elitejp

Ok heres my problem, i just bought a audio receiver/amp so that I could get 5.1 audio (it can still be returned). It has the 5.1 av outlets and a ac-3 dts outlet that looks like a mouse or keyboard outlet on the computer.(its a midi in connection) what i want to do is run 5.1 audio from my computer to the amp. The computer only has one hdmi cable which is connected to the tv and just the basic microphone connectors. Which would only be able to give 2.1 sound. Now i was thinking I could exchange the amp for one that had an hdmi connection. The computer would run an hdmi cable to the tv and the tv would then run another hdmi cable to the amp. Hopefully this would provide 5.1 sound to the amp and then to my speakers. Or I would need to buy a sound card to connect av outlets to the av outlets on the computer.

Im quite confused on what is the best way to do this or if I gave the relavant information for anyone to help, in anycase, please help the best you can.

ps. I rarely use my dvd player so not having 5.1 audio on the dvd player is just fine by me.