I have a Onkyo TX-NR686 AVR, I am unable to get any audio when my Vero 4K is sending 7.1 PCM. If I set number of speakers in Kodi to 5.1 then the audio is working. When set to 7.1 my AVR shows it is receiving a 7.1 PCM multi channel input but I hear nothing apart from a ‘thud’ sound when the audio stream is first started.
Using passthrough 7.1 works, however there are various UHD Movies from Disney that have audio dropout issues when using passthrough and I’d previously been playing these movies using PCM on my old AVR to avoid this issue.
I don’t know much detail apart from people saying the Disney movies sometimes have very high bitrate that causes the audio to drop. It is always at exactly the same places per movie. Guardians of the Galaxy 2 only has a few, but Pirates of the Caribbean Dead Man’s Chest and Coco has loads of drops.
Just a heads up, might be expected but I’ve just updated to the latest test build and now passthrough of all audio is not working. On the plus side the 7.1 PCM works without having to select PCM Analog.