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Etienne Loulie first creates an adjustable pendulum . Hoever, it does not produce any sound and did not include a way to keep the pendulum swinging.
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Dietrich Nikolaus Winkel inventst the more familiar mechanical metronome.
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Johann Maelzel incorporates Winkel's ideas into his own machine, and added a scale. He began producing and selling them under the name " Mealzel's Metronome"
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Ludwig Van Beethoven is the first major composer to inlude metronome markings in his music.
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Galilleo Galili experiments with pendulums
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Abbas Ibn Firnas makes a first try at creating a "some sort of metronome"