343edo: Difference between revisions
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{{Infobox ET}} | {{Infobox ET}} | ||
{{ | {{ED intro}} | ||
== Theory == | == Theory == | ||
343edo is only [[consistent]] to the [[3-odd-limit]] since its errors of [[harmonic]]s [[3/1|3]] and [[5/1|5]] are quite large. To start with, consider the 2.9.15.7 [[subgroup]], where it [[tempering out|tempers out]] 5250987/5242880. In the 2.5.7 subgroup it tempers out 2100875/2097152 and in the 2.3.7 subgroup it tempers out 118098/117649. | 343edo is only [[consistent]] to the [[3-odd-limit]] since its errors of [[harmonic]]s [[3/1|3]] and [[5/1|5]] are quite large. To start with, consider the 2.9.15.7 [[subgroup]], where it [[tempering out|tempers out]] 5250987/5242880. In the 2.5.7 subgroup it tempers out 2100875/2097152 and in the 2.3.7 subgroup it tempers out 118098/117649. | ||
For the full 7-limit, the 343c [[val]] tempers out [[4375/4374]] and [[5120/5103]], [[support]]ing [[amity]]. The 343cdd val tempers out [[16875/16807]] and 65536/64827. The [[patent val]] tempers out [[10976/10935]] and 390625/387072. | For the full 7-limit, the 343c [[val]] tempers out [[4375/4374]] and [[5120/5103]], [[support]]ing [[amity]] (gen. 97\343, per. 343\343). The 343cdd val tempers out [[16875/16807]] and 65536/64827. The [[patent val]] tempers out [[10976/10935]] and 390625/387072. | ||
=== Odd harmonics === | === Odd harmonics === | ||
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=== Subsets and supersets === | === Subsets and supersets === | ||
Since 343 factors into 7<sup>3</sup>, 343edo has [[7edo]] and [[49edo]] as its subsets. [[686edo]], which doubles it, gives a good correction to the harmonics 3 and 5. | Since 343 factors into 7<sup>3</sup>, 343edo has [[7edo]] and [[49edo]] as its subsets. [[686edo]], which doubles it, gives a good correction to the harmonics 3 and 5. | ||
== Use as a NEJI == | |||
Of all n-[[afdo]]s where n is between 343 and 800, and where n is a multiple of a simple prime by any number of 2s, or a simple semiprime by any number of 2s, [[476afdo]] (''7x17x2x2'') approximates 343edo with the least [[relative error]]. (''See [[User:BudjarnLambeth/Approximating 343edo in afdos|Approximating 343edo in afdos]].)'' | |||
343edo could be approximated into 476afdo as a [[neji]] scale. Doing so would make it an over-17-by-7 scale (when viewed through a [[primodal]] lens). (''[[User:BudjarnLambeth/Approximating 343edo in afdos#Scala file|Scala file]].)'' | |||
It would make sense to use smaller over-17, over-7, or over-17-by-7 JI scales as subsets of this neji. | |||
== Regular temperament properties == | == Regular temperament properties == | ||
343edo is on the [[optimal ET sequence]] of [[gammy]] temperament (343be, 10\343 generator, 2/1 period), [[protolangwidge]] temperament (343, 200\343 g, 2/1 p) and [[anthoine]] temperament (343dd, 110\343 g, 2/1 p). | |||
343edo might potentially be useful for [[49th-octave temperaments]] ''(see [[Fractional-octave temperaments]])'', this is something which hasn't been explored yet. | |||
{| class="wikitable center-4 center-5 center-6" | {| class="wikitable center-4 center-5 center-6" | ||
|- | |||
! rowspan="2" | [[Subgroup]] | ! rowspan="2" | [[Subgroup]] | ||
! rowspan="2" | [[Comma list | ! rowspan="2" | [[Comma list]] | ||
! rowspan="2" | [[Mapping]] | ! rowspan="2" | [[Mapping]] | ||
! rowspan="2" | Optimal<br>8ve | ! rowspan="2" | Optimal<br />8ve stretch (¢) | ||
! colspan="2" | Tuning | ! colspan="2" | Tuning error | ||
|- | |- | ||
! [[TE error|Absolute]] (¢) | ! [[TE error|Absolute]] (¢) | ||
! [[TE simple badness|Relative]] (%) | ! [[TE simple badness|Relative]] (%) | ||
| Line 27: | Line 39: | ||
| {{monzo| -1087 343 }} | | {{monzo| -1087 343 }} | ||
| {{mapping| 343 1087 }} | | {{mapping| 343 1087 }} | ||
| 0.1569 | | +0.1569 | ||
| 0.1569 | | 0.1569 | ||
| 4.48 | | 4.48 | ||
| Line 34: | Line 46: | ||
