So, there's this CTF level by Ragnarok: http://www.jazz2online.com/downloads...k-of-serenity/

It uses a .mo3 file as the music (as suggested by me ) which requires JJ2+ and BASS. Until recently, it played in-game without any trouble (i.e. exactly as in Modplug). Then I switched to Windows 7 and while it's fine in Modplug, the playback in JJ2/BASS is absolutely broken. Updating BASS didn't do much given how I already had the latest version.

Any ideas?