[jpsdr]

Does the behaviour you are looking for work under mpc-hc?

I don't know. As it's working with dvdplayer, i was expecting it working with dsplayer, as i always thought dsplaye was "more" than dvdplayer, or at least equal.
I'm surprised no one until now never asked for this behavior, or at least it's the feeling i have (maybe i'm wrong). Anyone who have an audio receiver will expect this behavior, for exemple, if audio in source file is 2.0, to have the receiver detect dolby surrond (if there is), and act as expected. This is possible only if 2 channels are send to receiver.
To resume basicaly : Allow/let the audio receiver do all his audio stuff. This is possible only if player behaves like i've described.

If what i'm expecting is unfortunately not possible with dsplayer, so be it...