Kees (Cornelis) van Prooijen (born 7 August 1952) is a creator of computer art.Kees van Prooijen Homepage Although it does not bear his name, he independently discovered the Bohlen–Pierce scale,Kees van Prooijen: "A Theory of Equal-Tempered Scales". Interface, Vol. 7 (1978), pp. 45–56. Swets & Zeitlinger B.V. – Amsterdam.Kees van Prooijen. "13 tones in the 3rd harmonic", kees.cc. a non-octave-repeating scale based on the tritave and spectra containing odd harmonics, in 1978. Van Prooijen came across the scale through an investigation of continued fractions."What Were They Investigating?", Bohlen–Pierce Site.Sethares, William A. (2005). Tuning, Timbre, Spectrum, Scale, p.74. .Schroeder, Manfred. "Music and Mathematics", p.14. Nova Acta Leopoldina N.F. 92, Nr. 341, (Halle, 2005), pp. 9–15.
He also invented the Kees height, or an "expressibility" measure for complexity of just intonation pitch classes.
Sources
Further reading Wolfgang Auhagen, ed. (2005). Science and Music: The Impact of Music: Leopoldina Symposium, Halle/Saale, May 13 to 15, 2004, . Deutsche Akademie der Naturforscher Leopoldina. .