Yes there is, No I am not him and I am sure you'll find him
I posted a while ago about the 5.1MT volume control
My understand is that SPDIF can not be controlled by mobo so you will have to use the amps power supply. I am sure you know that the 5.1MT has an onboard decoder and also a IR remote with a IR eye on wire so you can install it somewhere that the remote will be able to "see" the eye. All volume and other functions of teh amp (test tones gains ect) are controlled by this remote. Also if you are usinga screen considering wiring the amp to the screen as it dispalys info to an LCD.