I want to use my 5.1 setup to get surround sound in games. I have a SBLive Value card(with digital out)and a Pioneer VSX-D510. The receiver has 2 digital inputs(one optical, one coaxial) and a 5.1 analog input. I don't think the digital connection would work for surround because most games using EAX 4 point surround and not Dolby Digital or DTS. Could I use the front and rear speaker output from the soundcard instead?