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-   -   Portable CD player as a transport !? (http://www.diyaudio.com/forums/digital-source/27056-portable-cd-player-transport.html)

GregGC 28th January 2004 09:36 PM

Portable CD player as a transport !?
 
Excuse my total lack of knowledge on the subject.
I know it sound crazy. The reason I thought of it was the 30-40 sec. anti-shock buffering they do. Doesn't that eliminate jitter? As far as the analogue section, no idea, and the actual transport probably bad too. Any way, No mater how crazy the idea it'll be interesting to elaborate on it. Again the 30 sec. buffering got my attention. If that offers any advantages, can it be implemented in a normal CD transports?

Thanks
Greg

maczrool 28th January 2004 10:38 PM

Portable CD players compress in some sort of lossy codec that degrades the sound. It has to be decoded before sent out of the player. Jitter is purported to be higher with the buffer turned on.

Stu

GregGC 29th January 2004 02:25 PM

Quote:

Originally posted by maczrool
Portable CD players compress in some sort of lossy codec that degrades the sound. It has to be decoded before sent out of the player. Jitter is purported to be higher with the buffer turned on.

Stu


Thanks a lot.

Richard C 29th January 2004 02:42 PM

ALL cd players buffer the data from the disc, jitter isn't caused by variations in disc speed.

maczrool 29th January 2004 06:04 PM

Quote:

ALL cd players buffer the data from the disc, jitter isn't caused by variations in disc speed.
Yes, but the anti-skip in portable units is what enables the compression and higher jitter. The motor "kicking in" is also a cause of noise (jitter) in the digital output.

Stu

Benjlv 30th January 2004 02:44 AM

if you notice on some players there is a option for no antiskip...some anti skip and a mess of it.

Its possible that these players may not use compression in the lower anti-skip levels. would look into it.


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