Vero HDMI DTS Dolby Digital

Hi all of you. I connect my Vero to Samsung Full-HD TV with HDMI.
Then my TV is connected to a Samsung Hw-H600 Sound Stand (4.2 audio channel with support to DTS and Dolby Digital) with a HDMI-ARC cable. How can I enable the DTS and Dolby Digital audio when I play a movie with Vero ?
It seems is not propagated to the sound-stand and is flatted to a stereo sound…

Unless the TV documentation reports that it supports DTS passthrough of multichannel streams by ARC, I’m not sure what you could do. Did you already enable passthrough in Kodi audio output settings?