Apparatus for use in recording, transmission, processing or reproduction of sound or images, namely, audio mixers, turntables, compact disc players, [ digital video disc players, ] beat controllers, sound equalizers, audio receivers, speakers, headphones, cartridges for turntables, audio amplifiers, audio adapters, musical instrument digital interface (MIDI) controllers, timecode systems for controlling digital audio, musical instrument digital interface (MIDI) or video signals, comprised of an interface for connecting devices, namely, CD-players, mixers, turntables, microphones, headphones, or computers to software for utilizing the interface; digital vinyl systems for controlling digital audio, musical instrument digital interface (MIDI) or video signals, comprised of an interface for connecting devices, namely, CD-players, mixers, turntables, microphones, headphones, or computers to software for utilizing the interface; audio transmitters for use with wireless microphones, wireless headsets, or wireless headphones; wireless video/audio devices, namely, microphones, headsets, headphones, keyboards, speakers and electrical controllers for controlling wireless audio/video devices; hard disc drive controllers in the nature of computer interfaces; USB interfaces; audio samplers, namely, devices used to record, edit, and play sounds and music electronically; electronic audio sound effect devices for processing and manipulating audio or musical instrument digital interface (MIDI) signals, namely, flanger, transformer, pitch shifter, phaser, echo producer, audio pan controller; peripheral computer audio devices, microphones, PA systems; all such goods for use by professional disc jockeys