So I've noticed on my system that on some unity games I encounter an annoying audio bug. Usually while a lot of sounds are played the sound goes distorted and speeds up. This constantly dogged me while playing Gone Home, especially of extended periods. I would have to exit to the menu and go back in. Has anyone else had this problem and know any fixes?

I'm running Linux Mint 64x KDE edition
ADM 6xxx HD graphics with the latest stable proprietary drivers
I get my sound via HDMI, if that matters.