PERFECTFOURTH

Perfect fourth

In classical music from Western culture, a fourth is a musical interval encompassing four staff positions, and the perfect fourth is a fourth spanning five semitones . For example, the ascending interval from C to the next F is a perfect fourth, as the note F lies five semitones above C, and there are four staff positions from C to F. Diminished and augmented fourths span the same number of staff positions, but consist of a different number of semitones .

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perfect fourth

Noun

  1. A musical interval of the Western twelve-semitone system consisting of five semitones and spanning four degrees of the diatonic scale. It is enharmonically equivalent to an augmented third.
    The perfect fourth has a pitch ratio close to 4:3.


The above text is a snippet from Wiktionary: perfect fourth
and as such is available under the Creative Commons Attribution/Share-Alike License.

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