When I do a search in the database and the results are shown, a short beep will sound. I would like to disable this beep but can’t seem to found the setting.
It’s the standard Windows “beep”. You can turn it off in the Windows settings, but then you won’t hear it anywhere anymore. Don’t know if it can be disabled in mAirlist itself.
Disclaimer: I am not aware of the browser making any beeps (that would be totally pointless in a radio automation). I must admit that I have turned off all system sounds on my development machines, so maybe I have just never noticed 
It’s not in the browser of the player where it happens, it’s only in the standalone database software.
Thanks, Lukeman! Solved this way.