Anton Joseph Hampel
Anton Joseph (A. J.) Hampel (1710 – 30 March 1771) was a horn player who is generally credited with having developed, somewhere between 1750 and 1760, the technique of hand-stopping which allows natural horns to play fully chromatically. This was one of the most important innovations in the history of the horn, comparable with Heinrich Stölzel's development of the first valve horn in 1817.
Hampel was born in Prague, but worked in Dresden, Germany, with instrument maker Johann Georg Werner, collaborating on the design of the so-called Inventionshorn, which used sliding medial crooks inside the hoop in an attempt to achieve a fully chromatic instrument.
- CIMCIM, Edinburgh University
- The Evolution of the Modern French Horn from 1750 to the Present Day, R. Morley-Pegge, Proceedings of the Musical Association, 69th Sess., 1942 - 1943 (1942 - 1943), pp. 34–55