22L 1s: Difference between revisions

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Created page with "{{Infobox MOS | Periods = 1 | nLargeSteps = 22 | nSmallSteps = 1 | Equalized = 1 | Paucitonic = 1 | Pattern = LLL...22x...LLLs }} 22L 1s is the scale that is most commonly pro..."
 
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| Pattern = LLL...22x...LLLs
| Other names = quartismoid
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22L 1s is the scale that is most commonly produced by stacking the interval of [[33/32]]. If it had a name, it would most probably be alpharabian or quartismoid, since five 33/32s are often equal to 7/6.
{{MOS intro}}
==See also==
This scale is produced by stacking the interval of [[33/32]] (around 53{{c}}).
 
The name '''quartismoid''' is proposed for this pattern since its harmonic entropy minimum corresponds to tempering out the [[quartisma]]—five 33/32s being equated with 7/6. In addition, both [[22edo]] and [[23edo]], extreme ranges of the MOS temper out the quartisma, as well as a large portion of EDOs up to 100-200 which have this scale.
 
== Tuning ranges ==
=== Mavila fifth and 91edo (Ultrasoft and supersoft) ===
Between 4\91 and 1\23, 13 steps amount to a pelog / mavila fifth, which corresponds to the ultrasoft step ratio range. In [[91edo]], the fifth produced by 13 steps of the quartismoid scale is the same as 4 steps of [[7edo]], and thus is the exact boundary between mavila and diatonic. 
 
=== Diatonic fifth (hard of supersoft) ===
From 1\22 to 4\91, 13 steps amount to a diatonic fifth.  
 
If the pure 33/32 is used as a generator, the resulting fifth is 692.54826{{c}}, which puts it in the category around flattone. 
 
==== 700-cent, just, and superpyth fifths (step ratio 7:2 and harder) ====
In 156edo, the fifth becomes the [[12edo]] 700{{c}} fifth. In 200edo, the fifth comes incredibly close to just, as the number 200 is a semiconvergent denominator to the approximation of log2(3/2).
 
When the step ratio is greater than 4.472, then 13 generators amount to a superpyth fifth and the tuning approaches [[22edo]].
 
== Relation to other equal divisions ==
6 steps act as a pseudo-6/5, and when they actually act as 6/5 along with 5 steps being equal to 7/6, [[385/384]] is tempered out. If one were to instead tune in favour of 6/5 instead of 7/6, the resulting hardness would be around 1.233. 114edo and 137edo represent this the best.
 
== Scale properties ==
{{TAMNAMS use}}
 
=== Intervals ===
{{MOS intervals}}
 
=== Generator chain ===
{{MOS genchain}}
 
=== Modes ===
{{MOS mode degrees}}
 
== Scale tree ==
{{MOS tuning spectrum}}
 
== See also ==
* [[33/32]]
* [[33/32]]
* [[33/32 equal-step tuning]]
* [[33/32 equal step tuning]]