400/399
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Ratio
400/399
Factorization
24 × 3-1 × 52 × 7-1 × 19-1
Monzo
[4 -1 2 -1 0 0 0 -1⟩
Size in cents
4.333504¢
Name
devichroma
Color name
19uryy-2,
nuruyoyo negative 2nd,
Nuruyoyo comma
FJS name
[math]\text{d}{-2}^{5,5}_{7,19}[/math]
Special properties
square superparticular,
reduced
Tenney height (log2 nd)
17.2841
Weil height (log2 max(n, d))
17.2877
Wilson height (sopfr(nd))
47
Harmonic entropy
(Shannon, [math]\sqrt{nd}[/math])
~1.37265 bits
Comma size
small
S-expression
S20
open this interval in xen-calc
| Interval information |
nuruyoyo negative 2nd,
Nuruyoyo comma
reduced
(Shannon, [math]\sqrt{nd}[/math])
400/399, the devichroma is a 19-limit (also 2.3.5.7.19 subgroup) superparticular comma of about 4.33 cents. It is the difference between undevicesimal chroma, 20/19 and large septimal chroma, 21/20. By tempering it out is defined the devichromic temperament, which enables the devichromic chords.
Etymology
The name devichroma was named by Xenllium in 2023. It is a contraction of undevicesimal chroma into a single word.