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From: crandell@ut-sally.UUCP (Jim Crandell)
Newsgroups: net.audio
Subject: Re: Warped records
Message-ID: <2126@ut-sally.UUCP>
Date: Fri, 27-Apr-84 01:01:52 EST
Article-I.D.: ut-sally.2126
Posted: Fri Apr 27 01:01:52 1984
Date-Received: Sat, 28-Apr-84 09:22:50 EST
References: <159@olivej.UUCP> <868@brl-vgr.ARPA>
Organization: U. Texas CS Dept., Austin, Texas
Lines: 23

>  Do these new microprocessor tone arms actually know enough
>  to vary the speed of the platter, or do they use some time shifting
>  circuitry?

Good question, but in most cases it's academic, unless they've got
the platter on about half a horse through a VERY tight drive.
Some of those multi-wiggle jobs are going to require angular acceleration
functions containing components at pretty nasty frequencies.  Of course,
you can get a similar effect by shifting the base of the arm mount,
which probably would be trading one mechanical nightmare for another.
At any rate, I haven't seen any that appear to do that.

Time-shifting circuitry?  Interesting idea.  BUT, how many Real Audiophiles
are going to stand still for anything that requires a SAD (let's not
kid ourselves -- there's no other feasible way to do it) in the
playback chain?  (Unless, of course, you really want to mount your
speakers on motion bases.)
-- 

    Jim Crandell, C. S. Dept., The University of Texas at Austin
               {ihnp4,seismo,ctvax}!ut-sally!crandell