The Apple TV has some silly settings and I wish it just had a straight up bitstream mode for all audio. When selecting "best audio", it decodes and sends everything out as PCM. It will pass Atmos Metadata and your DD indicator will light up and Atmos will be displayed on the AVR. You can set it to ignore the metadata and it is sent as PCM. You can also have it bitstream old school DD 5.1 for everything and be done with it. I forgot about the Nvidia Shield cloud games. I may have to look into it. I can get my TF2 on without firing up the ol' XBOX 360.