Logitech X-540 Computer Speakers "try play game input supported" Questions

try and play anything music,sounds etc it only uses the sub front 2 speakers and the center speaker. I am currently using a Auzentech HDA Xplosion 7.1 audio card there is also realtek audio on my comp

...game adapter it comes with connects to the green port, which is the front speakers, which is what makes it so strong. So I think buying a converter from the Green, Orange, and Black inputs to ...