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<h2>IMPORTED REVISION FROM WIKISPACES</h2>
{{Infobox ET}}
This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br>
{{ED intro}}
: This revision was by author [[User:genewardsmith|genewardsmith]] and made on <tt>2011-07-08 17:45:54 UTC</tt>.<br>
 
: The original revision id was <tt>240561563</tt>.<br>
== Theory ==
: The revision comment was: <tt></tt><br>
239edo excels as an [[11-limit]] system with a sharp tendency: [[prime harmonic]]s 3 through 11 are all tuned sharp. The accuracy of [[12/11]] is particularly notable, as 30\239 represents a [[convergent]] to this interval, which forms a barely [[consistent circle]], with the closing error being about 45% of a step.
The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.<br>
 
<h4>Original Wikitext content:</h4>
239 is a convergent to the [[argent tuning]], where the perfect fourth and fifth are in the logarithmic ratio of 1:√2, and with a fifth in this range, tempers out [[5120/5103]] with great accuracy. This implies that [[81/80]] and [[64/63]] are equated (to 5 steps), that three wholetones ([[9/8]]) stack to [[10/7]], and that the [[2187/2048|apotome]], the [[256/243|limma]], and the [[Pythagorean comma]] are equated with [[15/14]] (24 steps), [[21/20]] (17 steps), and [[50/49]] (7 steps) respectively.  
<div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;white-space: pre-wrap ! important" class="old-revision-html">The //239 equal division// divides the octave into 239 equal parts of 5.021 cents each. In the 7-limit, it tempers out 10976/10935, 5120/5103 and 2401/2400 and supports [[Breedsmic temperaments#Hemififths|hemififths temperament]], providing an excellent tuning. It also supports and provides a good tuning for [[Breedsmic temperaments#Quasiorwell|quasiorwell temperament]]. </pre></div>
 
<h4>Original HTML content:</h4>
Another notable feature of 239edo is that many of its [[5-limit]] intervals are mapped to composite numbers of steps: [[3/2]] to 140, [[4/3]] to 99, [[5/3]] to 176, [[5/4]] to 77, [[6/5]] to 63, and [[8/5]] to 162. Not only that, but plenty of these form relatively simple logarithmic ratios with each other, as described by [[Don Page comma]]s. In particular: [[gammic]], where 9 units form 6/5, 11 form 5/4, and 20 form 3/2; [[quartonic]], where 7 units form 6/5, 11 form 4/3, and 18 form 8/5; and [[escapade]], where 7 units form 5/4, 9 form 4/3, and 16 form 5/3, are all supported by 239edo with generators 7\239, 9\239, and 11\239 respectively. 239edo is describable as the unique intersection of any two of these.
<div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;width:200%;white-space: pre-wrap ! important" class="old-revision-html">&lt;html&gt;&lt;head&gt;&lt;title&gt;239edo&lt;/title&gt;&lt;/head&gt;&lt;body&gt;The &lt;em&gt;239 equal division&lt;/em&gt; divides the octave into 239 equal parts of 5.021 cents each. In the 7-limit, it tempers out 10976/10935, 5120/5103 and 2401/2400 and supports &lt;a class="wiki_link" href="/Breedsmic%20temperaments#Hemififths"&gt;hemififths temperament&lt;/a&gt;, providing an excellent tuning. It also supports and provides a good tuning for &lt;a class="wiki_link" href="/Breedsmic%20temperaments#Quasiorwell"&gt;quasiorwell temperament&lt;/a&gt;.&lt;/body&gt;&lt;/html&gt;</pre></div>
 
As a result, 239edo possesses many of the structures associated with temperaments such as [[tetracot]], [[porcupine]], [[bleu]], [[orwell]], and [[sensamagic]], but with interpretations of their generators that are generally much more precise than those temperaments provide (and are thus distinguished from the intervals that those temperaments' simplest generators are mapped to in 239edo). This proves advantageous in terms of adeptness at representing different "flavors" of categories of interval: for example, in the category of submajor or [[equable heptatonic]] seconds, 239edo distinguishes [[11/10]] (the "pine" generator, 1/3 of a perfect fourth) at 33\239, from [[32/29]] (the diminished third on the chain of fifths) at 34\239, from [[31/28]] (the "tetracot" generator, 1/4 of a perfect fifth) at 35\239, from [[10/9]] (the sesquiaugmented unison) at 36\239.
 
In addition to its 11-limit, 239edo also encompasses a large variety of higher primes, and is specifically commendable in the 2.3.5.7.11.17.29.31.37.43.53.59 subgroup. Primes 23, 67, and 71 are for the most part usable as well, though one should be cautious about pitting 23 against sharp odds (like 9 or 33).
 
