※ If it does not work on Galaxy S7 please update it to latest software.
(Settings -> Sofrware update)
※ How to set the app volume : https://youtu.be/Z5mrB4ryKjE

SoundAssistant
The sound utility available on the galaxy series
Provides various convenience functions related to audio
- Allow you to control the media volume instead of ringtone when pressing the volume keys
- Support individual application volume (You can control the volume of music and games differently)
- 150 steps of fine volume and support Floating Equalizer(EQ)
- Create and activate personalize sound settings
- Support mono audio and left/right balance

The following feature is supported on s8 only.
- Different output path for each app can be specified. (Music app -> Bluetooth Game app -> Speaker)
How to use : https://youtu.be/Z5mrB4ryKjE