Not getting any in-game sound in Super Mario Sunshine.

[Stevis]

It's been a few months since I messed around with Dolphin, so I really don't remember if it was doing it before, but when playing Sunshine, I get no sound outside of the FMVs. I've been looking for some option that would fix it but I have no clue.

I'm using the 64-bit R2962 SVN build (when I run it, it shows as R2915, don't know why) in Vista x64.

Any ideas?

Edit: I have a Core 2 Duo E8400, 512MB 8800 GTS, and 4 GB RAM.