Fractional-octave temperaments: Difference between revisions

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The most common way to produce a fractional-octave temperament is through an excellent approximation of an interval relative to the size of the wireframe edo. For example, [[compton family]] tempers out the Pythagorean comma and maps 7 steps of 12edo to [[3/2]]. Likewise, a lot of 10th-octave temperaments have a [[13/8]] as 7\10, and 26th-octave temperaments often have a [[7/4]] for 21\26.
The most common way to produce a fractional-octave temperament is through an excellent approximation of an interval relative to the size of the wireframe edo. For example, [[compton family]] tempers out the Pythagorean comma and maps 7 steps of 12edo to [[3/2]]. Likewise, a lot of 10th-octave temperaments have a [[13/8]] as 7\10, and 26th-octave temperaments often have a [[7/4]] for 21\26.


However, an equal division does not have to be harmonically decent to be a wireframe for a fractional-octave temperament. If an equal division has multiples which are high in consistency or are zeta equal divisions or otherwise harmonically strong, it can produce a lot of such temperaments - notable examples being [[20edo]] or [[32edo]]. Likewise, proximity of a step of equal division to a comma is often a source of these temperaments - for example [[56edo]]'s step being directly close to [[81/80]], and 44edo's step being extremely close to [[64/63]].
However, an equal division does not have to be harmonically decent to be a wireframe for a fractional-octave temperament. If an equal division has multiples which are high in consistency or are zeta equal divisions or otherwise harmonically strong, it can produce a lot of such temperaments—notable examples being [[20edo]] or [[32edo]]. Likewise, proximity of a step of equal division to a comma is often a source of these temperaments—for example [[56edo]]'s step being directly close to [[81/80]], and 44edo's step being extremely close to [[64/63]].


=== Disagreement between temperament catalog strategy and fractional-octave practice ===
=== Disagreement between temperament catalog strategy and fractional-octave practice ===
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== Individual pages of temperaments by subtending equal division ==
== Individual pages of temperaments by subtending equal division ==


