NEED HELP - 5.1 Surround sound system

[Jordan B]

I just bought a 5.1 surround sound system . It's only cord coming out of it once speakers are connected is 2 RCA inputs , a red and a white . How can I connect to my pc and still get 5.1 Sound ?

I want sound from all angles btw .

 

[Liekthis]

I had to buy a new Sound Card for mine, one that supports a 5.1 set up.