http://bugs.winehq.org/show_bug.cgi?id=22691
--- Comment #5 from A Wine user RandomAccountName@mail.com 2010-05-17 18:11:07 --- I usually use WAV for testing. They have a list of supported formats here:
http://cdburnerxp.se/help/Audio/formats
Last time I checked, MP3 support was broken in Wine, and WMA worked (if WMP9 is installed). I've never tried using the other formats listed there.