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Fingering tablature for quarter tones
1. Whistle tones
With an open but at the same time controlled embouchure and a very low air pressure it is possible to play Whistle tones. Sometimes you obtain this sound when you decrease the air pressure playing a low note on the flute. Whistle notes are easiest to control in the third octave, where you use the original fingerings.
Many different notations are used, for instance:
2. Trumpet sound
With compressed lips, as playing a brass instrument, it is possible to play
a. in the hole of the mouthpiece
b. in the flute, removing the mouthpiece
Written:
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3.Strong air stream without tone
By closing the whole mouthpiece with the mouth and blowing with great force directly and without tone into the instrument, you will obtain a sound similar to "aeolian sounds", but louder and with a more whistling character.
The sound is also called "Jet Whistle", according to the work for flute and violoncello by Villa-Lobos. The effect may also be combined with an inhalation through the flute.
It is often used together with scale movements, and is then written:
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