30/19: Difference between revisions

Expansion according to its octave complement
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{{Infobox Interval
{{Infobox Interval
| JI glyph =
| Name = small undevicesimal minor sixth, Eratosthenes' minor sixth
| Ratio = 30/19
| Color name = 19uy5, nuyo 5th
| Monzo = 1 1 1 0 0 0 0 -1
| Cents = 790.75570
| Name = small undevicesimal minor sixth, <br>Eratosthenes' minor sixth
| Color name =  
| FJS name = A5<sup>5</sup><sub>19</sub>
| Sound = jid_30_19_pluck_adu_dr220.mp3
| Sound = jid_30_19_pluck_adu_dr220.mp3
}}
}}


'''30/19''', the '''small undevicesimal minor sixth''' or '''Eratosthenes' minor sixth''' is a [[19-limit]] interval, 790.8 [[cent]]s in size, that is flatter than the [[128/81|Pythagorean minor sixth]] by the ''password'' aka ''Eratosthenes' comma'' ([[1216/1215]]), an [[unnoticeable comma]] of about 1.4243 cents.
'''30/19''', the '''small undevicesimal minor sixth''' is a [[19-limit]] interval, 790.8 [[cent]]s in size. In the [[Functional Just System]] and [[Helmholtz-Ellis notation]], it is an ''augmented fifth'', obtained by subtracting [[81/80]] and [[513/512]] from the [[6561/4096|Pythagorean augmented fifth]], but it may be called the '''Eratosthenes' minor sixth''' as it is flatter than the [[128/81|Pythagorean minor sixth]] by the ''password'' aka ''Eratosthenes' comma'' ([[1216/1215]]), an [[unnoticeable comma]] of about 1.4243 cents.


== See also ==
== See also ==
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* [[Gallery of just intervals]]
* [[Gallery of just intervals]]


[[Category:19-limit]]
[[Category:Sixth]]
[[Category:Interval]]
[[Category:Minor sixth]]
[[Category:Minor sixth]]
[[Category:Sixth]]
[[Category:Eratosthenes]]
[[Category:Eratosthenes]]