In chat, I have several options on how to choose a setting for sound notifications: none, when mentioned, visible rooms, all my rooms.
My settings are usually set to "when mentioned", in which case I get a beep sound when I am pinged (while being present in some room). However, I am not sure what exactly is the difference between "visible room" and "all my rooms". (When I tested them a bit, my impression was that I get sound notification for every message posted in the rooms I am currently in. Is this what that setting does? Does "all my rooms" mean that it notifies me about messages in all my favorite rooms, even if I am not in the room.)
Question: What exactly is the difference between "visible room" and "all my rooms" in the settings for sound notifications in chat?