On February 1, 2018 at 12:22, Nexsen B. Johnson said...
Many users "think" their Samsung TV's which don't support Dolby passthrough can accept Dolby surround on its HDMI inputs but it will only be stereo due to the EDID negotiation in which the TV requests stereo . They are confused because the packaging and literature states "Dolby Digital" but that will only come from the TV's internal sources such as its tuner and streaming service and NOT its HDMI inputs. It is amazing how few users who actually own these TV's realize they aren't getting surround sound from their DVD or BluRay player if those HDMi sources go to the TV first and its optical output goes to their sound bar.
Another counterintuitive thing may be at play here: The audio could very well be two channel Dolby Digital. The TV might be telling the HDMI sources to deliver two-channel sound via Dolby Digital. Yes, DD can be just two channels.
And two channel outputs can give you surround via a receiver's ability to derive other channels from two. We used to call that ProLogic, and sometimes it actually is similar to surround sound.