Have installed a new Samsung MU9000 TV that has the Samsung One Connect hub that everything plugs into. Used the Optical Toshlink connection between my Playbar and the One Connect. Setup everything according to the guidelines on Sonos. While it does work the volume output is low. I have to put the volume at max in the app just to get an almost acceptable leve. Have searched various forums and not heard this issue tied to anything with this generation of smart hub. I have verified that the Samsung One Connect is configured for optical cable out, and is transmitting Dolby Digital.