Thanks. Your amp is advertising support for the following formats:
====================== Audio Cap =================== k3dRrf31
CodingType MaxChannels SamplingFreq SampleSize
PCM, 8 ch, 32/44.1/48/88.2/96/176.4/192 kHz, 16/20/24 bit
AC-3, 6 ch, 32/44.1/48 kHz, bit
DTS, 6 ch, 44.1/48/88.2/96 kHz, bit
OneBitAudio, 6 ch, 44.1 kHz, bit
Dobly_Digital+, 8 ch, 44.1/48 kHz, 16 bit
DTS-HD, 8 ch, 44.1/48/88.2/96/176.4/192 kHz, 16/20 bit
MAT, 8 ch, 44.1/48/88.2/96/176.4/192 kHz, 16 bit
DTS-HD, 8 ch, 44.1/48/88.2/96/176.4/192 kHz, 16 bit
I see you tried: SERVER-PC/TV Serien und Konzerte/Sound Demo/Atoms/Dolby_Amaze_Lossless-ATMOS-thedigitaltheater.mkv.
I’d like to see DTS HD working first, as you said that didn’t work and we are not aware of issues with that. Can you try the clip I suggested above?
Also: please enable debugging (Settings -> System), then I can see what is going on when you try and play the clip