I hope I know the answer to this one, but I'd like confirmation...
Lets say a friend of mine ripped a bunch of cds with a ripper other than either Feurio or EAC, then burned these cds with a crappy old Yamaha burner. Lets also say this friend hadn't invested in a CD drive with proper C2 error reporting during that time.
Eventually, this friend of mine got interested in why so many of these CD to CD copies sounded like shit, and started ripping with EAC and bought a LTD-163D to test the burn quality, and a rebadged Plextor to do proper burns.
Naturally, he found that many of his pre-EAC, Yamaha rips had errors all over the place when tested. This friend also found that many of these "olde-tyme" cds did not have errors.
The "100 million hours of labor" question for today is: can those non-error infested CDs be considered "secure"? Will errors not fixed in the ripping stage of a CD copy be detectable in the final product... ie, with these CD Speed scans I'm (errr, I mean, my friend) doing? Or are C2 errors on a disc only created by a bad burn?