Just hooked up my PC to my AX5i via the USB input. Doing a comparison between MP3 tracks played back via the PC USB connection and from the 868 (with same tracks burnt to CDR) via the phono and iLINK connections results in no noticeable difference. What a result! That means I don't now have to burn 30GB of MP3 to CDR. Granted the quality isn't as good as CD but it's ideal for parties, etc. when you just want to compile a playlist of songs and let it run for the rest of the night.