I wonder if it’s possible to change the alarm and timer sound of the Clocks app. I am using Gnome by the way. I tried searching the forum and also the Help doc (F1) but I can’t find anything about changing the sound. The sound is just a “ding” and if I’m watching videos or music, I don’t hear it. I want it to play non-stop until I stop it or just change to a sound that plays longer. Currently, it’s just like a 1 second beep/ding.
You should be safe on following this https://unix.stackexchange.com/questions/419477/change-default-sounds-of-gnome-clocks-app
Here are more details about the Sound Theme Specification.
It appears that it’s easier to change the sound in a mobile phone.