I have an LG HT409SA Home Theater in a Box and i was wondering whether i could split the signal to imitate surround sound while watching tv. The problem i ran into was the fact that i have rogers basic cable box and an older tv with just 3 A/V slots. The rogers box happened to have a digital audio out though on the back of it. As well the receiver for the LG system had an optical port on the back of it. So i decided that i needed both a coaxial cable as well as an opitcal cable, however i need to find out which kind of converter to buy. Do i need a coax to optical that has coax in and optical out or do i need a converter that has coax out and optical in ? any help would be great.