This is quite funny! However, way too much nonsense was spent NOT answering this simple question so I figured I’d share this from Adobe:
Change the render-complete sounds
A chime plays when all items in the render queue have been rendered and exported; a different sound plays if a render operation fails. You can change the render-complete sounds by replacing files named rnd_okay.wav and rnd_fail.wav in the sounds folder. The sounds folder is in the following location:
(Windows) Program FilesAdobeAdobe After Effects CS5Support Files
(Mac OS) Applications/Adobe After Effects CS5/Adobe After Effects CS5/Contents/Resources/Sounds
Control-click the Adobe After Effects CS5 application package and choose Show Contents to open the Adobe After Effects CS5 application package and show the Contents directory.