I've noticed more sibilance and high-freq noise with some mp3's burned to cd when compared A/B to the original. Not all though. Also some seem to be, I don't know, drier. I rip at 320. Now with mp3 files on cd, I can hear quite a difference, like the atmosphere has been sucked out of the music.

"There's too many notes!" M22ti VP150 EP350 QS8 AVR-2805 SCD595 Panasonic DVD-S35