Apparatus for creating, recording, transmission, processing, retrieval, manipulation and reproduction of sound; microphones; microphone preamplifiers; direct input boxes; mixing consoles; dynamic processors; effects and signal processors; equalizers; crossovers; audio controllers; audio interfaces; signal distribution devices; signal converters; headphone amplifiers; headphones; power amplifiers; musical instrument amplifiers; loudspeakers; apparatus for controlling lighting; computer software for creating, recording, transmission, processing, retrieval, manipulation and reproduction of sound; manuals in electronic format