Transcript
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Cédric Ringenbach
Math et Musique
Ignite#8Café Dune – 18/10/2010
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Les Harmoniques
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1
2
3
4
5
6 etc.
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LL/2
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LL/3
L/2
L/4L/5
L/6
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x2 x3
Do Do Sol
x1
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x2 x3 x4 x5 x6
Do Do Sol Do Mi Sol
x1
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x2 x3 x4 x5 x6
Do Do Sol Do Mi Sol
Accord Majeur
x1
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x2 x3 x4 x5 x6
Do Do Sol Do Mi Sol
Accord Majeur
x7 x1
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1/7
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Do Mi Sol
Do
Mi
4
5Do
Sol
2
3
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La gamme Chromatique
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Do Ré Mi Fa Sol La Si Do
Do# Mi Fa# Sol Sibb
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Longueur
Fréq
uen
ce
F = 1 / L
k
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k
k12 = 2 k = 12√2
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k
(12√2)4
Do
Mi
Do
Sol (12√2)7
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(12√2)4
(12√2)7
4
5
2
3
Do
Mi
Do
Sol
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(12√2)4
(12√2)7
4
5
2
3
Do
Mi
Do
Sol
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(12√2)7
2
3
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(12√2)4
4
5
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(12√2)4 1,259921
4
51,25
(12√2)7 1,498307
2
31,5
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Fin