....... sorry, but I think I give up and stick with the converted files because my knowledge is way to limited.Anyway, I still think it's a Windows 10 problem, because on the same laptop with Windows 8 and a codec filter installed I could play these kind of files even in WMP.Now no codec and no filter works, only foobar2000, VLC and WMC can and probably other players as well.
....... yes. the tracks are ripped from a DTS CD.As far as I understand, foobar2000 uses the "foo_input_dts.dll" for the playback of these files.
I'm using only what is installed by default in foobar2000 portable, no ASIO or WASAPI plugins .......
ffmpeg -i 6channels.wav -ac 2 stereo.wav