| 21. | Thus, they are a mirror image of the harmonic series, the undertone series.
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| 22. | It is limited to notes within the harmonic series because the embouchure controls the pitch.
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| 23. | This unintended connection to tonality can be explained by the harmonic series and musical phonology.
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| 24. | Together they form the harmonic series.
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| 25. | Recent efforts include a considerably revised view of the structure and genesis of the harmonic series.
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| 26. | Rigorous proofs require proper and more careful treatment of the divergent terms of the harmonic series.
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| 27. | Other notes between the harmonic series notes are achieved by positioning a hand in the bell.
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| 28. | This satisfies the recurrence relation of a partial sum of the harmonic series, thus implying the formula
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| 29. | His String Quartet No . 9 uses intervals of the harmonic series as high as the 31st partial.
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| 30. | The trembita has no lateral openings and therefore gives the pure natural harmonic series of the open pipe.
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