I may be missing something simple but I have just received delivery of my new ARC. All set up fine very impressed with it. However I have Sky Q, I have changed the sound settings to Dolby Digital Plus, If I watch programs/films in SD HD and NON atmos UHD I have no issues. If I play a movie that is recorded in Dolby Atmos I have no sound. This is despite the SKY info box saying that ATMOS is supported through Dolby Digital Plus and being told by Samsung that my TV supports pass through for Dolby Digital Plus.
Any ideas/solutions would be appreciated