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ARSCLIST  February 2004

ARSCLIST February 2004

Subject:

Re: CD Player Question

From:

Jerome Hartke <[log in to unmask]>

Reply-To:

[log in to unmask]

Date:

Fri, 6 Feb 2004 12:15:28 -0800

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (26 lines)

Dale Francis wrote:
>
> with the cd having three layers of error correction, getting a player
> which accurately reads the data and transcribes it with a minimum of
> error and coloration from the digital and analogue circuits seems to me
> to be an audio goal.  the cheap players compromise this. saying that
> the "listener" does not need this accuracy is comparable to not washing
> the record before playing or not aligning tape heads because "it really
> doesn't matter."
> Dale
> [log in to unmask]
> www.longrunaudio.com

Audio CDs have two layers of error correction. Data discs have three.
Even two layers is more than adequate to correct errors from the discs
themselves. All players contain a chip that performs these corrections.

Not all errors are "on the disc." Severe, uncorrectable errors can be
generated by mistracking in the player. This can be traced to cheap
hardware. It can also result from the use of discs having capacities in
excess of 74 minutes, since these often have small values of track pitch
that are out of spec.

Jerry
Media Sciences, Inc.

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