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{{Infobox ET}}
{{Infobox ET}}
{{EDO intro|61}}
{{ED intro}}


== Theory ==
== Theory ==
As an equal temperament, 61et is characterized by [[tempering out]] 20000/19683 ([[tetracot comma]]) and 262144/253125 ([[passion comma]]) in the 5-limit. In the 7-limit, the [[patent val]] {{val| 61 97 142 '''171''' }} [[support]]s [[valentine]] (15 & 46), and is the [[optimal patent val]] for [[freivald]] (24 & 37) in the 7-, 11- and 13-limit. The 61d [[val]] {{val| 61 97 142 '''172''' }} is a great tuning for [[modus]] and [[quasisuper]], and is a simple but out-of-tune edo tuning for [[parakleismic]]. [[Peter Kosmorsky]] has an interesting poem about its tuning profile, as follows.  
61edo is only [[consistent]] to the [[5-odd-limit]]. Its [[3/1|3rd]] and [[5/1|5th]] [[harmonic]]s are sharp of just by more than 6 cents, and the [[7/1|7th]] and [[11/1|11th]], though they err by less, are on the flat side. This limits its harmonic inventory. However, it does possess reasonably good approximations of [[21/16]] and [[23/16]], only a bit more than one cent off in each case.  


=== Introductory poem ===
As an equal temperament, 61et is characterized by [[tempering out]] 20000/19683 ([[tetracot comma]]) and 262144/253125 ([[passion comma]]) in the 5-limit. In the 7-limit, the [[patent val]] {{val| 61 97 142 '''171''' }} [[support]]s [[valentine]] ({{nowrap| 15 & 46 }}), and is the [[optimal patent val]] for [[freivald]] ({{nowrap| 24 & 37 }}) in the 7-, 11- and 13-limit. The 61d [[val]] {{val| 61 97 142 '''172''' }} is a great tuning for [[modus]] and [[quasisuper]], and is a simple but out-of-tune edo tuning for [[parakleismic]].
These 61 equal divisions of the octave,
 
though rare are assuredly a ROCK-tave (har har),
 
while the 3rd and 5th harmonics are about six cents sharp,
 
(and the flattish 15th poised differently on the harp),
 
the 7th and 11th err by less, around three,
 
and thus mayhap, a good orgone tuning found to be;
 
slightly sharp as well, is the 13th harmonic's place,
 
but the 9th and 17th lack near so much grace,
 
interestingly the 19th is good but a couple cents flat,
 
and the 21st and 23rd are but a cent or two sharp!


=== Odd harmonics ===
=== Odd harmonics ===
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== Notation ==
== Notation ==
=== Ups and downs notation ===
61edo can be notated using [[ups and downs notation]] using [[Helmholtz–Ellis]] accidentals:


===Sagittal notation===
{{Sharpness-sharp8}}
In the following diagrams, a sagittal symbol followed by an equals sign (=) means that the following comma is the symbol's [[Sagittal notation#Primary comma|primary comma]] (the comma it ''exactly'' represents in JI), while an approximately equals sign (≈) means it is a secondary comma (a comma it ''approximately'' represents in JI). In both cases the symbol exactly represents the tempered version of the comma in this EDO.


This notation uses the same sagittal sequence as [[54edo#Sagittal notation|54-EDO]].
=== Sagittal notation ===
====Evo flavor====
This notation uses the same sagittal sequence as [[54edo #Sagittal notation|54edo]].


