441/440

Interval information

Ratio	441/440
Factorization	2-3 × 32 × 5-1 × 72 × 11-1
Monzo	[-3 2 -1 2 -1⟩
Size in cents	3.930158¢
Name	werckisma
Color name	Luzozogu
FJS name	[math]\displaystyle{ \text{m2}^{7,7}_{5,11} }[/math]
Special properties	square superparticular, reduced
Tenney height (log2 nd)	17.566
Weil height (log2 max(n, d))	17.5693
Wilson height (sopfr(nd))	42
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441/440, also known as Werckmeister's undecimal septenarian schisma, or more simply, the werckisma, is a small superparticular 11-limit comma with a size of roughly 3.93 cents. It is the difference between 21/20 and 22/21, as well as the amount by which a stack of two 21/16 septimal subfourths exceeds a single 55/32 supermajor sixth. It is also the difference between a stack of a 10/9 and an 8/7, and a single 14/11. Tempering it out splits 11/10 into two even halves, equates 21/16 with 55/42 to create some interesting-sounding triads, and, makes werckismic chords possible.

See also

• Werckismic chords
• Werckismic temperaments
• Small comma
• List of superparticular intervals