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From: rmd@hpcnoa.UUCP
Newsgroups: net.audio
Subject: CD defect
Message-ID: <30200020@hpcnoa.UUCP>
Date: Mon, 30-Jan-84 22:32:00 EST
Article-I.D.: hpcnoa.30200020
Posted: Mon Jan 30 22:32:00 1984
Date-Received: Wed, 8-Feb-84 03:10:13 EST
Organization: Hewlett-Packard - Fort Collins, CO
Lines: 28
Nf-ID: #N:hpcnoa:30200020:000:1212
Nf-From: hpcnoa!rmd    Jan 30 19:32:00 1984

Here's some ammunition for CD foes:

I bought a CD recently with an audible defect which cannot be removed by
cleaning.  The  defect is clearly in the CD itself and not in the master
because it does not always appear at the same place in the music.

The defect is a band of very small  bubble or dust  particles  in the CD
near the outer  portions  of the  music.  The band is about  1/8th of an
inch wide and is straight,  intersecting the disc tangentially.  It is 2
or 3 inches in length.

The  audible  result  sometimes  sounds  like a brief tape  dropout  and
sometimes sounds like a low-level 'pop' on a LP.

The CD  player is a CDP 101,  which of course  has only  mediocre  error
correction  characteristics.  A better CD player might very well be able
to play this CD with no audible problems.

My conclusion is that error correction  ability is more important than I
had   previously   thought.  We  can  only  expect  the  quality  of  CD
manufacturing  to go down as the volume  increases.  Even on this  disc,
the  defect  is not as bad as the pops and  scratches  on LPs, but it is
enough to be irritating.

Anyone have any constructive comments or similar experiences?

Rick Dow
inhp4!hpfcla!rmd