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From: jeff@tesla.UUCP
Newsgroups: net.audio
Subject: Re: linear tracking turntable inquiry
Message-ID: <85@tesla.UUCP>
Date: Wed, 1-Jun-83 18:55:15 EDT
Article-I.D.: tesla.85
Posted: Wed Jun  1 18:55:15 1983
Date-Received: Tue, 7-Jun-83 13:02:06 EDT
References: tesla.81 tekmdp.1993
Lines: 6

I don`t see how the servo system can be open-looped after "learning the
groove".  Groove spacing varies according to depth of modulation--i.e.,
grooves are spaced wider where there`s a lot of high-amplitude bass
information--so that continuous error messages MUST be received & processed
by the servo.
JF