Originally posted by nealh
interesting for me my ltd 163 finds errors that my o/ced 40x does not…
You have to keep in mind that the errors are a combination of reading AND writing. A writer could write a disk whose pits are not as clean as they could be, and one reader may do a better job of reading it than another, while another WRITER could write better, so that both readers read it well.
For example, on my 40125s, writing audio CDs on crap CMC media, using WSES to ananalize the errors after burning, I get a ton of errors, but if I write at 16x, they are quite acceptable. BUT, if I tell WSES to limit READ speed to 16x, both the 16x written discs AND the 24x written discs have very decent error rates (not great, but decent). At the slower speed, it has a better chance of intrepeting the less than perfect pits.
Logic would tell you that if reading at 16x vastly reduces the amount of errors that are read, then burning at 24x must be fine, since my audio CDs will only be read at 1x anyway… but that’s not true. Since the writing at 24x is of lower quality than writing at 16x, based on the higher error rate when read at full (40x) speed, then there’s a chance that my car CD player, which may or may not be able to read as well as the lite-on, and is having to do it while I’m driving over bumps, is going to have a better chance of producing perfect performance with the higher quality write that I can get at 16x. Just like Yamaha does with their special audio mode that stretches the tracks out, with the intent of reducing jitter… even though the Yamaha can write audio CDs fine with that mode turned off, there’s a chance that the end result is better with it on, as it gives the reader a better chance of capturing the bits as they should be.