| {{monzo| -27 -1 13 }}, {{monzo| 40 -28 21 }} | | {{monzo| -27 -1 13 }}, {{monzo| 40 -28 21 }} | ||
| {{mapping| 343 1087 796 }} | | {{mapping| 343 1087 796 }} | ||
| 0.3162 | | +0.3162 | ||
| 0.2592 | | 0.2592 | ||
| 7.41 | | 7.41 | ||
| Line 41: | Line 53: | ||
| 118098/117649, 7381125/7340032, 9765625/9680832 | | 118098/117649, 7381125/7340032, 9765625/9680832 | ||
| {{mapping| 343 1087 796 963 }} | | {{mapping| 343 1087 796 963 }} | ||
| 0.2130 | | +0.2130 | ||
| 0.2869 | | 0.2869 | ||
| 8.20 | | 8.20 | ||
|} | |} | ||
== Octave stretch or compression == | |||
If one is using 343edo, it's probably either for a specific temperament, or because of its good [[prime]]s 2, 7, 17 and 19, which will inform how one might want to [[octave stretch]] or compress it. | |||
; Using for a temperament | |||
[[TE]] octave stretch: | |||
* For 13-limit gammy | |||
** Octave size: 1200.437{{c}} | |||
* For 7-limit anthoine | |||
** Octave size: 1199.630{{c}} | |||
; Using for primes 2, 7, 17, 19 | |||
If one is using 343 for its accurate 2.7.17.19 intervals, one will probably not want to use 343edo with [[wart]]s a, d, g or h. | |||
That leaves the following [[TE]] tunings for the [[19-limit]]: | |||
* 343cf | |||
** Octave size: 1199.643{{c}} | |||
** TE error: 0.363{{c}}/octave | |||
* 343c | |||
** Octave size: 1199.761{{c}} | |||
** TE error: 0.382{{c}}/octave | |||
* 343 (patent val) | |||
** Octave size: 1199.950{{c}} | |||
** TE error: 0.395{{c}}/octave | |||
* 343e | |||
** Octave size: 1200.076{{c}} | |||
** TE error: 0.418{{c}}/octave | |||
* 343f | |||
** Octave size: 1199.831{{c}} | |||
** TE error: 0.431{{c}}/octave | |||
* 343ce | |||
** Octave size: 1199.888{{c}} | |||
** TE error: 0.461{{c}}/octave | |||
{{Harmonics in cet|3.498|intervals=odd|title=Odd harmonics in TE-tuned 343cf}} | |||
== Scales == | |||
343edo includes every 49edo scale (see [[49edo#Scales]]). | |||
==== Lucite[23] ==== | |||
'''Lucite[23]''' is a 23-tone [[MOS scale]] discovered by [[Gordon Wery]] in October 2025: | |||
* 13 17 13 17 13 17 13 17 13 17 13 17 13 17 13 17 13 17 13 17 13 17 13 | |||
; Properties | |||
It is very similar to [[23edo]] and can be used as a [[well temperament]] of 23edo. | |||
In his post on Discord describing it, Wery said of the scale: | |||
"''Basically a more complicated version of 23edo, centered around a more minor (less neutral) anti-diatonic scale.'' | |||
''This scale has a sort of glassy quality, ample neutral seconds, and two sets of dual fifths--a true dual dual fifth scale.''" | |||
It is [[generator|generated]] by 30\343 (104.956{{c}}). | |||
Lucite[23] can be generalised into a 17-limit [[regular temperament]] called '''[[User:BudjarnLambeth/Regular temperament interpretation of lucite23|lucite temperament]]'''. | |||
; Naming | |||
Lucite is another name for acrylic glass. | |||
Wery named the temperament "lucite" because musically, it sounds like frosted glass (perhaps to do with the timbre/partials of struck glass). | |||
Some coincidences that make the name "lucite" particularly fitting | |||
* Lucite is often installed in double layers in building, and lucite temperament has two sizes of perfect fifth-like interval. | |||
* Lucite[23] is close to ripple[23], but turned inside out; and lucite is reflective and clear like water, but solid instead of liquid | |||
* Lucite is an especially lightweight material, and lucite temperament is lightweight in the way it only needs 18 generators to reach every 17-limit prime. | |||
; Subsets | |||
* [[Modmos]] of lucite[6]: 60 60 30 40 93 60 | |||
=== Other MOS scales === | |||
* Amity[7]: 52 52 45 52 45 52 45 | |||
* Amity[11]: 45 7 45 45 7 45 7 45 45 7 42 | |||
* Amity[18]: 7 38 7 38 7 7 38 7 7 38 7 38 7 7 38 7 38 7 | |||
* Amity[25]: 7 31 7 7 7 31 7 7 31 7 7 7 31 7 7 7 31 7 7 31 7 7 7 31 7 | |||
* Amity[32]: 7 7 24 7 7 7 24 7 7 7 7 24 7 7 7 24 7 7 7 7 24 7 7 7 24 7 7 7 7 24 7 7 | |||
