I run through a receiver in the living room and family room systems. The rest of the systems are two channel anyway, so it doesn't matter. I'm not transcoding. Roku is sending DD 5.1 to my receiver.I'd love to know what I'm doing differently; I'll have to poke around again as I'd given up on that TV. I'm using a Plex server too. And you're running without a receiver? Are you having Plex transcode?