If you want TrueHD + Atmos, you will need an Nvidia Shield Pro attached to the HDMI input of your TV.
TV manufacturer restrictions do not permit Smart TV apps to pass TrueHD + Atmos audio to attached audio equipment.
Equipment attached to a TV HDMI input can pass TrueHD + Atmos (and dts-HD) audio through the TV to attached audio equipment.
The Nvidia Shield Pro is the only streaming device that plays 4K HDR video and will passthrough TrueHD + Atmos and dts-HD audio.
See this thread for additional information:
