Dolby Atmos delivers a premium listening experience through your phone's loudspeaker and connected devices.
Smart audio automatically chooses the best settings for the media you're listening to. When you connect headphones or external speakers, you can set and customize sound profiles.
You can select a preset sound profile for your loudspeaker, headphones, or other connected device, and your phone will remember the next time you connect it.
Open quick settings, then touch & hold 
Or, open the Dolby Atmos app 
Choose how to adjust sound:
To customize a selected sound profile, next to the profile name tap 



To turn Dolby Atmos off for your loudspeaker, headphones or another connected device:

