Warbly sound in Majora's Mask?

I absolutely love this texture pack, and the game itself seems to run pretty smoothly with the exception of a few seconds when changing areas, but I've noticed the audio has a slight warble, as if it's lagging. Is there any solution to this? I noticed there aren't many options under audio in the emulator, and when I uncheck the box for audio stretching it seems worse. Thanks!