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Article #1143

Re: Audio quality of CDR, any theory ????

#1143
From: Arny Kr�ger
Date: Tue, 15 Dec 1998 00:00
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Lee HC wrote in message <01be27ef$aff52c20$LocalHost@default>...
>

>If the digital output from a CD Drive is as simple as the "0" & "1", then
there shouldn't be difference of the sound come out from
>a Discman (with digital out ) & the ultra-expensive state-of-the-art CD
drive. In the early day of release of CD, some scientific
>prediction is no need for expensive CD front end for play back of CD disc.

It turns out that this is an incorrect presumption. It is possible to measure
a digital output and determine whether it is a perfect bit copy of the input.
Such investigations show that some digital outputs are exact, and others are
not.

Here is an example of the performance of a system with exact digital input and
output:

http://www.pcavtech.com/soundcards/baseline

Here is an example of the performance of a non-exact digital input but one
that has high quality:

http://www.pcavtech.com/soundcards/ADA1000/48-44/

Here is an example of the performance of a non-exact digital input but one
that has far lower quality:

http://www.pcavtech.com/soundcards/ct462044/index.htm
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From: "Arny Kr�ger" <arnyk@flash.net>
Subject: Re: Audio quality of CDR, any theory ????
Date: 1998/12/15
Message-ID: <CUqd2.2714$Bc5.6097@news.flash.net>
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