Customize event notification sounds
- Open Calendar > Menu > Preferences & Accounts.
- Tap the field under Event Reminders > tap any of the following:
Vibrate: The device vibrates.
System Sound: The system sound plays.
Mute: No sound plays and the device does not vibrate. 3. Tap Done.
The settings you apply here apply to all of your calendars.
Checked against the LuneOS code and installed apps. Nobody has tried these steps by hand yet, so tell us if something differs.