Hey guys I have had my X-Mystique since they came out and have been using the x64 driver from the HDA website ever since it was released around 6 or so months back. I have had some dissapointing surround effects using these drivers (oblivion etc) I recently found another company called Auzentech which seems to distribute HDA merchandise in the US. Their drivers page has MUCH newer 64 bit and even 32 bit drivers for both the X-Mystique and the new X-Plosion cards. Using the latest x64 drivers on there, Oblivions surround is now perfect for me! Apologies if this is old news, i did a quick search and couldnt find anything. Anyways, heres the link. http://www.auzentech.com/downloads.html I know they technically sell products OCuk sell, so if this is breaking the rules please let me know. They do seem to only distribute in the US though, so hopefully it'll be ok.