I wasn't referring to anything other than 1x speed, nor was I referring to MP3. Only a fool would even waste time burning a CD-R at over 1X speed, IMO...........................Joe: You know what? I don't feel like explaining why. If you make lots of copies, and hear no difference, that's fine with me. Be happy, go forth and populate the earth with perfect CD-R's. I never said there was a big difference, just that they don't sound exactly alike to me. I have a few things I am trying that might futher lessen the difference, but I have too many cables and speakers that I am reviewing to waste time wondering why a copy wouldn't be EXACTLY the same as the original. PERHAPS YOU CAN TELL ME WHY A COPY IS IN EVERY WAY, EXACTLY THE SAME AS THE ORIGINAL? (since you want to discuss it).