Abstract: The audio-visual apparatus comprises a single cassette which contains both the magnetic tape with the audio section recorded thereon and the photographic film with the video section consisting of a series of mono or stereo frames. The payoff spool and the takeup spool of the magnetic tape are coaxial respectively to the payoff spool and to the takeup spool of the photographic film, and there is provided a device for stopping the motion of the photographic film with respect to the motion of the magnetic tape, so as to allow the reproduction of the audio section during the projection of a photographic frame.