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The Theory Of Sound Which Constitutes The Physical Basis Of The Art Of Music.

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180
COMBINATION-TONES
| V111. § 90.
make 100 vibrations per second, and therefore lie exactly one Octave below the graver of the two primary tones. By applying this rule we can deter­mine the pitch of the first-order combination-tone for a pair of simple primaries forming any given in­terval with each other. The following table, copied from Helmholtz's work, shows the results for all the consonant intervals not exceeding one Octave.
In Musical notation the same thing stands thus. the primaries being denoted by minims and the combination-tones by crotchets.
Combination-tones are produced with unusual distinctness by the harmonium. If the primaries
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E-Book - An Annotated Compendium of Old Time American Songs by James Alverson III