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From: gtward@wateng.UUCP (Greg Ward)
Newsgroups: net.audio
Subject: Re: Print-thru: Magnetic or Mechanical
Message-ID: <2860@wateng.UUCP>
Date: Fri, 8-Nov-85 15:08:18 EST
Article-I.D.: wateng.2860
Posted: Fri Nov  8 15:08:18 1985
Date-Received: Thu, 14-Nov-85 01:30:16 EST
References: <937@cvl.UUCP>
Distribution: na
Organization: U of Waterloo, Ontario
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>   If it is a mechanical phenomenon, then it should be stronger in one
> channel (the channel etched on the side adjoining the next groove) than
> the other.  The record should also be in the same orientation at the
> onset of the pre-echo and at the onset of the corresponding music.
> Since I don't have any records with noticeable print-thru, I'd be interested
> to hear if other people's print-thru satifies/doesn't satisfy these
> conditions.
> 
>                           - John Canning (jc@cvl.umd.edu.arpa)

Your argument for why mechanical print through would be stronger on one
channel then the other is incorrect. You seem to be suggesting that each
channel is recorded on a different side of the groove. In fact, how the
two channels are multiplexed in the groove is that one channel is
recorded in the side to side variations of the groove, and the other is
recorded in the up and down variations.

                            - Greg Ward