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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]
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