Apparatus for recording, transmission or reproduction of sound or images; computer hardware; computer software to control and improve computer and audio equipment sound quality and computer software for the storage, reproduction, transmission and editing of sound, data, text, images, and video in computer audio components and multimedia applications; computer peripherals; digital audio players and recorders; digital image recorders and viewers; electronic audio and video components, sound systems comprised of receivers, amplifiers, tuners, sound mixers, equalisers, audio and video recorders and players, and radios; earphones; headphones; network interface and communication devices, modems, telephones, switches, routers, hubs and adapters; loudspeakers; remote controls; audio apparatus for vehicles; audio-visual apparatus for vehicles; audio-visual head units; automobile speakers; subwoofers for automobiles; audio-visual control apparatus; audio signal processors; amplifiers; audio multi-channel management apparatus; headphones for automobiles; earphones and earplugs for automobiles; electronic multimedia components for use in automobiles; and electronic manuals (downloadable) distributed therewith