The specific recorded material used can occasionally be the entire soundtrack of the film, where sound editing has already occurred, though in many cases it is only the vocal soundtrack (in various states of completion) along with a selection of sound effects.
In some cases, the complete audio package for a film may be used, having already undergone sound editing. More commonly, however, only the vocal tracks and a judiciously chosen assortment of sound effects are employed, in varying states of completion.