https://bugs.winehq.org/show_bug.cgi?id=42594
--- Comment #2 from intosamadhi@gmail.com --- (In reply to winetest from comment #1)
Console output while you are trying to do this?
The problem was resolved after changing the way my hard drives were being mounted in fstab (explicitly setting uid and gid for the mounted drives). No idea why, but since then wav files have been working.