Re: [ARSCLIST] Longevity

[Jerome Hartke <jhartke@xxxxxxxxxxxx>]

Moving away from opinions, our testing laboratory has conducted tests on
both CD and DVD discs containing such defects, both of our own fabrication
and obtained from Philips Laboratories. Results are as described in my
initial contribution.

Simple fingerprints should never interfere with playback unless the read
drive is of very poor quality. The real risk of fingerprints is in the oils
from the body. Those of each person are distinct, and some can degrade discs
over an extended period of time.

Jerry
Media Sciences, Inc.
http://www.mscience.com/

> -----Original Message-----
> From: Association for Recorded Sound Discussion List
> [mailto:ARSCLIST@xxxxxxx] On Behalf Of Alex Hartov
> Sent: Sunday, July 02, 2006 5:58 PM
> To: ARSCLIST@xxxxxxxxxxxxxxxx
> Subject: Re: [ARSCLIST] Longevity
> 
> That is part of the hype.  You try it.  I know from experience that a
> simple finger print will mess up playback on either CD or DVD.  I
> don't know where the notion of a whole in the CD/DVD being
> recoverable comes from but it's definitely nonsense.
> 
> Alex
> 
> 
> On Jul 2, 2006, at 5:31 PM, phillip holmes wrote:
> 
> >> CD and DVD error detection and correction algorithms will "play"
> >> discs with
> >> 2 mm diameter holes. Some DVD systems require a 6 mm defect before
> >> data loss
> >> occurs, and the problem is then loss of servo lock by the read
> >> drive. Can
> >> 78s do this?