direct link to the color symphony, but Scriabin's composition must have encouraged these developments.
While Castel's eighteenth-century clavecin oculaire and nineteenth-century innovations such as Rimington's Colour-Organ had been conceived to reveal physical connections between light and sound, most instruments built during the early decades of this century were not intended to express direct association. One exception, however, was a device invented in 1912 by an Australian named Alexander Hector. On his instrument yellow corresponded to middle C—a pitch associated with red by Rimington