Last Updated
：2025/11/26
perfect fourth
Noun
Japanese Meaning
完全四度：西洋音楽の十二平均律体系において、五半音から成る音程であり、ダイアトニック・スケール上で四つの音階にまたがる音程（増三度と同音となる）。
（ plural ）
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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.
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perfect fourth
When tuning a guitar, the standard intervals between most strings are a perfect fourth, which helps maintain chord shapes across the fretboard.
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When tuning a guitar, the standard intervals between most strings are a perfect fourth, which helps maintain chord shapes across the fretboard.
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