Hi, I've studied sound engineering and am now studying acoustics. So I will help where I can, I may be being stupid but firstly what is sq? And secondly what is kx?
In order to attempt to answer your question ASIO (Audio Stream Input/Output) is a standard method for processing digital audio and is not available in windows vista (they changed it to their own power hungry version). It is found in XP.
If you are wanting to output ASIO to your amp then you would need a compatible sound card e.g. the Audigy you mentioned, this would either go through Optical ADAT or S/PDIf (the two coax plugs). Looping this back into your sound card will not help at all this will create feedback! If it is simply an output you want then just take the standard line level output from the sound card.
I hope this helps, I couldn't really understand what you wanted so if I'm way off please reply.