i have just added a new pansonic 4k blueray player (dmp-ub400e) to my system which is a
samsung ks7500/ 43" tv,sonos playbar, sky hd box.
when i play a blueray disc then go into the sonos app/ about my sonos system/ audio in it says dolby 5.1.
then after a short while i looked in the app again and it said audio in stereo i cant make out why.
the blueray player and sky box are connected to the samung tv one connect box by hdmi cable.
playbar connected to the samsung one connect box by optical csble.