Unique listening modes are available with Devialet Dione - they are configured by default according to the source you are using, you can select each of them based on your preference.

Movie Mode - Actively converts mono and stereo content into a thrilling multichannel experience when connected via the HDMI and Optical inputs. (by default on HDMI and Optical input)
Spatial Mode - Delivers layered 3D sound from any online source (AirPlay 2, Bluetooth, Spotify Connect, and UPnP) in order to place the listener center stage and enjoy music and other content optimally.
Voice Mode- Boosts accuracy and intelligibility on programs like podcasts and news.
Music Mode - Faithfully reproduces a stereo setup and disables all spatialization effects. (By default on AirPlay 2, Spotify Connect, Bluetooth, and UPnP)

Movie and Spatial Mode - Is turned on by default for mono and stereo content respectively on the HDMI/Optical input for the Movie mode and Spatial mode is activated by default when listening to any online source (AirPlay 2, Spotify Connect, Bluetooth, UPnP). Voice and Music Mode can be turned on at any time using the Devialet application.