digital mixers of electronically generated signals in mono,stereo- or multi-channel recording, transmission, real-time broadcast and/or entertainment applications; signal mixers for use in audio transmissions or recordings and for transmissions and recordings of audio segments in video applications; computers to automatically control active output combiners, master faders, volume controls; multi-colored metering devices to allow visual monitoring of the mixing activities; compact housing to accommodate mixers, comprising a console module to accommodate, on its face, actuators, switches, meters, connectors, controls, dials, audio in-put and out-put sockets; co-axial, computer and electrical cables and wires, integrated circuits and circuit boards; and, accessories, namely, expander consoles, meter bridges, support stands, equipment racks, rack mount brackets, connecting and mounting brackets, and mounting rails, all for use with mixers