Fri, 8-Mar-85 12:51:50 EST Article-I.D.: bbnccv.128 Posted: Fri Mar 8 12:51:50 1985 Date-Received: Mon, 11-Mar-85 05:30:09 EST References: <494@hou2e.UUCP> Organization: Bolt Beranek and Newman, Cambridge, MA Lines: 17 I have a Burwen Dynamic Noise Filter which uses, I believe, discrete devices, unlike National Semiconductor's DNR chip which operates on the same principles. I have found that it works very well on many recordings, although REALLY noisy source material can cause audible pumping. Radio Shack is selling a "Video Sound Processor" which incorporates National's DNR chip (along with a lot of extra gunk like stereo synthesis). It might be a cheap (< $100) way to get DNR in your system. The Burwen unit is apparently still being manufactured and sold by Infinity (which bought out KLH (which bought out Burwen)). It lists for $350 which is a bit steep for non-critical noise-reduction. -- /Steve Dyer {decvax,linus,ima,ihnp4}!bbncca!sdyer sdyer@bbnccv.ARPA