Superpiano (Ger.: Lichtelektrisches Klavier)
- Hugh Davies
- and Peter Donhauser
An Electric piano developed by the Viennese architect Emerich Moses Spielmann (b 23 June 1873; d New York, after 1954), and most likely built by the Klavierfabrik Carl Hofmann (owner of the Continental Musikwerke) in Vienna in 1927. It had a seven-octave keyboard and its sounds were generated by means of 12 rotating photoelectric tone-wheels, which were plastic discs carrying concentric rings of transparent sound patterns etched on a blackened background, and each of which produced all the octave registers of a single note (described in the Austrian patent 109,233)....