None of CDR/DVD drives report C2 errors. Is this something I can enable or is there some hardware/software shortfall? How important is this feature anyway? Drives in question are LG GCE-8520B, Yamahas CRW-F1, 6416s and Pioneer DVD-106S
The ability to correct c2 errors when extracting audio is VERY important. The LiteON LTD 163/165/166 dvd-roms all have the ability to correct c2 errors and produce superior dae quality, not to mention blazin fast dae speed. Shoey
Shoey, Actually most drives do not have accurate C2 error detection, so relying on it is less secure than using EAC's secure mode. This stuff is for the audio forum.
. I disagree. The 4 drives I've purchased in the last 2 years all have the ability to correct c2 errors. Shoey
Anyway, this discussion should be moved to the Audio forum (or forums will turn into a mess). (topic closed)
Moved and re-opened. Many drives have C2 error reporting, yes. But hardly on hardly any drive does it work accurately. A lot of research has been done on C2 features of CD drives, especially by Andree Wiethoff (maker of EAC).
But what exactly do these errors tell us (and how)? In my last thread I asked if there was an article I could be pointed to. I'm not a boffin but I would like to know how to get the best out of my equipment, I'm that serious at least.
I don't dispute this fact, however, the abilty of a drive to correct c2 errors, especially dealing with scratched audio cd's does help. Shoey
C2 error correction is performed by any drive, it is part of the basic Red Book specifications. What EAC deals with is drives capable to tell if the C2 error correction has failed or succeeded. From EAC's FAQ : Q: What is C2? A: On all CD-ROM media are at least two levels of error correction, called C1 and C2. If both fail, the output is probably not correct anymore. Most drives are not able to report if audio reads failed or not, so each block had to be read twice and be compared to make sure that everything is fine. But some newer drives are able to report if C1/C2 failed on specific samples on a read, making it possible to read only once and see if a read error occured. But there is still a problem, as some drives do not report these errors correctly, so you should test it thoroughly before trusting the results. ____________________________________ An explanation of the two C2 checkboxes in EAC's drive options : http://www.digital-inn.de/showthread.php?threadid=15572 You can test the C2 accuracy of your drive with the DAEQuality kit : http://www.exactaudiocopy.de/eac13.html But beware than the C2 accuracy itself can vary according to the testCD : http://www.digital-inn.de/showthread.php?threadid=14640#post60894 There can be CIRC strategies more efficient than others to perform C2 error correction, that would perfectly fit your description, Shoey, but they are very little discussed. I made a webpage about their detection : http://perso.numericable.fr/laguill2/dae/dae.htm (Very advanced stuff...) Other links about C2 : http://www.digital-inn.de/showthread.php?threadid=15921 http://www.digital-inn.de/showthread.php?threadid=14600
I just dig up a much better thread, that summarizes EAC's securenes in the different secure modes : http://www.hydrogenaudio.org/index.php?act=ST&f=20&t=7277&
I doubt very much that LG 52x can't report C2 errors. The LG32x, 40x and 48x are able to do it. Go to "Test Device" in Program Parameters menu in Feurio CD-Manager, and the drives features will be showed (C2 errors reporting, always according to drive: I mean the drive can lie). Enable "Report C2 errors" only in the C2-error-message tab in the "Special Parameters" menu of the drive. Try to rip a scratched CD in the CD-Manager at high speed and you'll get C2 errors. You'll have to disable "read index marks" probably...
