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> -----Original Message-----
> From: Association for Recorded Sound Discussion List
> [mailto:[log in to unmask]] On Behalf Of Bob Olhsson
> Sent: Thursday, December 07, 2006 11:41 PM
> To: [log in to unmask]
> Subject: Re: [ARSCLIST] The ways CD's and DVD's can fail.
> 
> Jerome Hartke wrote:
> >Quantitative test results are evaluated in accordance with the
> appropriate
> >ISO standard.
> >
> >How do you define "far less reliable"? This sounds rather qualitative.
> 
> Around one in twenty have been bad. Sounds like this ISO standard is
> pretty misleading.
> 
> --
> Bob Olhsson Audio Mastery, Nashville TN
> Mastering, Audio for Picture, Mix Evaluation and Quality Control
> Over 40 years making people sound better than they ever imagined!
> 615.385.8051    http://www.hyperback.com

Two comments:

1. Although your statement that a few discs are "bad" may be sincere, it is
not very quantitative. Your player could have problems, or all the discs may
be "bad" and one in twenty is just worse than the others.

2. I fail to understand how you can propose the ISO standard to be
misleading. It is the only quality benchmark that we have, as there are no
public standards for write and read drives.

ISO standards are very comprehensive, even specifying the characteristics of
the test drive. If a disc does not conform to the standards, then it is an
unacceptable disc even if it "plays" in one or a few drives. If a disc
conforms to the standards, then the drive is at fault upon a malfunction.

Jerry
Media Sciences, Inc.