1521/1520

Interval information

Ratio	1521/1520
Factorization	2-4 × 32 × 5-1 × 132 × 19-1
Monzo	[-4 2 -1 0 0 2 0 -1⟩
Size in cents	1.138595¢
Name	pinkanberry comma
Color name	19u3oog1, nuthothogu unison
FJS name	[math]\displaystyle{ \text{d1}^{13,13}_{5,19} }[/math]
Special properties	square superparticular, reduced
Tenney height (log2 nd)	21.1407
Weil height (log2 max(n, d))	21.1416
Wilson height (sopfr(nd))	64
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1521/1520, the pinkanberry comma, is a 19-limit unnoticeable comma and essential tempering comma, specifically of the 2.3.5.13.19 subgroup. Among other things, it is the difference between 20/19 and a stack of two 40/39s, as well as the difference between two other essential tempering commas, 676/675 and 1216/1215.

It is named for the fact that the latter two commas define pinkan temperament, making the tempering of 1521/1520 its most prominent "fruit", and thus tempering it out enables the pinkanberry chords. EDOs that support these include 24, 27, 53, 77, 84, 111, 130, 137, 164, 190, 217, 243, 270, 323, 407, 460, and 513.

See also

• Unnoticeable comma
• List of superparticular intervals