The usual setup is from sources to the receiver then from receiver to the HDTV.
The audio is then processed in the receive and video passed onto the HDTV.
If this fails, you have to talk to each maker to see where they failed.
Just purchased a Vizio E50-F2 HDR w/DV and a Sony UBP-X700 Ultra HD Blu-Ray Player. My receiver is a Sony STR-DH550, which I know won't decode the HDR. I have the UBP-X700 connected direct to the TV (for Dolby Vision), ARC back to the receiver. I have tried every configuration in the book to get the HD audio to decode from the receiver. It will only play back Dolby Digital 5.1 and DTS 5.1. Will the Vizio not send HD audio signals back to the receiver? I apologize in advance for what may be a simple newbie problem.