The clarinet was invented in the late 1600′s and credit is given to Johann Christoph Denner of Germany and his son for developing its initial design. During the 1700′s the clarinet underwent some changes as people experimented with different tone holes and adjusted the keys to see how it would change the tone. It was during this period they added the register key. By the 1800′s the clarinet adopted the same fingering system as the flute, the Boehm system. This system was based on a mathematical equation that placed the tone holes in a precise location so each note could play in tune.