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Halcyon · 17-12-2002

This is an interesting discussion.

I've been following the CDR Info measurements as well.

Couple of points I've considered.

1) Their results are relative and can only be compared to other drives they've tested with the exact same methodology (it has changed once or twice during the time they have run the DAE quality / C2 error tests)

2) Pressed C2 errors are only data level errros. Most real life C2 errors are physical level errors. To read these properly the transport, pick up and servo also matter a lot. Even reading the same spot twice might produce unreadable and readable results on the two occasions (this is what EAC uses too).

3) Could we have a STANDARD physical layer error disc (not just data layer) that had scratches of several levels of severity. This would not only test the C2 ability, but also the pickup/servo/transport performance. As such it would be a much better approximation of real life performance with scratched discs.

Comments?

regards,
Halcyon

PS In a way I hope that we are discussing the remnants of a dying standard which will hopefully be supplanted by SACD/DVD-A or something else... Redbook implementation has way too much black magic associated with it to be a contender for a reliable standard in audio delivery in the 21th century, imho.

17-12-2002	#8
Halcyon Registered User Member Deluxe Join Date: Feb 2002 Location: Some say there is no hope, some say no U.F.O. Posts: 246 Abgegebene Danke: 0 Erhielt 0 Danke für 0 Beiträge	This is an interesting discussion. I've been following the CDR Info measurements as well. Couple of points I've considered. 1) Their results are relative and can only be compared to other drives they've tested with the exact same methodology (it has changed once or twice during the time they have run the DAE quality / C2 error tests) 2) Pressed C2 errors are only data level errros. Most real life C2 errors are physical level errors. To read these properly the transport, pick up and servo also matter a lot. Even reading the same spot twice might produce unreadable and readable results on the two occasions (this is what EAC uses too). 3) Could we have a STANDARD physical layer error disc (not just data layer) that had scratches of several levels of severity. This would not only test the C2 ability, but also the pickup/servo/transport performance. As such it would be a much better approximation of real life performance with scratched discs. Comments? regards, Halcyon PS In a way I hope that we are discussing the remnants of a dying standard which will hopefully be supplanted by SACD/DVD-A or something else... Redbook implementation has way too much black magic associated with it to be a contender for a reliable standard in audio delivery in the 21th century, imho.