=== 2 to 40 ===
=== 2 to 100 ===
Many pages are yet to be created.
Many pages are yet to be created.
{| class="wikitable"
{| class="wikitable"
|+
|+
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|[[2nd-octave temperaments|2]]
| [[2nd-octave temperaments|2]]
|[[3rd-octave temperaments|3]]
| [[3rd-octave temperaments|3]]
|[[4th-octave temperaments|4]]
| [[4th-octave temperaments|4]]
|[[5th-octave temperaments|5]]
| [[5th-octave temperaments|5]]
|[[6th-octave temperaments|6]]
| [[6th-octave temperaments|6]]
|[[7th-octave temperaments|7]]
| [[7th-octave temperaments|7]]
|[[8th-octave temperaments|8]]
| [[8th-octave temperaments|8]]
|[[9th-octave temperaments|9]]
| [[9th-octave temperaments|9]]
|[[10th-octave temperaments|10]]
| [[10th-octave temperaments|10]]
|-
|-
|[[11th-octave temperaments|11]]
| [[11th-octave temperaments|11]]
|[[12th-octave temperaments|12]]
| [[12th-octave temperaments|12]]
|[[13th-octave temperaments|13]]
| [[13th-octave temperaments|13]]
|[[14th-octave temperaments|14]]
| [[14th-octave temperaments|14]]
|[[15th-octave temperaments|15]]
| [[15th-octave temperaments|15]]
|[[16th-octave temperaments|16]]
| [[16th-octave temperaments|16]]
|[[17th-octave temperaments|17]]
| [[17th-octave temperaments|17]]
|[[18th-octave temperaments|18]]
| [[18th-octave temperaments|18]]
|[[19th-octave temperaments|19]]
| [[19th-octave temperaments|19]]
|[[20th-octave temperaments|20]]
| [[20th-octave temperaments|20]]
|-
|-
|[[21st-octave temperaments|21]]
| [[21st-octave temperaments|21]]
|[[22nd-octave temperaments|22]]
| [[22nd-octave temperaments|22]]
|[[23rd-octave temperaments|23]]
| [[23rd-octave temperaments|23]]
|[[24th-octave temperaments|24]]
| [[24th-octave temperaments|24]]
|[[25th-octave temperaments|25]]
| [[25th-octave temperaments|25]]
|[[26th-octave temperaments|26]]
| [[26th-octave temperaments|26]]
|[[27th-octave temperaments|27]]
| [[27th-octave temperaments|27]]
|[[28th-octave temperaments|28]]
| [[28th-octave temperaments|28]]
|[[29th-octave temperaments|29]]
| [[29th-octave temperaments|29]]
|[[30th-octave temperaments|30]]
| [[30th-octave temperaments|30]]
|-
|-
|[[31st-octave temperaments|31]]
| [[31st-octave temperaments|31]]
|[[32nd-octave temperaments|32]]
| [[32nd-octave temperaments|32]]
|[[33rd-octave temperaments|33]]
| [[33rd-octave temperaments|33]]
|[[34th-octave temperaments|34]]
| [[34th-octave temperaments|34]]
|[[35th-octave temperaments|35]]
| [[35th-octave temperaments|35]]
|[[36th-octave temperaments|36]]
| [[36th-octave temperaments|36]]
|[[37th-octave temperaments|37]]
| [[37th-octave temperaments|37]]
|[[38th-octave temperaments|38]]
| [[38th-octave temperaments|38]]
|[[39th-octave temperaments|39]]
| [[39th-octave temperaments|39]]
|[[40th-octave temperaments|40]]
| [[40th-octave temperaments|40]]
|-
| [[41st-octave temperaments|41]] / [[Countercomp family|C]]
| [[42nd-octave temperaments|42]]
| [[43rd-octave temperaments|43]]
| [[44th-octave temperaments|44]]
| [[45th-octave temperaments|45]]
| [[46th-octave temperaments|46]]
| [[47th-octave temperaments|47]]
| [[48th-octave temperaments|48]]
| [[49th-octave temperaments|49]]
| [[50th-octave temperaments|50]]
|-
| [[51st-octave temperaments|51]]
| [[52nd-octave temperaments|52]]
| [[53rd-octave temperaments|53]] / [[Mercator family|M]]
| [[54th-octave temperaments|54]]
| [[55th-octave temperaments|55]]
| [[56th-octave temperaments|56]]
| [[57th-octave temperaments|57]]
| [[58th-octave temperaments|58]]
| [[59th-octave temperaments|59]]
| [[60th-octave temperaments|60]]
|-
| [[61st-octave temperaments|61]]
| [[62nd-octave temperaments|62]]
| [[63rd-octave temperaments|63]]
| [[64th-octave temperaments|64]]
| [[65th-octave temperaments|65]]
| [[66th-octave temperaments|66]]
| [[67th-octave temperaments|67]]
| [[68th-octave temperaments|68]]
| [[69th-octave temperaments|69]]
| [[70th-octave temperaments|70]]
|-
| [[71st-octave temperaments|71]]
| [[72nd-octave temperaments|72]]
| [[73rd-octave temperaments|73]]
| [[74th-octave temperaments|74]]
| [[75th-octave temperaments|75]]
| [[76th-octave temperaments|76]]
| [[77th-octave temperaments|77]]
| [[78th-octave temperaments|78]]
| [[79th-octave temperaments|79]]
| [[80th-octave temperaments|80]]
|-
| [[81st-octave temperaments|81]]
| [[82nd-octave temperaments|82]]
| [[83rd-octave temperaments|83]]
| [[84th-octave temperaments|84]]
| [[85th-octave temperaments|85]]
| [[86th-octave temperaments|86]]
| [[87th-octave temperaments|87]]
| [[88th-octave temperaments|88]]
| [[89th-octave temperaments|89]]
| [[90th-octave temperaments|90]]
|-
| [[91st-octave temperaments|91]]
| [[92nd-octave temperaments|92]]
| [[93rd-octave temperaments|93]]
| [[94th-octave temperaments|94]]
| [[95th-octave temperaments|95]]
| [[96th-octave temperaments|96]]
| [[97th-octave temperaments|97]]
| [[98th-octave temperaments|98]]
| [[99th-octave temperaments|99]]
| [[100th-octave temperaments|100]]
|}
|}


=== 40 and up ===
=== 101 and up ===
[[41st-octave temperaments|41]] ([[Countercomp family|c*]]), [[44th-octave temperaments|44]], [[45th-octave temperaments|45]], [[46th-octave temperaments|46]], [[Mercator family|53**]], [[56th-octave temperaments|56]], [[59th-octave temperaments|59]], [[60th-octave temperaments|60]], [[61st-octave temperaments|61]], [[65th-octave temperaments|65]], [[69th-octave temperaments|69]], [[72nd-octave temperaments|72]], [[77th-octave temperaments|77]], [[79th-octave temperaments|79]], [[80th-octave temperaments|80]], [[87th-octave temperaments|87]], [[91st-octave temperaments|91]], [[97th-octave temperaments|97]], [[111th-octave temperaments|111]], [[118th-octave temperaments|118]], [[159th-octave temperaments|159]], [[400th-octave temperaments|400]], [[665th-octave temperaments|665]]
[[111th-octave temperaments|111]], [[118th-octave temperaments|118]], [[159th-octave temperaments|159]], [[400th-octave temperaments|400]], [[665th-octave temperaments|665]]
 


