Hi I have the above setup connected to a beam gen2 via arc ,A sub mini and 2 Era100s as a surround pair.
if I play a streaming app I get Dolby 5.1 or Atmos showing on Sonos app. If I play a blue ray or dvd I only see stereo pcm. The tv has auto, bypass , pcm settings and the blue ray player has hdmi as either auto or pcm. I have tried many combinations but it never changes from stereo pcm.