I can't get audio speakers 5.1 option listed on windows playing devices.
Neither on HDMI neither on SPDIF.
I already tried many ways to try that option come alive: Use Realtek HD audio driver provided in the cd with the board, download the driver from Asrock website, latest driver from realtek website and even a Gigabyte audio driver that i know that work because i own one - GA-E350N-USB3, that have the same audio processor (Realtek ALC892)
Tried already a fully fresh Windows 7 64bits install, and with nothing installed but the drivers, no 5.1 option either.
I think because of this problem, the utility you provide "THX TruStudio" don't work properly either.

Any help will be much appreciated!