Abstract: This invention discloses an apparatus for apparatus for conducting a comparison of a plurality of versions of a movie which differ at least in their audio channels and for generating an editing list for an output movie on the basis of the comparison, the apparatus comprising a movie version synchronizer operative to compare a plurality of movie versions which differ at least in their audio channels and generating a signal representing the mutual synchronization of the plurality of movie versions and an output movie generator receiving the synchronization signal and operative to generate a signal representing an output movie editing list for an output movie.