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From: jlg@lanl.ARPA
Newsgroups: net.audio
Subject: Re: question about whispering ghosts
Message-ID: <18457@lanl.ARPA>
Date: Fri, 21-Dec-84 17:04:42 EST
Article-I.D.: lanl.18457
Posted: Fri Dec 21 17:04:42 1984
Date-Received: Sun, 23-Dec-84 08:02:09 EST
References: <165@unc.UUCP> <55100064@trsvax.UUCP>
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Organization: Los Alamos National Laboratory
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> 
> 
> If the sound ghost comes exactly 1 revolution of the record early,
> it's very unlikely it's the tape.  It's probably the grove
> distortion.  If it is not exactly 1 revolution early, then it 
> came from somewhere in the mastering process, probably tape printthru.
> 
> mikey at trsvax

Don't sit close looking at your records, time them.  If the ghost is 1.8
seconds (1 min/33 rpm) before the correlated signal, then the record
pressing is at fault.  If it isn't, then tape mastering is probably the
culprit.  Most cases I've seen are caused by tape mastering (in fact, they
usually are re-releases of older performances which have probably been
archived on tape for several years - the tape blead-thru problem gets worse
with age).

Of course, depending upon the diameter of the tape reel, tape ghosts could
also be delayed exactly 1.8 seconds.  This is unlikely though.
------------------------------------------------------------------------------
The greatest derangement of the mind is to believe in something
because one wishes it to be so - Louis Pasteur

                                              James Giles