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In Reply to: Copied CD's sound inferior to originals. posted by Peufeu on September 11, 2000 at 06:10:13:
> Copied CD's sound inferior to originals.
Tubes sound better than SS. Granny Smith apples taste better than Golden Delicious.
It all depends on implementation and taste.> All this with no green paint on the CD, no blue LEDs, no snake oil.
No blue leds? Shame on you!!! :D
> Is it too much to ask a $1000 transport to do the job of a $60
> CD-Rom reader ?No, not on the original disc, *but* the $1000 transport reads a whole other disc, the copy...
> I'd like to hear from your experiences with copied CDs.
> Thank you.AFAIKS, you left out two details:
1) the (perfectly extracted) data must now also be *written* perfectly. From an inside scoop I heard that many standard grade burners have a high BER (bit error rate). Most errors can be fixed at reading, but the quality of that depends on your transport and chipset.
A guy at Philips told me that for the stand alone audio recorders, a whole new transport was developed with a 10x lower BER than the transport in the data recorders. That would explain my positive experiences with them (then again, *bias* would also explain it :)
2) the (perfectly extracted, maybe not perfectly written) data are now on a 70% reflecting disc (CDR) instead of 95% (silver). Some transports make more errors on those. Then again, some make less errors. At least a recorded disc has perfectly centered data, since it was written instead of pressed. This saves a lot of work for the tracking servos. A german magazine reported that some copied CDs sounded *better* than the originals. They explained it by some jitter phenomenon: the recorder retrieves the data clock using a PLL and when the original disc had *bad* timing, the PLL clock might do a little better.
My experiences are that some CD copies definitely sound worse (e.g. Eric Clapton - Unplugged) some sound better (e.g. Cranberries - Bury the hatchet), many sound bad from the start and don't get any better or worse, but all are cheaper :)))
Regards,
Remco
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Follow Ups
- Re: Copied CD's sound inferior to originals. - rmsaudio 09:57:34 09/11/00 (0)
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