[Acrobat76]

Problem: HD/DTS audio doesn’t work and causes severe video stuttering in XBMC. If I set to analog, all works fine

Your TV cannot play them. If you are lucky it can play AC3, which is also the only format it announces. So turn off DTS in your audio settings, it will be transcoded to AC3. If also AC3 does not work, disable that too.

Thanks for your reply fritsch, but please help me understand because I am confused. These are the audio specs of the TV:

Audio
Dolby Digital Plus / Dolby Pulse
DTS Studio Sound
DTS Premium Audio 5.1
3D Sound available
Down Firing + Full Range Speaker Type
10W x 2 Sound Output (RMS)
http://www.samsung.com/uk/consumer/tv-au...SBXXU-spec

Surely it should be able to play DTS and Dolby Digital(AC3)?