27/1

Interval information

Ratio	27/1
Factorization	33
Monzo	[0 3⟩
Size in cents	5705.865¢
Name	27th harmonic
Color name	c4w6 quadcowa 6th
FJS name	[math]\text{M34}[/math]
Special properties	harmonic
Tenney height (log2 nd)	4.75489
Weil height (log2 max(n, d))	9.50978
Wilson height (sopfr(nd))	9
Harmonic entropy (Shannon, [math]\sqrt{nd}[/math])	~2.12236 bits
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27/1, the 27th harmonic, is the harmonic past 26/1 and before 28/1. It is about four octaves and nine semitones in size. Used in harmony, it sounds particularly wide: if the base note is F1, the higher note will be about D6. That is for all practical purposes beyond the range of choral music. However, it remains useful in some instrumental solos and ensembles. It can be approached as a stack of three 3/1's, making chords like 1-3-9-27.

See also

• 27/16 – its octave-reduced form