9 Audio mixers; sound mixers; audio amplifiers; audio speakers; audio signal processors; analog signal processors; digital signal processors; digital to analog audio signal converters; audio and electronic signal input and output transducers; stands especially adapted to support audio equipment, racks especially adapted to hold audio equipment, mounting brackets and stands especially adapted to hold audio equipment; digital controllers to automatically control active audio equipment output combiners, master faders, volume controls; computer and electrical cables and wires; carrying cases especially adapted to support electronic equipment, namely, audio equipment, excluding gaming apparatus; earphones; headphones; microphones; MIDI interfaces; light control interfaces being digital light switches; digital multiplex (DMX) interfaces being digital light controllers; wired and wireless signal transmission systems for audio and data signals composed of electric cables, headphones, microphones, and digital interfaces for computers