5.1 FLAC Files only play in Stereo

As the headline says - I can't get 5.1 FLAC files to play back in anything beyond stereo...

Kodi audio settings:
Output optimized, 7.1, Passthrough on.

Zidoo/Android HDMI Audio output set to RAW.

What am I missing??

TIA,
Erik

 

What do you get when you use the internal player either on its own or via zdmc?

 

with the built-in musicplayer I get 5.1, so the issue must be with ZDMC I suppose...?

- Erik