Tim via users writes:
On Sat, 2022-11-26 at 16:15 +1030, Tim via users wrote:
I suppose you could search for likely sounding file names for the sample that's played.
e.g. locate sounds|grep usr
Look through the results and play the likely candidates. Then if you find it, delete it, or replace it with something less annoying, or a silent file. Make a note of which file, so you can do the same thing after any updates.
Likely candidates on my (different) installation:
$ locate alerts|grep usr /usr/share/sounds/gnome/default/alerts /usr/share/sounds/gnome/default/alerts/bark.ogg /usr/share/sounds/gnome/default/alerts/drip.ogg /usr/share/sounds/gnome/default/alerts/glass.ogg /usr/share/sounds/gnome/default/alerts/sonar.ogg /usr/share/sounds/mate/default/alerts /usr/share/sounds/mate/default/alerts/bark.ogg /usr/share/sounds/mate/default/alerts/drip.ogg /usr/share/sounds/mate/default/alerts/glass.ogg /usr/share/sounds/mate/default/alerts/sonar.ogg
This seems to be /usr/share/sounds/freedesktop/stereo/bell.oga
In terms of turning it off, I already mentioned that muting "System Sounds" in audio mixer seems to be the global off switch.
Its package, sound-theme-freedesktop, doesn't seem to include anything that looks like a configuration tool. I presume that whatever in XFCE is playing that is configurable, somewhere, but I can't find it.