12/11: Difference between revisions

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'''12/11'''
{{Infobox Interval
|2 1 0 0 -1>
| Name = undecimal neutral second, Alpharabian tendoneutral second
| Color name = 1u2, lu 2nd
| Sound = jid_12_11_pluck_adu_dr220.mp3
}}
{{Wikipedia|Neutral second}}


150.63706 cents
'''12/11''', conventionally the '''(lesser) undecimal neutral second''', is an interval found between the 11th and 12th partials of the [[harmonic series]]. In [[just intonation]] it is represented by the [[superparticular ratio]] 12/11, and is about 150.6 [[cent]]s large.


[[File:jid_12_11_pluck_adu_dr220.mp3]] [[:File:jid_12_11_pluck_adu_dr220.mp3|sound sample]]
In [[Alpharabian tuning]] it is known as the '''Alpharabian tendoneutral second''', which contrasts [[88/81]], the other undecimal neutral second.


The (lesser) neutral second is a strangely exotic interval found between the 11th and 12th partials of the harmonic series. In Just Intonation it is represented by the [[superparticular|superparticular]] ratio 12/11, and is about 150.6 [[cent|cents]] large. One step of [[8edo|8edo]] is an excellent approximation of the just neutral second, and eight of them exceed the octave by the comma (12/11)^8/2 = |15 8 0 0 -8>. It follows that EDOs which are multiples of 8, such as [[16edo|16edo]] and [[24edo|24edo]], will also represent this interval well.
The name ''lesser undecimal neutral second'' is said as opposed to [[11/10]], the larger undecimal neutral second or undecimal submajor second (~165 cents), from which it differs by [[121/120]] (~14.4 cents). [[Regular temperament|Temperaments]] which conflate the two (thus [[tempering out]] 121/120) include [[orwell]], [[porcupine]], [[mohajira]], [[valentine]], and their [[support]]ing [[edo]]s: [[15edo]], [[22edo]], [[31edo]], etc.  


12/11 differs from the larger undecimal neutral second 11/10 (~165 cents) by 121/120 (~14.4 cents). Temperaments which conflate the two (thus tempering out 121/120) include [[15edo|15edo]], [[22edo|22edo]], [[31edo|31edo]], [[Orwell|orwell]], [[Porcupine|porcupine]], [[Mohajira|mohajira]] and [[Valentine|valentine]].
Many Western listeners might describe 12/11 as sounding "exotic".
[[Category:11-limit]]
 
[[Category:interval]]
== Approximation ==
[[Category:just_interval]]
One step of [[8edo]] is an excellent approximation of the just neutral second, and eight of them exceed the [[octave]] by the comma [[undecimal octatonic comma|(12/11)<sup>8</sup>/2]] ({{monzo| 15 8 0 0 -8 }}). It follows that edos which are multiples of 8, such as [[16edo]] and [[24edo]], will also represent this interval well.
[[Category:neutral_2nd]]
 
[[Category:ratio]]
{{Interval edo approximation|12/11}}
[[Category:second]]
 
== See also ==
* [[11/6]] – its [[octave complement]]
* [[11/8]] – its [[fifth complement]]
* [[11/9]] – its [[fourth complement]]
* [[Iceface Tuning]]
* [[Gallery of just intervals]]
* [[List of superparticular intervals]]
 
[[Category:Second]]
[[Category:Neutral second]]
[[Category:Over-11 intervals]]