Hi! The Q90T, along with other Samsung 2020 TVs, feature full compatibility with Dolby Atmos. With the HDMI eARC port on HDMI 3, you can take advantage of uncompressed Dolby Atmos sound when connected to a compatible audio device. You can either connect your devices to the TV, then utilize HDMI ARC to your receiver, or connect your devices to the receiver and use the HDMI output to the TV. ^Tim