The sensational style of Prometheus is augmented by the use of a color machine which flashes upon a screen hues supposed to supplement the various moods of the music. How many of these experiments will be incorporated into the accepted idiom of music, time alone will tell; but they prove conclusively that modern music is thoroughly awake and is proving true to that spirit of freedom which is the breath of its being.
Page 327. - Quotes from Music: An Art and a Language - The Varied Tendencies of Modern Music (Ch. XX)