I'm just curious if anyone does this. I assume most modern sound cards and even built in MOBO cards now have optical outputs, as my Z97 does. Does anyone use it to connect to a home theater receiver and drive an actual 5.1 system? I'm asking because I have an older Pioneer HD home theater receiver and a really nice set of Polk RSi speakers and sub. I am about to switch my home theater to an Atmos sound bar and I was wondering if it would be worth it to use my receiver and speakers for my PC. Is the sound quality better than a typical PC speaker setup with a single 3.5mm connection?