You can connect one or two HomePod speakers to Apple TV 4K to enjoy stereo, Dolby Atmos, Dolby Digital 7.1, or Dolby Digital 5.1 surround sound. When you set up a second HomePod as a stereo pair, you get true stereo sound and a more immersive sound stage for your home theater.
Note: Apple TV 4K does not support home theater sound on HomePod mini.
If you have an Apple TV 4K (2nd generation), you can play audio on your HomePod speakers from devices such as DVD players or game consoles that are connected to a supported TV with an HDMI cable. For more information, see Set up Apple TV.
Before you start, make sure you’ve assigned a room to your Apple TV. Your HomePod (or HomePod stereo pair) must be connected to the same network and set up in the same room as your Apple TV 4K using the Home app on an iOS, iPadOS, or macOS (Catalina or later) device.
For more information on setting up HomePod, see the HomePod User Guide.
Open Settings
on Apple TV 4K.
Go to Video and Audio > Default Audio Output, then select the HomePod (or HomePod stereo pair).
Note: This setting routes all sound, including navigation clicks, from Apple TV to your HomePod. Only HomePod speakers can be selected for default audio output and home theater sound. If you temporarily select other speaker options (such as HomePod mini or other wireless speakers), home theater sound and navigation clicks are not supported and your speaker selection resets after Apple TV is put to sleep.
For the best surround sound, place HomePod within 10 inches of a wall and as close to the center of your TV as possible. If you use a HomePod stereo pair, place the speakers on either side of the TV. For optimal surround sound, the HomePod speakers should be about 4 feet apart from each other.