[noggin]

Is there a way to preserve Auro3D audio in a pure PCM format (i.e. Red Tails doesn't wrap Auro3D in DTS-MasterHD like other discs, but has it as pure PCM on the disc).  If I use MakeMKV and dump the disc with PCM, it won't see the Auro3D track on my Marantz receiver (the DTS wrapped ones work fine).  I'm not sure if the problem is MakeMKV or KODI or something else.  It only sees PCM 5.1, not Auro3D signal at all.  I have to play the disc via BD player to get it.   Auro3D is encoded in the 24-bit PCM file in both cases, but I think the multi-channel output of KODI may be the issue.  I'm not sure how a BD player does it differently (does PCM "bitstream" ?  Passthrough setting makes no difference.  Thanks.

Have you selected Best Match or fixed your PCM output in Kodi's System Audio settings. Optimised isn't always a good fit.

AIUI Auro3D is carried in a PCM signal - which wouldn't be described as being 'bit streamed or passed through' as it's not a compressed format like DD/DTS/TrueHD/DTS HD etc. Also make sure your volume is at 100% in Kodi?

I'm guessing there is some tunnelled audio data in the PCM signal that can be destroyed?