Laser control arrangement for musical synthesiser - uses mirrors to reflect laser beams to photocells in synthesiser control circuits for control by beam interruption

摘要

The light beam (A) from a laser is split into several beams (D) by a separator (B). These beams are reflected by mirrors (C) to pass to photocells (E) located at various parts of a stage so that they can be interrupted by various parts of a performer's body. The photocell outputs are connected to a system which produces different voltage levels. These different voltages control a voltage controlled synthesiser to produce the corresponding musical sounds in frequency, amplitude or tone as previously determined. The photocell outputs may also control lighting simultaneously with the sound.