25/1

25/1, the 25th harmonic, is the harmonic past 24/1 and before 26/1. It is about four octaves and eight semitones in size. Used in harmony, it sounds particularly wide: if the base note is F1, the higher note will be about C#6. That is for all practical purposes beyond the range of choral music. However, it can be approached as a stack of two 5/1's, making chords like 1-5-25.

Interval information

Ratio	25/1
Factorization	52
Monzo	[0 0 2⟩
Size in cents	5572.627¢
Name	25th harmonic
FJS name	[math]\displaystyle{ \text{A33}^{5,5} }[/math]
Special properties	harmonic
Tenney norm (log2 nd)	4.64386
Weil norm (log2 max(n, d))	9.28771
Wilson norm (sopfr(nd))	10
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See also

• 25/16 – its octave-reduced form