There have been many new developments in the production of moving film with synchronous sound track. In this all too familiar medium, developments are usually taken for granted and are not generally noticed. Areas of technology which have combined to produce ‘sync-sound’ have at the same time offered to a field of study, which some may prefer to call ethnochoreology, others ethnomusicology, a research facility the efficacy of which has not yet, in this writer's opinion, been fully explored. Because of this, the full impact of this facility on the practice and study of folk music and dance can not yet be properly gauged.