Correct. MP3 is a different and inferior quality recording. They compact the information which in turn makes the music less dynamic. On a good system, you can easily hear the difference. With our BOSE, it isn't as noticable. I play an IPod on mine, which is MP3 and it doesn't sound to bad, but manufacturer burned disks are definitely better.ksolo83071 said:hullio, there is a big difference between burning a disc in mp3 format and burning it in audio format on a blank cd-r/cd-rw. the major difference is that you can fit 8 to 9 FULL ALBUMS in mp3 format and only about 15-20 SONGS in audio format. so i think that was his question. answer is no for the 04-05 models. 06 models, i've heard yes.