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From: mzenier@polari.UUCP (Mark Zenier)
Newsgroups: sci.electronics,comp.dsp
Subject: Re: A question about the Nyquist theorm
Message-ID: <3463@polari.UUCP>
Date: 5 Mar 91 19:49:40 GMT
References: <625@ctycal.UUCP> <11515@pasteur.Berkeley.EDU> <wilf.667759065@rigel.sce.carleton.ca>
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In article <wilf.667759065@rigel.sce.carleton.ca> wilf@sce.carleton.ca (Wilf Leblanc) writes:
>When I bought my CD player, it said on the front panel 'Dual D/A
>converters'.  For fun, I asked the salesperson what that meant.
>The reply was rather funny, and of course completely inaccurate.
>
>What does this really mean ?  (I figured maybe two distinct D/A's rather
>than 1 D/A and two sample and holds ??).

Some of the first ones used 1 D/A and sample and holds. The 
BBC wanted to broadcast monophonic off of some CD's.  With
the half sample time delay, it made the signal sound terrible.

They had to switch to one of the CD players with two 14 bit dacs.

Ancient history.

Mark Zenier  mzenier@polari.uucp  markz@ssc.uucp