🚀 go-pugleaf

In article <F308098DC0C8DC2F.31FD14AE39298D33.674812088DCBAA2A@library-
proxy.airnews.net>, Chung <kclee@hk.gin.net> writes
>Could you made sure your CD reader could 100% read the CD without
>error?  If yes (ie.100% correct),

Yes, because the CD reader has error correction when can fix the errors
during reading.

> why there are so expansive CD
>transport on selling? 

You pay more for a higher quality playback sound. That doesn't matter
what type of CD you're using.

> If No (have error), than even CDR 100% correct,
>It still have error signal Recorded, then sound different.

That would be correct; but the CD reader corrects all of the errors when
reading the disc.

>Audio CD format has no error correction such as the "Check sum" of
>Computer CD ROM. 

Yes it does. Using a checksum is only necessary for computer data where
a high degree of reliability in reading must be guaranteed. The
correction system used by audio CD is good enough for audio CD playback.

> So, even error, the transport (or reader) don't know
>and will no correction made.  Only the DAC will check for reasonable
>signal and correct it.

In a CD player the error correction is done in real time immediately
before the DAC.

>I have tested it before. It is a big different, which no need AB
>repeat comparing.  It's quality similar to the cheap illegal CD clone.

-- 
        Brendan Heading
http://www.heading.demon.co.uk (updated every Thursday)
ICQ : 24010538
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"The appeal to patriotism is the last refuge of a scoundrel"