Solved! Arc surround problem on Yamaha RX-V371

[hojohansen]

I have surround problem with
Yamaha RX-V371 using Samsung 55" 4k with arc. The sound 5.1 DTS tuns to stereo..
I'm using av2 on the
Yamaha RX-V371

What can be the problem?

 

[americanaudiophile]

Does the receiver indicate (usually on the front display) if it is receiving 5.1? If not then you should check the audio menu of the TV and make sure it is set to output in bitstream.
Did you try changing the surround sound mode on the receiver? If it's on auto it should switch to DTS but if it's on Dolby it won't.

 

[jsmithepa]

Huh what? AV2 sounds like an analog input.

Assuming HDMI ARC plugs are properly used, go into TV menu/setup/system/audio find PCM/Surround and toggle that thing, see what happens.