==== Evo flavor ====
<imagemap>
<imagemap>
File:61-EDO_Evo_Sagittal.svg
File:61-EDO_Evo_Sagittal.svg
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</imagemap>
</imagemap>


====Revo flavor====
==== Revo flavor ====
 
<imagemap>
<imagemap>
File:61-EDO_Revo_Sagittal.svg
File:61-EDO_Revo_Sagittal.svg
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</imagemap>
</imagemap>


====Evo-SZ flavor====
==== Evo-SZ flavor ====
 
<imagemap>
<imagemap>
File:61-EDO_Evo-SZ_Sagittal.svg
File:61-EDO_Evo-SZ_Sagittal.svg
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</imagemap>
</imagemap>


[[Category:Todo:add rank 2 temperaments table]]
In the diagrams above, a sagittal symbol followed by an equals sign (=) means that the following comma is the symbol's [[Sagittal notation#Primary comma|primary comma]] (the comma it ''exactly'' represents in JI), while an approximately equals sign (≈) means it is a secondary comma (a comma it ''approximately'' represents in JI). In both cases the symbol exactly represents the tempered version of the comma in this edo.
 
== Regular temperament properties ==
{| class="wikitable center-4 center-5 center-6"
|-
! rowspan="2" |[[Subgroup]]
! rowspan="2" |[[Comma list]]
! rowspan="2" |[[Mapping]]
! rowspan="2" | Optimal<br>8ve stretch (¢)
! colspan="2" | Tuning error
|-
![[TE error|Absolute]] (¢)
![[TE simple badness|Relative]] (%)
|-
| 2.3
|{{Monzo| 97 -61 }}
|{{Mapping| 61 97 }}
| −1.97
| 1.97
| 10.0
|-
| 2.3.5
| 20000/19683, 262144/253125
|{{Mapping| 61 97 142 }}
| −2.33
| 1.69
| 8.59
|- style="border-top: double;"
| 2.3.5.7
| 64/63, 2430/2401, 3125/3087
|{{mapping| 61 97 142 172 }} (61d)
| −3.06
| 1.93
| 9.84
|- style="border-top: double;"
| 2.3.5.7
| 126/125, 1029/1024, 2240/2187
|{{Mapping| 61 97 142 171 }} (61)
| −1.32
| 2.29
| 11.7
|}
 
=== Rank-2 temperaments ===
{| class="wikitable center-all left-5"
|+ style="font-size: 105%;" |Table of rank-2 temperaments by generator
|-
! Periods<br>per 8ve
! Generator*
! Cents*
! Associated<br>ratio*
! Temperament
|-
| 1
| 2\61
| 39.3
| 40/39
|[[Hemivalentine]] (61)
|-
| 1
| 3\61
| 59.0
| 28/27
|[[Dodecacot]] (61de…)
|-
| 1
| 4\61
| 78.7
| 22/21
|[[Valentine]] (61)
|-
| 1
| 5\61
| 98.4
| 16/15
|[[Passion]] (61de…) / [[passionate]] (61)
|-
| 1
| 7\61
| 137.7
| 13/12
|[[Quartemka]] (61)
|-
| 1
| 9\61
| 177.0
| 10/9
|[[Modus]] (61de) / [[wollemia]] (61e)
|-
| 1
| 11\61
| 236.1
| 8/7
|[[Slendric]] (61)
|-
| 1
| 16\61
| 314.8
| 6/5
|[[Parakleismic]] (61d)
|-
| 1
| 23\61
| 452.5
| 13/10
|[[Maja]] (61d)
|-
| 1
| 25\61
| 491.8
| 4/3
|[[Quasisuper]] (61d)
|-
| 1
| 28\61
| 550.8
| 11/8
|[[Freivald]] (61)
|}
<nowiki/>* [[Normal lists|Octave-reduced form]], reduced to the first half-octave
 
== Instruments ==
A [[Lumatone mapping for 61edo]] has now been demonstrated (see the Valentine mapping for full gamut coverage).
 
== See also ==
 
=== Introductory poem ===
[[Peter Kosmorsky]] wrote a poem on 61edo; see [[User:Spt3125/61edo poem|the 61edo poem]].
 
== Music ==
; [[Bryan Deister]]
* [https://www.youtube.com/shorts/1Ai__APev5M ''microtonal improvisation in 61edo''] (2025)
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