You can attach sounds to events. The format must a .WAV file. Either a URL, or path to a local file. If a local file the backslash's in the path must be escaped. (eg. playsound: 'C:\\Windows\\sound_file.wav'). Some sound files can be found here. Another great example of sounds can be seen in the 'Browse Root of C:' example in 'Files & Browsing'.