I am about 90% sure that optical can only carry PCM (stereo) from the built in apps. The only way to get 5.1 would be to connect a 3rd party player (roku, ATV, etc) directly into the the sonos with the optical cable. Does any TV actually send 5.1 with the optical cable?I just got the ks8000 today and hooked it up with Sonos like you mentioned.
I have a Hulu account so I played some content through it (build it app on smart tv) and i DID NOT get surround sound (5.1). Can you direct me to some 'test' I can do to verify that my setup is correct for surround sound ? I have heard that Netflix (built in app) has 5.1 audio ... would this be a good 'test' ??
That is the only good thing about ARC, if you can get it working, and newer TVs. While it may not be the lossless kind, you can send 5.1, ATMOS, etc.
I love the way the sonos soundbar sounds, but not having HDMI really limits connectivity.