Boehm system (clarinet)

The Boehm system for the clarinet is a system of clarinet keywork, developed between 1839 and 1843 by Hyacinthe Klosé and Auguste Buffet jeune. The name is somewhat deceptive; the system was inspired by Theobald Boehm's system for the flute, but necessarily differs from it, since the clarinet overblows at the twelfth rather than the flute's octave. Boehm himself was not involved in its development. Klosé and Buffet took the standard soprano clarinet, adapted the ring and axle keywork system to correct serious intonation issues on both the upper and lower joints of the instrument, and added duplicate keys for the left and right little fingers, simplifying several difficult articulations throughout the range of the instrument.