@signalstation you can fix this in the Settings menu, under Notifications. Under Ringtone, just uncheck the ”Bells of the sleeping undead" entry and choose something more soothing like ”nearly inaudible flapping of giant unseen winged beings" or ”slow quiet croaking of curse toads". And under Visual, replace ”Mountain top balefires" with "LED indicator".
@MightyBigCar @signalstation
this depends on the version of Mastodon installed, though, because it's a fairly recent change