Your phone automatically identifies the type of media you're playing and adjusts sound for that experience. You don't have to do anything.
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 Audio effects app 
Choose how to adjust sound:


To customize a selected sound profile, next to the profile name tap 

