Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/5/84; site unmvax.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!bellcore!decvax!genrad!mit-eddie!godot!harvard!seismo!cmcl2!lanl!unmvax!cliff From: cliff@unmvax.UUCP Newsgroups: net.audio Subject: Re: More on PCM tape dubbing Message-ID: <571@unmvax.UUCP> Date: Sun, 6-Jan-85 18:51:38 EST Article-I.D.: unmvax.571 Posted: Sun Jan 6 18:51:38 1985 Date-Received: Wed, 9-Jan-85 02:11:12 EST References:<260@oakhill.UUCP> <287@oakhill.UUCP> Organization: Univ. of New Mexico, Albuquerque Lines: 33 > >> The best way I have found to dub CDs is actually onto open reel, 1/4 inch, > >> half-track tape at 15 ips with DBX type 1. > > ... > >> Said method actually provides better noise performance than dubbing to > >> digital VCR tape, using either a Technics SV-100 (EIAJ 14-bit) or Sony > >> PCM-701ES (using 16-bit format). > ... > >> in fact if not for the cost, I'd probably do all my dubbing onto analog in > >> the manner mentioned above. > > >Hmmm... I don't hear any noise when I dup CD's with my Nak DMP-100 (16-bit). > >Maybe I am not listening well enough or the tweaking that Nak requires is worth > >it (the Nak is a Sony that meets Nak's tolerance specs). Any idea where the > >noise comes from? Were those CD's digitally mastered? > > --Cliff [Matthews] > > > Let me give some detail on the experiments that led to the conclusion about > the relative noise performance of the two methods described above. informative article followed Thank you very much for the article. When I get some free time I will try to duplicate your tests on my PCM processor and my girlfriend's CD (NAD 5200), of course I will post my results. Do you know whether the space between tracks on CD's is just 0's or is there circuitry that totally mutes the analog output for a period of time? I am not sure and I have been to lazy to research it... --Cliff [Matthews] {purdue, cmcl2, ihnp4}!lanl!unmvax!cliff {csu-cs, pur-ee, convex, gatech, ucbvax}!unmvax!cliff 4744 Trumbull S.E. - Albuquerque NM 87108 - (505) 265-9143