OK I've been trying to work this out for ages now lol and finally decided to ask on here. I have a very small av receiver which has two optical inputs, one coaxial and what I think is RCA (Red and White audio cable.) I want to have my computer,my PS3 and my TV plugged into it. Now, the PS3 is no trouble at all, as I simply use the optical. It's the TV and PC I'm having trouble with. I'm not sure exactly which sound card I have because in device manager etc it just says 'Realtek HD audio' so I'm not sure which sound card it actually is. It has 6 different outputs which I assume are individual speaker outputs (left right center etc) but I know of no way to connect this set of connections to optical or coaxial, so I am using a cable from the headphone port of the PC into the RCA input of the receiver. Which unfortunately leaves no space for my TV, which only has RCA output. So I basically need a method of either converting RCA to optical/coaxial or converting whatever output my PC is using to optical/coaxial. Thanks for any help
EDIT: You can see my available PC outputs in this picture.