also: かんぜんよど
perfect fourth
A musical interval spanning four diatonic scale degrees, equivalent to five semitones. Used in music theory and analysis.
A perfect fourth is the interval from C to F.
The beginning of this piece starts with a leap of a perfect fourth.
完全五度 is a perfect fifth (seven semitones), while 完全四度 is a perfect fourth (five semitones).
増四度 is an augmented fourth (six semitones), also called a tritone, whereas 完全四度 is a perfect fourth.
Standard music theory term; the reading かんぜんよんど is the most common.
Alternate reading; less common but still used in some music contexts.
Compound of 完全 (perfect) and 四度 (fourth), a calque from Western music theory terminology.