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This development is similar to biological evolution of living species. Usually it was in small steps, shows forking, interdependencies of workshops and occasionally dead ends. Today a few programs survived, on the one hand the German System a gradually advantage of Denner's System, that is played mainly in Germany and Austria. Then there are forks that technically and from the appearance remain German style: the Albert System or simple system it truly is utilized in Jazz and the oriental clarinet, both are such as a German clarinet of around 1870. Shortly after this the German flute maker Theobald Boehm caused two innovations to the device making world:On the one hand, he created a mathematical basis for the best possible calculation of the place of tone holes and on theother hand, he invented the ring key. The ring key makes it feasible to hide a hole larger than the finger that lieson the ring key.

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