Sounds

Deskbar:		Preferences
Location:		/boot/system/preferences/Sounds
Settings:		~/config/settings/Media/MediaFiles

You can assign sounds to certain events in the system. Just select the event from the list and choose a sound from the pop-up menu below.

None		will silence an event.
Other...		will open a file panel to find a new sound that isn't yet in the menu.

You can use any format that's supported by the system. If MediaPlayer can deal with it, so can any other program.
You can "pre-hear" an event's sound by selecting it and using the Play and Stop buttons.