More details are needed, like:
1 - OS
2 - Media player
3 - Media type/format you want to play.
1 Windows 8.1
Yes! I did check that.
In properties for the sound in supported formats in windows
i have support for 8 channels, but for encoded formats
i only have dts audio and dolby digital.
The problem lies i think in the samsung receiver you mentioned. You have a so called hts system. It can play and decode dts-hd format but NOT from hdmi only from the internal blue-ray drive.
My philips HTS-8562 has exactely the same problem, after research it was a specification matter. It can decode the format DTS-HD but NOT from hdmi input.
Is that 100% sure, because now i have to
by a new reciever?
The problem could be in some settings. Your TV should not be DTS capable, so you need to set HDMI OUT only for video in the Samsung 6750. Check pag. 35 http://downloadcenter.samsung.com/content/UM/201202/20120203210232837/AH68-02336F_REV03_HT-D6750W_EN1_web_0117.pdf
100% assurance i cant give you cause i dont own the same receiver as you have. But you can simply just enable dolby digital and dts. Personally i dont think your set or mine for that matter have enough quality to even hear the difference between dts and dts-hd. Al movies i know also have besides dts-hd dts or dolby digital support.
Yes thats true! Thanx for the response
Because of the kodi-implementation of sound over hdmi it can also very well be that there are detection problems with cec (intel nuc doesnt support it but your hts and tv i presume do).
Personally i think you are with your samsung hts in the same boat as me and it doesnt support hdmi sound input with dts-hd. If you have doubts you can even call and contact samsung support.
Or read the manual as i did for you
It seems like the correct and right answer.