Open Settings on Apple TV.
Go to Apps > Music and do any of the following:
Automatically add to your library any Apple Music songs you add to playlists: Turn on Add Playlist Songs to Library.
Choose what appears at the top of your Home Screen: If the Music app is in the top row of the Home Screen on Apple TV, when you highlight the app, music suggestions appear in the shelf above it. To choose what type of content appears there, select Top Shelf to switch between Video Playlists and Library Top Albums.
Listen to music in Dolby Atmos: Select Dolby Atmos to listen to supported songs in Dolby Atmos and other Dolby audio formats when connected to HomePod or other compatible audio receivers or speakers.
Set Audio Quality: Select Audio Quality to switch between High Quality (AAC), or Lossless (ALAC up to 24-bit/48 kHz). Lossless files preserve every detail of the original audio. Support for lossless files depends on song availability, network conditions, and speaker capability.
Normalize the sound level of your music: Select Sound Check to turn it on or off.
Share music played on Apple TV with your followers on Apple Music: Turn on Use Listening History. When turned on, this setting also influences the recommendations you get on the Listen Now screen.
For more information on changing the default audio output, changing the audio format, or calibrating your audio, see Adjust other audio settings.