The process is fairly simple, download this package and extract the folder inside the archive… open said folder and browse to “ASUS_BlackHawk_v41\ASUS Driver\amd64\Vista”, even if you aren’t running Vista, this will work (at least on XP x64)… open the ADIHdAud.inf file in notepad or your favourite text editor and locate line 79:

%HdAudioFunctionDriver.ADICodec.DeviceDesc% = A1988P,   HDAUDIO\FUNC_01&VEN_11D4&DEV_198B&SUBSYS_1043829B

Now, replace that line with these two lines, basically commenting out the first one while placing a modified version (bold) of the first line in place of it:

;%HdAudioFunctionDriver.ADICodec.DeviceDesc% = A1988P,   HDAUDIO\FUNC_01&VEN_11D4&DEV_198B&SUBSYS_1043829B
%HdAudioFunctionDriver.ADICodec.DeviceDesc% = A1988P,   HDAUDIO\FUNC_01&VEN_11D4&DEV_198B&SUBSYS_104381F2

You are simply letting Windows know that your device’s subsystem is compatible…

At this point you should be able to load up device manager, find your Soundmax audio device, right click, update driver, install from specific location, next, choose search in specific locations, uncheck the first box, check the second box, specify the location of the file you just edited and click next.

Voila.

It’s working perfect for me, but do this at your own risk — if your head explodes, it’s not my fault.