<nowiki>*</nowiki> Countercomp family
C = Countercomp family


<nowiki>**</nowiki> Mercator family equated with 53rd-octave temperaments until otherwise discovered, also contains 106th-octave temperaments
M = Mercator family equated with 53rd-octave temperaments until otherwise discovered, also contains 106th-octave temperaments


== Temperaments discussed elsewhere ==
== Temperaments discussed elsewhere ==
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** [[Landscape microtemperaments|Landscape temperaments]]
** [[Landscape microtemperaments|Landscape temperaments]]
* 1\4 period temperaments
* 1\4 period temperaments
** [[Dimipent family|Diminished temperaments]]
** [[Diminished family|Diminished temperaments]]
** [[Undim family|Undim temperaments]]
** [[Undim family|Undim temperaments]]
* 1\5 period temperaments
* 1\5 period temperaments
** [[Pental family|Pental temperaments]]
** [[Quintile family|Quintile temperaments]]
** [[Quintosec family|Quintosec temperaments]]
** [[Quintosec family|Quintosec temperaments]]
** [[Trisedodge family|Trisedodge temperaments]]
** [[Trisedodge family|Trisedodge temperaments]]
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** [[Stearnsmic clan #Stearnscape|Stearnscape]]
** [[Stearnsmic clan #Stearnscape|Stearnscape]]
* [[Akjaysma|Akjaysmic temperaments]] (1\7 period)
* [[Akjaysma|Akjaysmic temperaments]] (1\7 period)
**[[Ragismic microtemperaments #Brahmagupta|Brahmagupta]]
** [[Ragismic microtemperaments #Brahmagupta|Brahmagupta]]
** [[Schismatic family #Septant|Septant]]
** [[Schismatic family #Septant|Septant]]
** [[Apotome family #Whitewood|Whitewood]]
** [[Whitewood family #Whitewood|Whitewood temperaments]]
** [[Keemic temperaments #Sevond|Sevond]]
** [[Keemic temperaments #Sevond|Sevond]]
** [[Mistismic temperaments #Neutron|Neutron]]
** [[Mistismic temperaments #Neutron|Neutron]]
* [[Ragismic microtemperaments #Octoid|Octoid]], [[Schismatic family #Octant|octant]] (1\8 period)
* [[Ragismic microtemperaments #Octoid|Octoid]], [[Schismatic family #Octant|octant]] (1\8 period)
* [[Tritrizo clan|Tritrizo temperaments]] (1\9 period)
* [[Septiennealimmal clan|Septiennealimmal temperaments]] (1\9 period)
** [[Ragismic microtemperaments #Ennealimmal|Ennealimmal]]
** [[Ragismic microtemperaments #Ennealimmal|Ennealimmal]]
** [[Augmented family #Niner|Niner]]
** [[Augmented family #Niner|Niner]]
** [[Marvel temperaments #Enneaportent|Enneaportent]]
** [[Marvel temperaments #Enneaportent|Enneaportent]]
** [[Kleismic family #Novemkleismic|Novemkleismic]]
** [[Kleismic family #Novemkleismic|Novemkleismic]]
* [[15/14 equal-step tuning|Linus temperaments]] (1\10 period)
* [[Linus]] temperaments (1\10 period)
** [[Breedsmic temperaments #Decoid|Decoid]]
** [[Breedsmic temperaments #Decoid|Decoid]]
** [[Ragismic microtemperaments #Deca|Deca]]
** [[Ragismic microtemperaments #Deca|Deca]]
** [[Cloudy clan #Decic|Decic]]
** [[Cloudy clan #Decic|Decic]]
** [[Stearnsmic clan #Decistearn|Decistearn]]
** [[Stearnsmic clan #Decistearn|Decistearn]]
** [[Pental family #Decal|Decal]]
** [[Quintile family #Decile|Decile]]
** [[Vishnuzmic family #Decavish|Decavish]]
** [[Vishnuzmic family #Decavish|Decavish]]
** [[Metric microtemperaments #Decimetra|Decimetra]]
** [[Metric microtemperaments #Decimetra|Decimetra]]
* [[Porwell temperaments #Hendecatonic|Hendecatonic]], [[Keemic temperaments #Undeka|undeka]] (1\11 period)
* [[Porwell temperaments #Hendecatonic|Hendecatonic]] (1\11 period)
* [[Compton family|Compton]], [[Very high accuracy temperaments #Atomic|atomic]] (1\12 period)
* [[Compton family|Compton]], [[Very high accuracy temperaments #Atomic|atomic]] (1\12 period)
* [[Orwellismic temperaments #Triskaidekic|Triskaidekic]], [[Octagar temperaments #Tridecatonic|tridecatonic]], [[Ragismic microtemperaments #Trideci|trideci]], [[aluminium]] (1\13 period)
