The Colour Organ was a standard harpsichord with 60 small windows of coloured glass panels. In correspondent to the sound the glass panels would illuminate.
The term ‘colour organ’ became very popular in the 60’s and 70’s as it was often used to create light shows where electronic devices would respond to music inputs.
A version of the colour organ was also used in the movie Close Encounters of the Third Kind, being used as a device to communicate with the alien spaceship.
A similar object can be seen in the 1964 sci-fi movie The Time Travelers.
In this the Lumigraph became the Lumichord and is often mistaken for a colour organ. It was in invented in the late 1940’s by Oskar Fischinger who was an animator, film maker and painter.