I’ve been switching off sounds for notifications for different programs for a while as I find the notuification chime far too loud compared to other program sounds, but as I am doing this on five or more machines, it is getting somewhat irritating. I eventually started thinking about a global switch off and wanted to see if this was possible, but since Microsoft moved settings out of the Control Panel, I have had a hard time finding a setting when I want it.
This particular setting does exist and is in what is an obvious place (or at least obvious when you know where it is); do disable sounds on notifications globally, open the Notifications and settings app (the shortcut ms-settings:notifications can be used to open it quickly) and unmark the Allow notifications to play sounds):
I have an article on the settings shortcuts.