Conrad Henfling

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Conrad Henfling (1648–1716 Ansbach, Germany),Leibniz und Der Briefwechsel zwischen Henfling Conrad by Rudolf von Herausgegeben Haase, Vittorio Klostermann, Frankfurt am Main, 1982, {{ISBN|3-465-01534-7}} musicologist, musician, mathematician and lawyerBaierisches Musik-Lexikon by Lipowsky, Felix Joseph, Munich, 1811, page 122. was an official and privy councilor (Hofrat) at the court of the Margrave of Ansbach, Germany. He also invented a new type of keyboard for organ and harpsichord,[http://umb-www-01.u-strasbg.fr/lexis/html/cinscription/Leibniz.html La musique, une pratique cachée de l'arithmétique?] {{webarchive|url=https://archive.today/20130213165834/http://umb-www-01.u-strasbg.fr/lexis/html/cinscription/Leibniz.html |date=13 February 2013 }} by Patrice Bailhace, Studia Leibniztiana, Actes du colloque L'actualité de Leibniz: les deux labyrinthes, Cerisy, 1995 the design of which was extended by Paul von Janko in his 1882 patent for a keyboard layout.[http://www.pianoworld.com/fun/janko.htm Janko Keyboard Piano] {{webarchive|url=https://web.archive.org/web/20030802124256/http://www.pianoworld.com/fun/janko.htm |date=2 August 2003 }} on Piano World

In a letter dated 30 August 1706, he wrote to Gottfried Wilhelm Leibniz dealing with many issues of music theory he sets out detailed calculations for a method of musical temperament, using Euclid's algorithm in his reasoning.[http://plus.maths.org/content/os/issue40/features/wardhaugh/index Musical pitch and Euclid's algorithm] Leibniz had Henfling's work published as "Epistola de novo suo systemate musico" in Miscellanea berolinensia, in 1710.Grove Music Online (Oxford University Press, 2006, acc. 3/21/06) Rudolf Haase