Electric organ will play in colors

Gregory Benford : science fiction author and astrophysicist
Degrees of emotion from placid contentment to intense manifestations are vividly expressed by color parts used in connection with orchestral music in some of the greatest concert halls of the world. This image depicts a color phase as it appears to the spectator-listener.

GREGORY BENFORD, Popular Mechanics, (2012), "The Future That Never Was: Pictures from the Past', [online], Available: http://www.popularmechanics.com/technology/engineering/future-that-never-was-next-gen-tech-concepts?click=main_sr#slide-1