Close-sound-from-file
From FreeSpace Wiki
close-sound-from-file Closes the currently playing sound started by play-sound-from-file, if there is any. Takes 1 argument... 1: Fade (default is true)
Notes
- You don't need this SEXP if you want a given sound (being played via the play-sound-from-file) be interrupted by another. Just simply set the new sound and it will automatically stop playing the first sound.