Optigan

right|thumb|300px|Keyboard overview of a model 35002 Optigan. The coded strip above the main keyboard corresponded to numbers in the music books for those unable to read music. The Optigan (a portmanteau of optical organ) is an electronic keyboard instrument designed for the consumer market. The name stems from the instrument's reliance on pre-recorded optical soundtracks to reproduce sound. Later versions (built under license and aimed at the professional market) were sold under the name Orchestron.

==Production history== Engineering work on the project began in 1968 and the first patents issued in 1970. The Optigan was released in 1971 by Optigan Corporation, a subsidiary of toy manufacturer Mattel, Incorporated of El Segundo, California with the manufacturing plant located nearby in Compton, California. At least one TV commercial from the era featured the Optigan demonstrated by actor Carl Betz (best known for his role as the father on The Donna Reed Show). The Optigan was promoted in at least one Sears-Roebuck catalog. All rights to the Optigan, the disc format, and all previous discs were sold in 1973 to Miner Industries of New York City, an organ manufacturer who formed a subsidiary, Opsonar, to produce it. Miner had record sales for a time, in part due to Opsonar. However, sales declined shortly thereafter and production of the Optigan and its discs ceased in 1976.