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as I said that site's information is incorrect. Here are links to the real CD Red Book and DVD formats.

Posted by Teresa on December 23, 2005 at 18:21:13

In Reply to: Re: What you quoted was incorrect as I have proven. These are not the specs for any Disc format. posted by Martin419 on December 23, 2005 at 07:55:52:

You are being confused by Disc Thickness which is 1.2mm for CD, DVD-Video, DVD-Audio, SACD, etc. and Tolerance which is +0.3, -0.1 mm. This links will help you understand better.

Here are links the real specifications from the CD Red Book Audio Standard:

Thickness: 1.2 mm - Tolerance +0.3, -0.1 mm

http://www.deluxemedia.com/support/cdtech/cdaudio/cd_specs.xml
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The main parameters of the CD (taken from the September 1983 issue of the compact disc specification) are as follows:

Scanning velocity: 1.2–1.4 m/s (constant linear velocity) - Equivalent to about 500 rpm at the inside of the disc, or about 200 rpm at the outside edge.
Track pitch: 1.6 μm.
Disc diameter 120 mm.
Disc thickness: 1.2 mm.
Inner radius program area: 25 mm.
Outer radius program area: 58 mm.

http://en.wikipedia.org/wiki/Compact_disc
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DVDs use a substrate that is 0.6 mm thick, compared to 1.2 mm used in CDs , thus reducing the effect of this degradation due to disc tilt by a factor of 2.

A 0.6 mm substrate is not physically strong enough, and so it is necessary to bond two 0.6 mm substrates together to form a 1.2 mm substrate. This adds a bonding step in addition to the steps that are required to form the 1.2 mm substrate used in CD media.

http://www.pioneer.co.jp/crdl/tech/dvd/2-e.html
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Dual Disc Manufacturer warnings
A number of electronics companies such as Lexicon [11], Marantz [12], Mark Levinson [13], Onkyo [14], Panasonic [15], Pioneer [16], and (ironically) Sony [17] [18] have issued statements warning consumers about possible problems with playing DualDisc titles on their equipment. These warnings range in severity from DualDiscs just not working with the equipment to actual damage to the disc and/or equipment.

http://en.wikipedia.org/wiki/DualDisc

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Martin also check out the 45,500 DualDisc warnings I provided. DualDisc is a defective format and you are the fool putting them in your DVD-Audio player. Unlike you I actually put ONLY Real DVD-Audios in my DVD-Audio player.

Teresa

• Google search 45,500 for DualDisc Warnings   (Open in New Window)

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