400/399
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Ratio | 400/399 |
Factorization | 2^{4} × 3^{-1} × 5^{2} × 7^{-1} × 19^{-1} |
Monzo | [4 -1 2 -1 0 0 0 -1⟩ |
Size in cents | 4.3335043¢ |
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 (log_{2} nd) | 17.2841 |
Weil height (log_{2} 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 |
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.