Light organ
From Wikipedia, the free encyclopedia
A light organ is an electronic device which automatically converts audio signal into rhythmic light effects. In the 1970s, light organs were popular equipment in discotheques and parties. Nowadays they are no longer widely used in discotheques, because most of them cannot be controlled manually. The circuit of a light organ separates the audio signal into frequency bands and controls the light channels according to the average level of each band using dimmers. A typical party light organ of the 1970s had three spotlights, red, green and blue, for sounds in bass, medium frequency and high frequency. Due to their simple structure, light organs were popular as DIY projects for electronics hobbyists. With widespread adoption of cheap PCs, some hobbyists started experimenting with using them for frequency analysis instead of analog filters.
