Thanks for your report, Garry. I understand that the sample rate is limited, good to know for sure.
The thing I'm especially worried about is PCM with more than 2 channels. I know in the Android firmware for the Minix U9-H, PCM is software limited to stereo only, apparently due to licensing issues. I'm hoping that LibreELEC will have 5.1/7.1 PCM capability. Can you tell me if that's possible on your box?
All my Minix U9 tests in previous post were using LibreElec. MCH = multichannel all audio only PCM (from FLAC). I tried 4.0, 5.0 and 5.1 as long as you limit sampling to 48KHz then all ok.
I didn't try 7.1 apologies. Will try later today and post here.
The interesting thing (for me) is my Denon AVR only plays Quad (4.0) PCM/FLAC if I set Kodi to 'Fixed' - 'Optimised' and 'Best Match' only produce stereo. That looks like a Kodi bug.