Looking for guidance on what DirecTV content has Dolby Atmos sound. I have all the required 4k equipment, but the 4k channel is showing up as Dolby Digital Plus on my Yamaha AVR. I can get Atmos via Nvidia Shield on Netflix, but stumped on the DirecTV front. Guide data shows 4k and HDR, but doesn't specify what audio I should be able to get. Thanks in advance!