Motherboard GPU Features & Benefits

High Definition Audio (HDA)
High definition audio brings consumer electronics quality sound to the PC delivering high quality sound from multiple channels. Using HDA, systems can deliver 192 kHz/32-bit quality for eight channels, supporting new audio formats.
Yes, it supports 3D sound. Go to your nVidia Control Panel and tinker around in there with the sound and see if you can get it set up. But that's as far as I can help you...