I have an LG WebOS 55UP8000PUR tv running WebOS 653-47 and the amazon prime video app installed on the tv most current version. regardless of the title selected I am only getting Dolby multi channel PCM 2.0 audio output, no dolby 5.1 or Atmos. My Sonos Arc is conncted to the TV via the EARC port, which is enabled. Digital audio output is set to passthrough. Other TV apps like Peacock will play in other formats depending on the title selected. My Panasonic 4K player will play in Atmos or 5.1, again depending on the title format. My ARC is paired with 2 ERA 300’s and a sub.
I have talked with Amazon support, LG support and Sonos support and each tells me the issue is with one or more of the other products… If I understand correctly the Sonos support said someting about Prime using a Atmos 2.0 vs Atmos 5.0 codec? and this could be what it is not working… I am unsure how to proceed? Dolby atmos or Dolby 5.1 had worked previously with hPrime and I am unsure what changed.
Is there anything else I can check or what troubleshooting steps can be taken? or is this a known issue that is being worked on? Note: All prime video selections play in stereo but does use the sub.
