I've got an ASUS A7N8X-X motherboard (nForce 2) with a Realtek Sound Card and was struggling to get the rear speaker channels working. I had some success with changing the realtime SPDIF option in the older drivers but after a restart it reverted to stereo again. Found this updated driver on one of RealTek's far eastern FTP sites, but sorry I don't remember the link. Basically this driver works like a charm! Enjoy!
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