14/13: Difference between revisions

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Included the name of the comma that acts as the difference between a stack of three 14/13 intervals and a 5/4 Major 3rd.
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'''14/13'''
{{Infobox Interval
|1 0 0 1 0 -1>
| Name = tridecimal 2/3-tone, trienthird, tridecimal supraminor second, sinaic
| Color name = 3uz2, thuzo 2nd
| Sound = jid_14_13_pluck_adu_dr220.mp3
}}


128.29824 cents
'''14/13''', the '''tridecimal 2/3-tone''' or '''trienthird''' (one-third third) is a somewhat exotic 13-limit interval measuring about 128.3¢, which is almost exactly 1/3 of a [[5/4]] major third- a stack of three trienthirds falling short of a 5/4 major third by a [[10985/10976|cantonisma]].


[[File:jid_14_13_pluck_adu_dr220.mp3]] [[:File:jid_14_13_pluck_adu_dr220.mp3|sound sample]]
The trienthird was a favorite interval of [[Wikipedia:Avicenna|Avicenna]] (Ibn Sina) for his scale constructions, and may be considered a smaller size of neutral second (a second between major and minor). Thus intervals close in size to it have been called '''sinaics''' by [[Zhea Erose]]. It may be called the '''tridecimal supraminor second''' as well, analogous to [[21/13]] being the ''tridecimal supraminor sixth''.


14/13, the 2/3-tone or trienthird (one-third third) interval is a somewhat exotic 13-limit interval which, measuring about 128.3¢, is almost exactly 1/3 of a major third of [[5/4|5/4]]. The cantonisma- (5/4)/(14/13)^3 = 10985/10976- is tempered out in such notable [[EDO|EDO]]s as 46, 84, 94, 103, 111, 121, 130, 159, 224, 270, 494 and 764, leading to a variety of temperaments in which three trienthirds make up a major third.
In [[13-limit]] [[just intonation]], 14/13 represents the difference in size between the tridecimal minor third of [[13/11]] and undecimal major third of [[14/11]]. It is also the difference between [[13/10]] and [[7/5]]; [[13/12]] and [[7/6]]; [[13/9]] and [[14/9]], and of course [[13/8]] and [[7/4]] and the inversions of the above. As it combines the primes 7 and 13, it appears in JI subgroup tunings involving those primes.


The trienthird was a favorite interval of [http://en.wikipedia.org/wiki/Avicenna Avicenna] (Ibn Sina) for his scale constructions, and may be considered a smaller size of neutral second (a second between major and minor.)
== See also ==
* [[13/7]] – its [[octave complement]]
* [[Gallery of just intervals]]


In [[13-limit|13-limit]] [[Just_intonation|Just Intonation]], 14/13 represents the difference in size between the tridecimal minor third of [[13/11|13/11]] and tridecimal supermajor third of [[14/11|14/11]]. It is also the difference between [[13/10|13/10]] and [[7/5|7/5]]; [[13/12|13/12]] and [[7/6|7/6]]; [[13/9|13/9]] and [[14/9|14/9]], and of course [[13/8|13/8]] and [[7/4|7/4]] and the inversions of the above. As it combines the primes 7 and 13, it appears in JI subgroup tunings involving those primes.
[[Category:Second]]
 
[[Category:Neutral second]]
See: [[Gallery_of_Just_Intervals|Gallery of Just Intervals]]     
[[Category:Supraminor second]]
[[Category:13-limit]]
[[Category:Semitone]]
[[Category:interval]]
[[Category:just_interval]]
[[Category:ratio]]
[[Category:second]]