The Beosound don't play MP3 nor the Lossless format to my knowledge.
The only way to get it to play MP3 or lossless is to convert them to the redbook format on a CD?
Otherwise connect your MP3 player to the AUX input using a DIN->RCA adapter.
-Andreas
BLab5, BLab5000, BLab8000, BV10, BS9000, BS3, Beo5, Beo4, BLink1000, BLink5000, BLink7000, A2, A8, Form2