Apparatus for recording, processing, distribution, transmission and reproduction of image and sound signals, in particular in studios, public areas, theatres, cinemas, concert halls, halls, exhibitions, railway stations, airports, company buildings; calculating machines, data processing equipment, signal processing equipment, and computers; components for calculating machines, data processing equipment, signal processing equipment and computers; blank magnetic, optical, electric, and mechanical data carriers for storage and transmission of data; coin-operated mechanisms for vending machines and mechanisms for coin-operated apparatus; computer terminals for video and/or audio recording and component parts thereof; computer terminals for video and/or audio signal processing and component parts thereof; computer terminals for video and/or audio reproduction and component parts thereof; components for terminals for video and/or audio reproduction; digital software programs for data and signal processors and computer operating systems; electronic components, in particular programmable logic circuits and data and signal processors; downloadable electronic publications in the nature of journals, newsletters in the field of audio and video technology; graphical user interface software, software modules for data and signal processing; software and hardware for the development of data processing systems; software and hardware for the development of software for data processing systems, telecommunications installations, intercom systems, microphones, cameras, loudspeakers, televisions, displays, speech signal processing; software for the transmission of audio and video data and multimedia data