* [[Orwellismic temperaments #Triskaidekic|Triskaidekic]], [[Octagar temperaments #Tridecatonic|tridecatonic]], [[Ragismic microtemperaments #Trideci|trideci]], [[aluminium]] (1\13 period)
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* [[Ragismic microtemperaments #Octoid|Hexadecoid]], [[Jubilismic clan #Sedecic|sedecic]] (1\16 period)
* [[Ragismic microtemperaments #Octoid|Hexadecoid]], [[Jubilismic clan #Sedecic|sedecic]] (1\16 period)
* [[Ragismic microtemperaments #Chlorine|Chlorine]] (1\17 period)
* [[Ragismic microtemperaments #Chlorine|Chlorine]] (1\17 period)
* [[Ragismic microtemperaments #Ennealimmal|Hemiennealimmal]] (1\18 period)
* [[Septiennealimmal clan #Ennealimmal|Hemiennealimmal]] (1\18 period)
* [[Ragismic microtemperaments #Enneadecal|Enneadecal]], [[Meantone family #Meanmag|meanmag]] (1\19 period)
* [[Ragismic microtemperaments #Enneadecal|Enneadecal]], [[Meantone family #Meanmag|meanmag]] (1\19 period)
* [[Hemimage temperaments #Degrees|Degrees]] (1\20 period)
* [[Hemimage temperaments #Degrees|Degrees]] (1\20 period)
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* [[Porwell temperaments #Icositritonic|Icositritonic]] (1\23 period)
* [[Porwell temperaments #Icositritonic|Icositritonic]] (1\23 period)
* [[Compton family #Hours|Hours]], [[chromium]] (1\24 period)
* [[Compton family #Hours|Hours]], [[chromium]] (1\24 period)
* [[Ragismic microtemperaments #Ennealimmal|Trinealimmal]], [[Tritrizo clan #Cobalt|cobalt]] (1\27 period)
* [[Septiennealimmal clan #Ennealimmal|Trinealimmal]], [[Tritrizo clan #Cobalt|cobalt]] (1\27 period)
* [[Horwell temperaments #Oquatonic|Oquatonic]] (1\28 period)
* [[Horwell temperaments #Oquatonic|Oquatonic]] (1\28 period)
* [[Hemifamity temperaments #Mystery|Mystery]], [[Copper comma|copper]] (1\29 period)
* [[Hemifamity temperaments #Mystery|Mystery]], [[Copper comma|copper]] (1\29 period)
* [[31st-octave temperaments|Birds]] (1\31 period)
* [[31st-octave temperaments|Birds]] (1\31 period)
* [[Compton family #Decades|Decades]] (1\36 period)
* [[Compton family #Gamelstearn|Gamelstearn]] (1\36 period)
* [[Ragismic microtemperaments #Enneadecal|Hemienneadecal]], [[semihemienneadecal]] (1\38 period)
* [[Ragismic microtemperaments #Enneadecal|Hemienneadecal]], [[semihemienneadecal]] (1\38 period)
* [[Counterpyth family|Counterpyth temperaments]], [[niobium]] (1\41 period)
* [[Countercomp family|Countercomp temperaments]], [[niobium]] (1\41 period)
* [[Mitonismic temperaments #Meridic|Meridic]] (1\43 period)
* [[Mitonismic temperaments #Meridic|Meridic]] (1\43 period)
* [[Ragismic microtemperaments #Palladium|Palladium]] (1\46 period)
* [[Ragismic microtemperaments #Palladium|Palladium]] (1\46 period)
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* [[Parkleiness temperaments #Octogintic|Octogintic]] (1\80 period)
* [[Parkleiness temperaments #Octogintic|Octogintic]] (1\80 period)
* [[Stearnsmic clan #Garistearn|Garistearn]] (1\94 period)
* [[Stearnsmic clan #Garistearn|Garistearn]] (1\94 period)
* [[Tritrizo clan #Undecentic|Undecentic]] (1\99 period)
* [[Septiennealimmal clan #Undecentic|Undecentic]] (1\99 period)
* [[Frameshift clan#Auric|Auric]] (1\159 period)
* [[Septiennealimmal clan #Schisennealimmal|Schisennealimmal]] (1\171 period)
* [[Tritrizo clan #Schisennealimmal|Schisennealimmal]] (1\171 period)
* [[Septiennealimmal clan #Lunennealimmal|Lunennealimmal]] (1\441 period)
* [[Tritrizo clan #Lunennealimmal|Lunennealimmal]] (1\441 period)


== See also ==
== See also ==
* [[Map of rank-2 temperaments]]
* [[Map of rank-2 temperaments]]: Visual map of many of the temperaments listed here.


[[Category:Temperament collections]]
[[Category:Temperament collections]]
[[Category:Lists of temperaments]]
[[Category:Pages with mostly numerical content]]