A polyphonic analog synthesizer produced by Oberheim in the mid-1980s. It was designed to solve the problem that most polyphonic synths of the era had: limited signal routing capability. Instead of switches that provided a few options for routing of modulation signals, which was the usual practice of the time, the Matrix-12 used the matrix routing concept. This allowed any of a long list of sources to be routed to a number of possible destinations. It was implemented within hardware and software inside the synth, and required no patch cords. The matrix implementation solved the problems of signal loading and matching internally, and allowed the level of signal routed to a particular destination to be controlled.