What computer sound card for my system

Do i need a special sound card to get 5.1 with a digital or coaxial out? or can i just buy the adaptor that goes from headphone jack into 2 RCA's and get that sound?


Ive been lookin at some sound cards but not sure what to do. I am getting Onkyo TX-SR502 that has 1 coaxial and 3 digital inputs.


So my main question is... Will i get 5.1 (5.1 is good enough for computer and for now i only have 5 speakers) with a normal output if the sound card supports it by the adaptor or do i need the coaxial or digital outputs


Also, if using the digital output on Creative Labs® Sound Blaster® Live!™ 5.1 Dolby Digital PCI Sound Card, How would i connect that to my reciever.. Onkyo TX-SR502, the adaptor?




thanks, and sorry about like 20 questions in there