* Amity[39]: 7 7 17 7 7 7 7 7 17 7 7 7 7 17 7 7 7 7 7 17 7 7 7 7 7 17 7 7 7 7 17 7 7 7 7 7 17 7 7 | |||
* Amity[53]: 7 7 7 3 7 7 7 7 7 7 7 3 7 7 7 7 7 7 3 7 7 7 7 7 7 7 3 7 7 7 7 7 7 7 3 7 7 7 7 7 7 3 7 7 7 7 7 7 7 3 7 7 7 | |||
** ''Try approximating scales fron 53edo ([[53edo#Scales]]) within the amity[53] scale'' | |||
* Amity[99]: 3 4 3 4 3 4 3 4 3 4 3 4 3 4 3 3 4 3 4 3 4 3 4 3 4 3 4 3 3 4 3 4 3 4 3 4 3 4 3 4 3 4 3 3 4 3 4 3 4 3 4 3 4 3 4 3 3 4 3 4 3 4 3 4 3 4 3 4 3 4 3 3 4 3 4 3 4 3 4 3 4 3 4 3 3 4 3 4 3 4 3 4 3 4 3 4 3 4 3 | |||
** ''Try approximating scales fron 99edo ([[99edo#Scales]]) within the amity[99] scale'' | |||
* Lucite[23]: 13 17 13 17 13 17 13 17 13 17 13 17 13 17 13 17 13 17 13 17 13 17 13 | |||
** ''Try approximating scales fron 23edo ([[23edo#Scales]]) within the lucite[23] scale'' | |||
* Lucite[34]: 13 4 13 13 4 13 13 4 13 13 4 13 13 13 4 13 13 4 13 13 4 13 13 4 13 13 4 13 13 4 13 13 4 13 | |||
** ''Try approximating scales fron 34edo ([[34edo#Scales]]) within the lucite[34] scale'' | |||
=== 343ed16 === | |||
'''343ed16''' is contained within 343edo (it is every 4th step of 343edo). It is like [[86edo]] with the [[octave stretching|octave stretched]] by 3.5 [[cents]]. | |||
It is quite similar to [[136edt]]. | |||
Compared to 86edo it improves harmonics 3, 5, 7 and 11. Its mappings of multiple-of-2 harmonics are very inconsistent, though some composers may enjoy this due to the potential to play tricks on the listener by having [[octave equivalence]] fall on a scale step one might not expect. | |||
Many temperaments and scales from 86edo can be used here in 343ed16 too. | |||
{{Harmonics in equal|343|16|1|intervals=integer|columns=12}} | |||
{{Harmonics in equal|86|2|1|intervals=integer|columns=12|collapsed=1|title=86edo for comparison}} | |||
=== 34.3edo === | |||
'''34.3edo''' is contained within 343edo (it is every 10th step of 343edo). It is like [[34edo]] with the [[octave shrinking|octave compressed]] by 11.51 [[cents]]. | |||
It has a step size of 34.985{{c}}. | |||
It was discovered by chaseofspades513 and [[YoVariable]] on the [[Xenharmonic Alliance]] Discord server and further described by [[Gordon Wery]]. | |||
Compared to 34edo it improves harmonics 7, 11 and 13, at the expense of 2, 3 and 5. Its mappings of multiple-of-2 and multiple-of-3 harmonics are very inconsistent, though some composers may enjoy this due to the potential to play tricks on the listener by having [[octave equivalence]] fall on a scale step one might not expect. | |||
Many temperaments and [[34edo#Scales|scales from 34edo]] can be used here in 34.3edo too. | |||
{{Harmonics in cet|34.985|intervals=integer|columns=12|title=Approximation of harmonics in 34.3edo}} | |||
{{Harmonics in equal|34|2|1|intervals=integer|columns=12|collapsed=1|title=34edo for comparison}} | |||
=== Scales approximated from JI === | |||
* [[4 of 7-17-19-21-51 pentany]]: 96 50 55 96 46 (sounds like minor pentatonic) | |||
* [[4 of 7-17-19-21-51 by 3/2 tetrapentany]]: 3 9 46 4 34 21 29 8 47 3 9 46 38 46 | |||
* [[7-17-19-21 hexany]]: 50 46 50 55 87 55 (sounds like minor hexatonic) | |||
* [[7-17-19-21 by 3/2 trihexany]]: 3 47 8 38 12 38 8 47 3 46 9 29 9 46 | |||
* [[9afdo]]: 40 37 34 32 30 28 52 47 43 | |||
* [[18afdo]]: 21 19 19 18 17 17 16 16 15 15 14 14 27 25 24 23 22 21 | |||
* [[36afdo]]: 11 10 9 10 9 10 9 9 8 9 8 9 8 8 8 8 7 8 7 8 7 7 7 7 14 13 13 12 12 12 12 11 11 11 11 10 | |||
* [[72afdo]]: 5 6 5 5 4 5 5 5 5 4 5 5 4 5 4 5 4 4 5 4 4 4 5 4 4 4 4 4 4 4 4 4 4 3 4 4 4 3 4 4 3 4 4 3 4 3 4 3 7 7 6 7 6 7 6 6 6 6 6 6 6 6 6 5 6 5 6 5 6 5 5 5 | |||
=== Other scales === | |||
* [[Equiheptatonic]] (as from [[7edo]]): 49 49 49 49 49 49 49 | |||
* [[49edo]]: 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 | |||
== Music == | |||
; [[Budjarn Lambeth]] | |||
* [https://youtu.be/aWqdWHSk5J4 ''Odd Findings in the Caves''] (2025) - ''uses two copies of lucite[23]'' | |||