Abstract: Novel equipment utilizing a single head, single gap on a single track in an audio magnetic recorder to permit control of a large variety of audio-visual devices for the pre-programming of a multi-media presentation in educational, entertainment and other fields. Particular structure, including an audio magnetic tape drive mechanism, which permits, by means of a single head with a single gap on a single track, index signal recording, data signal recording, data signal updating and data signal playback is provided to perform multiple discrete and proportional control functions. The same magnetic tape may carry on a separate track or tracks audio information which is correlated with the functions controlled by the data recorded on the device control track.