Samsung Galaxy S6 - Ringtones and Sounds

Settings 317
 Notifications
 System
Ringtones and Sounds
Choose a ringtone for incoming calls.
1. From home, tap Apps > Settings > Sounds and notifications .
2. Tap Ringtones and sounds for options:
 Ringtone: Select a default ringtone.
 Default notification sound: Choose a default sound for notifications.