What type of sound card do you have? And what type of output? Right now I'm using an onboard Realtek. It gives me the option to select the "default format" for my any output (digital/HDMI/speakers) which includes 24/96. I'd be surprised if you didn't have this ability, the Realtek codec on this board is pretty old, I think. Maybe a driver/codec update is needed?

Good find on the NIN! I'm downloading it now, thanks a bunch for bringing this to my attention \:\)