The equal temperament [[tempering out|tempers out]] [[2401/2400]], [[5120/5103]], [[10976/10935]], and 29360128/29296875 in the 7-limit, [[support]]ing the [[hemififths]] temperament and providing an excellent tuning. It also supports and provides a good tuning for [[quasiorwell]], [[neptune]], and [[alphaquarter]]. In the 11-limit, it tempers out [[3025/3024]], [[4000/3993]], [[5632/5625]], [[12005/11979]], and [[41503/41472]], supporting [[quadrafifths]] and [[unthirds]].
 
=== Prime harmonics ===
{{Harmonics in equal|239}}
{{Harmonics in equal|239|start=12|columns=11|collapsed=true|title=Approximation of prime harmonics in 239edo (continued)}}
 
=== Subsets and supersets ===
239edo is the 52nd [[prime edo]].
 
== Intervals ==
{{Main|Table of 239edo intervals}}
 
== 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| 379 -239 }}
| {{Mapping| 239 379 }}
| −0.307
| 0.307
| 6.12
|-
| 2.3.5
| {{Monzo| 3 -18 11 }}, {{monzo| 32 -7 -9 }}
| {{Mapping| 239 379 555 }}
| −0.247
| 0.265
| 5.27
|-
| 2.3.5.7
| 2401/2400, 5120/5103, 29360128/29296875
| {{Mapping| 239 379 555 671 }}
| −0.204
| 0.241
| 4.80
|-
| 2.3.5.7.11
| 2401/2400, 3025/3024, 4000/3993, 5120/5103
| {{Mapping| 239 379 555 671 827 }}
| −0.220
| 0.218
| 4.34
|-
| 2.3.5.7.11.17
| 595/594, 1156/1155, 2058/2057, 2401/2400, 5120/5103
| {{Mapping| 239 379 555 671 827 977 }}
| −0.203
| 0.203
| 4.03
|- style="border-top: double;"
| 2.3.5.7.11.13
| 352/351, 625/624, 847/845, 1575/1573, 2401/2400
| {{Mapping| 239 379 555 671 827 885 }} (239f)
| −0.318
| 0.296
| 5.89
|-
| 2.3.5.7.11.13.17
| 352/351, 595/594, 625/624, 833/832, 1156/1155, 1575/1573
| {{Mapping| 239 379 555 671 827 885 977 }} (239f)
| −0.290
| 0.282
| 5.63
|}
 
=== 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*
! Temperaments
|-
| 1
| 3\239
| 15.06
| 121/120
| [[Yarman I]] (239)
|-
| 1
| 7\239
| 35.15
| 1990656/1953125
| [[Gammic]] (5-limit)
|-
| 1
| 9\239
| 45.19
| 250/243
| [[Quartonic]] (5-limit)
|-
| 1
| 11\239
| 55.23
| 33/32
| [[Escapade]] / [[alphaquarter]] (239f)
|-
| 1
| 35\239
| 175.73
| 72/65
| [[Quadrafifths]] (239f)
|-
| 1
| 54\239
| 271.13
| 90/77
| [[Quasiorwell]] (239)
|-
| 1
| 70\239
| 351.46
| 49/40
| [[Hemififths]] (7-limit)
|-
| 1
| 79\239
| 396.65
| 44/35
| [[Squarschmidt]]
|-
| 1
| 83\239
| 416.74
| 14/11
| [[Unthirds]] (239f)
|-
| 1
| 103\239
| 517.15
| 66/49
| [[Cutefourths]] (239f)
|-
| 1
| 116\239
| 582.43
| 7/5
| [[Neptune]] (7-limit)
|}
<nowiki/>* [[Normal forms #Equave-reduced-generator form|Octave-reduced form]], reduced to the first half-octave, and [[normal forms #Minimal-generator form|minimal form]] in parentheses if distinct
 
== Music ==
; [[Francium]]
* "thatyounglighthouseboi" from ''albumwithoutspaces'' (2024) – [https://open.spotify.com/track/2dGpklZpWAYSRDHtjc3nDs Spotify] | [https://francium223.bandcamp.com/track/thatyounglighthouseboi Bandcamp] | [https://www.youtube.com/watch?v=nAdJncpsOlk YouTube]
* "Bath And A Nice Dream" from ''You Are A...'' (2024) – [https://open.spotify.com/track/3RJ77kQEsnkjfgjjUFk9DH Spotify] | [https://francium223.bandcamp.com/track/bath-and-a-nice-dream Bandcamp] | [https://www.youtube.com/watch?v=3eBYJM6cRPA YouTube]
* "You Like Frozen Pizza?" from ''Questions, Vol. 2'' (2025) – [https://open.spotify.com/track/09AhftssrVDgwms287FA53 Spotify] | [https://francium223.bandcamp.com/track/you-like-frozen-pizza Bandcamp] | [https://www.youtube.com/watch?v=AVFLQJBLpms YouTube]
 
[[Category:Alphaquarter]]
[[Category:Hemififths]]
[[Category:Listen]]
[[Category:Quasiorwell]]
Retrieved from "https://en.xen.wiki/w/239edo"