The term color organ refers to a tradition of mechanical (18th century), then electromechanical, devices built to represent sound or to accompany music in a visual medium—by any number of means. In the early 20th century, a silent color organ tradition (Lumia) developed. In the 1960s and '70s, the term "color organ" became popularly associated with electronic devices that responded to their music inputs with light shows[disambiguation needed]. The term "light organ" is increasingly being used for these devices; allowing "color organ" to reassume its original meaning.
Chronology of the idea and its various incarnations
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The dream of creating a visual music comparable to auditory music found its fulfillment in animated abstract films by artists such as Oskar Fischinger, Len Lye and Norman McLaren; but long before them, many people built instruments, usually called "color organs," that would display modulated colored light in some kind of fluid fashion comparable to music.
In 1725, French Jesuit monk Louis Bertrand Castel proposed the idea of Clavecin pour les yeux (Ocular Harpsichord). In the 1740s, German composer Telemann went to France to see it, composed some pieces for it and wrote a book about it. It had 60 small colored glass panes, each with a curtain that opened when a key was struck. In about 1742, Castel proposed the clavecin oculaire (a light organ) as an instrument to produce both sound and the 'proper' light colors.
In 1743, Johann Gottlob Krüger, a professor at the University of Hall, proposed his own version of the ocular harpsichord.
In 1877, US artist, inventor Bainbridge Bishop gets a patent for his first Color Organ. The instruments were lighted attachments designed for pipe organs that could project colored lights onto a screen in synchronization with musical performance. Bishop built three of the instruments; each was destroyed in a fire, including one in the home of P. T. Barnum.
In 1893, British painter Alexander Wallace Rimington invented the Clavier à lumières. Rimington's Colour Organ attracted much attention, including that of Richard Wagner and Sir George Grove. It has been incorrectly claimed that his device formed the basis of the moving lights that accompanied the New York premiere of Alexander Scriabin's synaesthetic symphony Prometheus: The Poem of Fire in 1915. The instrument that accompanied that premiere was lighting engineer Preston S. Millar's chromola, which was similar to Rimington's instrument.
In 1918, American concert pianist Mary Hallock-Greenewalt created an instrument she called the Sarabet. Also an inventor, she patented nine inventions related to her instrument, including the rheostat.
In 1921, Arthur C. Vinageras proposed the Chromopiano, an instrument resembling and played like a grand piano, but designed to project "chords" composed from colored lights.
In the 1920s, Danish-born Thomas Wilfred created the Clavilux,  a color organ, ultimately patenting seven versions. By 1930, he had produced 16 "Home Clavilux" units. Glass disks bearing art were sold with these "Clavilux Juniors." Wilfred coined the word lumia to describe the art. Significantly, Wilfred's instruments were designed to project colored imagery, not just fields of colored light as with earlier instruments.
In 1925, Hungarian composer Alexander Laszlo wrote a text called Color-Light-Music ; Laszlo toured Europe with a color organ.
In Germany, from the late 1920s–early 1930s, several color organs were demonstrated at a series of Color Music Congresses. Hirshfeld-Mack performed his Farbenlichtspiel color organ at these Congresses and at several other festivals and events in Germany. He had developed this color organ at the Weimar Bauhaus school, with Kurt Schwerdtfeger.
The 1939 London Daily Mail Ideal Home Exhibition featured a "72-way Light Console and Compton Organ for Colour Music", as well as a 70 feet, 230 kW "Kaleidakon" tower. 
From 1935–77, Charles Dockum built a series of Mobilcolor Projectors, his versions of silent color organs. Documentation and history are online at CVM. Some 16mm films exist of his performances and the operation of the Mobilcolor.
In 1950, Oskar Fischinger created the Lumigraph that produced imagery by pressing objects/hands into a rubberized screen that would protrude into colored light. The imagery of this device was manually generated, and was performed with various accompanying music. It required two people to operate: one to make changes to colors, the other to manipulate the screen. Fischinger performed the Lumigraph in Los Angeles and San Francisco in the 1950s. The Lumigraph was licensed by the producers of the 1964 sci-fi film, The Time Travelers. The Lumigraph does not have a keyboard, and does not generate music.
California Institute of the Arts scholar William Moritz has documented color organs as a form of visual music, particularly as a precursor to visual music cinema. His papers and original research are in the collection of the Center for Visual Music in Los Angeles, which also has other historical color organ papers and resources.
- Visual music
- Laser harp
- AudioCube – an electronic device capable of controlling as well visualizing sound and music through built in full colour RGB lighting
- New Epoch Notation Painting
- Light organ – an electronic device which automatically converts an audio signal into rhythmic light effects, which was popular in 1970s discotheques.
- Moritz, William (April 1997). "The Dream of Color Music, And Machines That Made it Possible". Animation World Magazine 2 (1).
- US patent #186298
- Bainbridge Bishop, A Souvenir of the Color Organ, with Some Suggestions in Regard to the Soul of the Rainbow and the Harmony of Light. 1893 pamphlet
- GB 189324814
- Articles on Rimington from The Strand including Colour organ photos
- Rimington, Alexander Wallace, Colour-Music The Art Of Mobile Colour. Hutchinson, London, 1912
- Brougher, Kerry; Judith Zilczer; Jeremy Strick; Ari Wiseman; Olivia Mattis (2005). Visual Music: Synaesthesia in Art and Music Since 1900. Thames & Hudson.
- Thomas Wilfred's Clavilux. [Borgo Press, 2006]
- Various articles at the Center for Visual Music's Online Library
- Oskar Fischinger's Lumigraph at The Fischinger Research site
- Michael Betancourt, Mary Hallock-Greenewalt: The Complete Patents. [Wildside Press, 2005]
- Michael Betancourt, Visual Music Instrument Patents Volume 1. [Borgo Press, 2004]
- Maarten Franssen, "The ocular harpsichord of Louis-Bertrand Castel: The science and aesthetics of an eighteenth-century cause célèbre." [Tractrix: Yearbook for the History of Science, Medicine, Technology and Mathematics 3, 1991, pp. 15–77.]
- Kenneth Peacock, "Instruments to Perform Color-Music: Two Centuries of Technological Exploration." [Leonardo, Vol. 21, No.4, 1988, pp. 397–406]
- Tonino Tornitore, "Giuseppe Arcimboldi E Il Suo Presunto Clavicembalo Oculare." [Revue des Etudes Italiennes, Vol. 31, No. 1–4, 1985, pp. 58–77]
- Austin B. Caswell, The Pythagoreanism of Arcimboldo. [The Journal of Aesthetics and Art Criticism, Vol. 39, No. 2, Winter 1980, pp. 155–161]
- Gregorio Comanini, "Il Figino, overo del fine della pittura." [Trattati D'Arte Del Cinquecento: Fra Manerismo E Controrifroma, Volume Terzo Giuseppe Laterza & Figli, 1962, pp. 238–379]
- Klein, Adrian Bernard, 'Coloured Light An Art Medium' 3rd ed. The Technical Press, London, 1937
- Visual Music and Early Colour organs.
- Rhythmic Light Extensive timeline, history & bibliography
- Light and the Artist 1947 Thomas Wilfed text (PDF)