just recently completed jailbreak of atv2 4.3 and have xbmc installed. i'm trying to figure out options for sound though.
i am running the atv into a projector, and have a 2.1 speaker set i would like to use. it is all 3.5mm audio jacks. i have looked into it and am aware of the digital coax to analog converter boxes, but am hoping for a more affordable solution.

has anyone found an alternative way of having the sound play out of the computer the atv is streaming files from??? or a cheaper option to convert digital coax to analog?
i appreciate any help and info!!