Question

I have to use a dac converter since I have a newer tv and a older sound system (5.1) and I can only use 1 set of rca cables, how would I go about using my main and surround speaker including my subwoofer all at the same time?

I have to use a dac converter since I have a newer tv and a older sound system (5.1) and I can only use 1 set of rca cables, how would I go about using my main and surround speaker including my subwoofer all at the same time?