@MaryLouMaloney this is from page 12 of the manual....
You can select a listening mode from various options such as Dolby Atmos, Dolby Digital and DTS. Select the desired mode by switching and listening actual sound in different modes. The selectable listening modes depend on the format of the input signals. MOVIE/TV: You can select a listening mode suitable for movies and TV programs. MUSIC: You can select a listening mode suitable for music. GAME: You can select a listening mode suitable for games. STEREO: You can select a listening mode for stereo and all channel stereo sources. PURE AUDIO (main unit only) (European, Australian and Asian models): The display and analog video circuits are cut off to provide purer sound. For details on the listening modes, see the Advanced