Event - Play a Sound
One of the most simple event types is to play a sound (i.e.: .wav file) of some kind.
This event can happen based on the standard notification rules, and can play anything that Windows multimedia sound function wants to play. If you want to launch a sound file that this event type doesn't support, use the "Launch an executable" option instead, as it will launch any file, including sound files.
Click the folder on the right side of the file name to browse for a file. When browsing for files, you can right-click on any sound file to play it (this is an operating system feature, and may not be supported on all operating systems).
Enter "BEEP" (no quotes) here if you just want to beep the computer speaker instead of playing through the sound card.