In 1825, flutist T. Boehm flute for improved cross-section tubes and valves of the system design, in addition, they made various additions to the mechanism of the instrument.
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The essence of such a system is this: if the flute was treated the same design as the tool and its diatonic major scale of the holes were given D-dur.
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And chromatic semitones obtained by opening the side of additional valves, the design of his flute line between the main ports and additional valves to a large extent worn off, because all the holes were made in a row and covered with flaps.
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When playing the flute this design employed nine fingers (four fingers of his right hand and five fingers of the left). The mechanics of the flute flutist rich variety of adjusting levers, automatically closing certain combinations of valves when you click on one of them, she had a strong influence on the design of clarinet and oboe, and in some cases even completely turned on them.
Currently, the flute is a tube of cylindrical cross section, which is composed of three parts. In its upper part - the head - there is a hole with sharp edges (often with a special, uplifting edge of plate) through which air is blown. One side of the head clogged pull a cork, which is used to tune the instrument. Jam is regulated not only the absolute height of instrument failure, but to some extent, altitude, and sound relationships between the tones sound a number of flutes. Setting up the instrument for orchestral tuning fork is reached, moreover, by the nomination of a whole head. In the middle of the flute are all key, located in the open valves, which employed nine fingers involved in the game on this instrument. Right thumb supports a flute sound holes on the opposite side.