Odroid C4 - HDMI audio does not work with multichannel (more than 2 channels)

Hi @MichaIng

I picked up a cheap Odroid C4 to test.

24bits is fine . But the bad news is 8channels does not work out of the box for the Odroid - only stereo,

8ch audio does work for the RPi4 out of the box but limited to 16bits.

Here are some screenshots below.

Any tips what this means?

See 8 channel speaker test below, It runs but AVR only shows stereo and sound is only from ch1 and ch2 speakers. Nothing out of the other 6 speakers