What does "Error Checking" mean in CD-R Duplication?

Franco · 22nd December 2008

Can anyone tell me what sort of error-checking is performed by CD-R duplicators?

I'm curious to know how sophisticated this sort of feature actually is, especially for machines that promise really fast dups. The descriptions I've found online for most of these machines are pretty vague.

Adam Dempsey · 23rd December 2008

CD-R duplicators, rather than replicators? Best to ask. Especially if testing at one read speed then replicating at another. Results may also depend on the firmware of their machines - at least this used to be an issue. I'd be surprised if many duplication-only places had error checking facilities. If so, it would pertain to checking of correctable and uncorrectable (CU) errors on the read of the master disc. Ideally it would also involve checking conformance to the relevant Sony/Philips book (red, orange, yellow, blue..), disc reflectivity, pit geometry & jitter, but you get that only with replicators using full Eclipse systems, and even then their pass marks ('rules') will vary.

finetuner · 23rd December 2008

Some more info on error correction is found over here :

Technical requirements for delivering CDs to manufacturing plants

Coyoteous · 23rd December 2008

Testing duplication masters and product (duplicas? ;-) will vary greatly - from no checking of either to the same stringent ISO guidelines often used for replication. The plant I work for does both duplication and replication, and they use the same testing for both - CD Associates, Datarius, and good ole Plextools Pro - like most of you guys use. They also build custom duplication systems for other duplicators, most of which do no testing at all. Good duplication controllers do a fair amount of rudimentary testing that is often transparent to the user.

22nd December 2008	#1
Franco Lives for gear Join Date: Jun 2006 Location: Not working on music, which is were I SHOULD be. Posts: 1,159 Thread Starter Verified Member	What does "Error Checking" mean in CD-R Duplication? Can anyone tell me what sort of error-checking is performed by CD-R duplicators? I'm curious to know how sophisticated this sort of feature actually is, especially for machines that promise really fast dups. The descriptions I've found online for most of these machines are pretty vague.

23rd December 2008	#2
Adam Dempsey Lives for gear Join Date: Jan 2007 Location: Melbourne - Australia's music capital. Posts: 1,633 Verified Member	CD-R duplicators, rather than replicators? Best to ask. Especially if testing at one read speed then replicating at another. Results may also depend on the firmware of their machines - at least this used to be an issue. I'd be surprised if many duplication-only places had error checking facilities. If so, it would pertain to checking of correctable and uncorrectable (CU) errors on the read of the master disc. Ideally it would also involve checking conformance to the relevant Sony/Philips book (red, orange, yellow, blue..), disc reflectivity, pit geometry & jitter, but you get that only with replicators using full Eclipse systems, and even then their pass marks ('rules') will vary. __________________ Adam Jack the Bear's Deluxe Mastering facebook \| twitter \| myspace Is adding presence the same as subtracting absence?

23rd December 2008	#3
finetuner Lives for gear Join Date: Jan 2007 Location: Netherlands Posts: 868	Some more info on error correction is found over here : Technical requirements for delivering CDs to manufacturing plants __________________ Peter van 't Riet FineTune Mastering

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23rd December 2008	#4
Coyoteous Lives for gear Join Date: Aug 2006 Posts: 4,131	Testing duplication masters and product (duplicas? ;-) will vary greatly - from no checking of either to the same stringent ISO guidelines often used for replication. The plant I work for does both duplication and replication, and they use the same testing for both - CD Associates, Datarius, and good ole Plextools Pro - like most of you guys use. They also build custom duplication systems for other duplicators, most of which do no testing at all. Good duplication controllers do a fair amount of rudimentary testing that is often transparent to the user.