The System sound settings menu lets you control your Samsung mobile device’s audio, from ringtones and alerts to touch-tones and notifications. There are two kinds of Sound settings in most of the Samsung devices. They are General sound settings and System sound settings.
Besides, how do I change the notification sound on my Android?
If you use the default Messaging app, tap its icon to open it, tap the Menu button in the lower right corner (denoted by three dots), then tap Settings. Scroll down to the Notifications section and tap Sound. Select a new notification sound from the list, then tap OK.