On this "health bar" hud, a sound is supposed to be played when the battery reaches a certain point. http://luckywilbury.deviantart.com/art/Kingdom-Hearts-2-HUD-299594139
the meter has the sound and if actions set up, but not for the sound to be played.
(To have the sound play on an if action)
here is the if action code:
Replace {completepathtofile\wavname.wav} to match the location of your WAV file.
I put it in quotes to avoid problems if there are 'spaces' in the path.
If you put the WAV file in the same folder as this INI file, you would only need the WAV file name in the command.
Please don't put the curly braces in the option. I'm sure eclectic-tech put those there just to "indicate" that it is an example or something, but they are not needed or allowed in the actual option.