I'm a super happy Emby user. It's one of my most favorite things to use. My family loves it too.
I recently bought a Sonos Arc + One SLs + Sub setup for my Sony with integrated Google TV. I've been really happy with a complete 5.1 sound setup, it's so wonderful.
Unfortunately I've been struggling to get 5.1 channel content through Emby to work with ease. My TV is setup with eARC and to pass through and auto convert to Dolby Digital Plus if necessary (i think?).
When I'm using some