Apparatus and instruments for recording, transmitting, processing, mixing, sending, switching, storing, outputting, playing or reproduction of sound, images, text or data, namely, sound and picture recording and reproducing apparatus, electronic sound mixing, processing and synthesising apparatus, sound projectors and amplifiers, microphones, cameras, and sound, music and video editing appliances in the nature of sound mixers, audio mixing consoles, editing machines for movie films; data, sound or image processing equipment and computers, in particular electronic control panels, electronic sound, music and film mixing consoles and equipment in the nature of audio mixing consoles, sound mixers, sound and video playback machines, sound equalizers, electronic sound filters, sound level meters, loudspeakers, audio level oscillators, digital reverberators being digital sound processors, correlation graduators being digital sound processors, effects processors being digital sound processors, digital and analog signal processors, amplifiers, computer-aided loop control devices being signal processors for use with all the aforesaid goods; downloadable computer programs and software for processing sound and images; recorded computer programs and software for processing sound and images; downloadable simulation software for processing sound and images; recorded simulation software for processing sound and images; data carriers featuring computer programs and software for processing sound and images