Audio and video production and recording studio systems, namely, analogue and digital computerized consoles and work stations comprised of a computer-based digital apparatus and parts therefor, all for recording, controlling, editing, modifying, enhancing and mixing music, audio and video; electrical and electronic apparatus for processing signals, namely, analogue and digital computerized consoles and work stations; apparatus for processing, manipulating, editing, mixing and recording audio signals, namely, analogue and digital computerized consoles and work stations; apparatus for processing, manipulating, editing, mixing, displaying and recording digital video signals, namely, analogue and digital computerized consoles and work stations; electric and electronic apparatus and instruments for recording, storing, processing, manipulating, combining, mixing, editing, transmission and reproduction of analogue and digital audio and video signals, namely, analogue and digital computerized consoles and work stations; electric and electronic apparatus and instruments for recording, storing, transmission and reproduction of sound, static images and moving images; audio and video mixing equipment, namely, mixing boards; computer programs for operating video mixing equipment and operating audio mixing equipment; magnetic data media, namely, CD-ROMs and magnetic discs both featuring computer programs for operating video mixing equipment and operating audio mixing equipment; optical data media, namely, optical discs featuring computer programs for operating video mixing equipment and operating audio mixing equipment; magneto-optical data media, namely, magneto-optical discs featuring computer programs for operating video mixing equipment and operating audio mixing equipment; magnetic tape drive units for computers; replacement parts for all the aforesaid goods