On Linux Mint Cinnamon 19.3, I'd like to set a sound to be played when the system "Locks" (i.e. by closing the lid, screensaver, etc). However, there appears to be no such option under Preferences->Sound->Sounds (it has options for Starting & Leaving Cinnamon, but none for locking). If anyone could point me to how can I can do this, I'd be much appreciative - I've spent a fair bit of time Googling, so far to no avail.
Thanks in advance!