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Path: utzoo!watmath!watcgl!dmmartindale
From: dmmartindale@watcgl.UUCP (Dave Martindale)
Newsgroups: net.audio
Subject: Re: hearing songs before they start
Message-ID: <3009@watcgl.UUCP>
Date: Fri, 24-Aug-84 22:25:32 EDT
Article-I.D.: watcgl.3009
Posted: Fri Aug 24 22:25:32 1984
Date-Received: Sat, 25-Aug-84 07:47:31 EDT
References: <2197@sdccsu3.UUCP>
Organization: U of Waterloo, Ontario
Lines: 14

This is always due to some tranfer of signal from the part of the
physical media (tape or disk) where it is supposed to be to a part where
it isn't.  It can appear either before or after its correct place in time.

If you are playing a record, note the rotational position of the disk
at the point you hear the faint sound, and then when you hear it where
it is supposed to occur.  If the pre-echo (neat name eh?) occurs exactly
one revolution before the real sound, then the problem is due to the signal
in one groove distorting the groove walls of the preceding groove.

If the offset in time isn't one disc revolution, then the effect is most
likely due to print-through on the magnetic tape used at some point in
the recording process.  The offset in time in this case is one revolution
of the reel of tape.