21/19
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Ratio
21/19
Factorization
3 × 7 × 19-1
Monzo
[0 1 0 1 0 0 0 -1⟩
Size in cents
173.2679¢
Names
hendrix major second,
undevicesimal submajor second,
undevicesimal supraneutral second
Color name
19uz2, nuzo 2nd
FJS name
[math]\text{M2}^{7}_{19}[/math]
Special properties
reduced
Tenney height (log2 nd)
8.64024
Weil height (log2 max(n, d))
8.78463
Wilson height (sopfr(nd))
29
Harmonic entropy
(Shannon, [math]\sqrt{nd}[/math])
~4.21455 bits
[sound info]
open this interval in xen-calc
| Interval information |
undevicesimal submajor second,
undevicesimal supraneutral second
(Shannon, [math]\sqrt{nd}[/math])
[sound info]
In 19-limit just intonation, 21/19 is the hendrix major second, also known as the undevicesimal submajor second or undevicesimal supraneutral second. It falls short of the Pythagorean major second (9/8) by a hendrix comma (57/56).