There's no wiki about channel mapping. I had extensively searched before the post. Can you please send me the link to this particular setting? I would be happy.

Setting the output channels to 5.1. or 7.1 seems not related the wrong channel mapping. I tried them both without success.
Connecting JR via HDMI to AVR seems to miss the bit perfect (DTSwav FLAC files cannot lie).
I am not happy to say that, foobar2000 > JR when playing my music in the laptop or connecting directly to AVR via HDMI, except the FB2K ugly user interface.
Streaming DSD64 2.0 from a vw file to my AVR it does not work correctly either (another thread open).
[Update] This is definitely a bug or a wrong implementation in JR. I will sincerily apologise if it's not the case.
Forcing output to 5.1 or 7.1 speakers kills the bitperfect play (DTSWAV/FLAC play only noise).
Maybe I should forget Mch WAV in JR then? Sad but true.
And I am not here to make JR haters happy or to join them.
I need a solution for such basic functionality.
I need no fancy lights and bulbs, no room correction, MC mix, additional zones, Volume levelling/control, Equaliser x2, Effects, Tempo and Pitch. Let them be. I need no miracles.
Just play the files bit perfectly.
You give me that, I will be happy JR user.
Thanks again folks and sorry for the long message(s).