2118edo: Difference between revisions

Eliora (talk | contribs)
Theory: comma basis
ArrowHead294 (talk | contribs)
mNo edit summary
 
(5 intermediate revisions by 4 users not shown)
Line 1: Line 1:
{{Infobox ET
{{Infobox ET}}
|Prime factorization = 2 × 3 × 353
{{ED intro}}
|Fifth = 1239\2118 (→[[706edo|413/706]])
|Major 2nd = 360\2118
|Semitones = 201:159
|Consistency=11}}
{{EDO intro|2118}}


== Theory ==
== Theory ==
Primes approximated with less than 1 standard deviation in 2118edo are: 2, 3, 5, 7, 11, 19, 23, 29, 31, 43. Overall, it offers excellent double-13's 31-limit harmony, as both mappings of 13 (2118 and 2118f vals) have useful interpretations.
2118edo provides a 43-limit approximation of [[secor]] with [[46/43]] (206 steps), however this reduces to 103\1059, meaning that it is a compound of two circles of such secor. In addition, it offers a 205-step generator "meantone secor" which is described by a {{nowrap|31 & 2118}} temperament, also in the 2.3.5.7.11.23.43 subgroup, and also offers a meantone fifth. The comma basis for the "meantone secor" temperament is 5376/5375, 9317/9315, 25921/25920, 151263/151250, and 10551296/10546875.
=== Prime harmonics ===
{{Harmonics in equal|2118}}
{{Harmonics in equal|2118}}
Primes with less than 1 standard deviation in 2118edo are: 2, 3, 5, 7, 11, 19, 23, 29, 31, 43. Overall, it offers excellent double-13s 31-limit harmony, as both mappings of 13 (2118 and 2118f vals) have useful interpretations.


2118edo provides a 43-limit approximation of [[secor]] with [[46/43]] (206 steps), however this reduces to 103\1059, meaning that it is a compound of two circles of such secor. In addition, it offers a 205-step generator "meantone secor" which is described by a 31 & 2118 temperament, also in the 2.3.5.7.11.23.43 subgroup, and also offers a meantone fifth. The comma basis for the "meantone secor" temperament is 5376/5375, 9317/9315, 25921/25920, 151263/151250, and 10551296/10546875.
=== Subsets and supersets ===
 
2118edo is 6 times the [[353edo]], meaning it can be used to play a compound of 6 chains of the [[Hemimean clan #Rectified hebrew|rectified hebrew]] temperament.
2118edo is 6 times the [[353edo]], meaning it can be used to play a compound of 6 chains of the [[Hemimean clan#Rectified Hebrew|Rectified Hebrew]] temperament.


== Regular temperament properties ==
== Regular temperament properties ==
{| class="wikitable center-4 center-5 center-6"
{| class="wikitable center-4 center-5 center-6"
! rowspan="2" |Subgroup
! rowspan="2" |[[Comma list]]
! rowspan="2" |[[Mapping]]
! rowspan="2" |Optimal
8ve stretch (¢)
! colspan="2" |Tuning error
|-
|-
![[TE error|Absolute]] (¢)
! rowspan="2" | [[Subgroup]]
![[TE simple badness|Relative]] (%)
! rowspan="2" | [[Comma list|Comma List]]
! rowspan="2" | [[Mapping]]
! rowspan="2" | Optimal<br>8ve Stretch (¢)
! colspan="2" | Tuning Error
|-
|-
|2.3.5
! [[TE error|Absolute]] (¢)
|{{monzo|38 -2 15}}, {{monzo| -11 130 -84}}
! [[TE simple badness|Relative]] (%)
|[{{val|2118 3357 4918}}]
|-
| -0.0186
| 2.3.5
|0.0156
| {{monzo| 38 -2 15 }}, {{monzo| -11 130 -84 }}
| {{mapping| 2118 3357 4918 }}
| −0.0186
| 0.0156
|
|
|-
|-
|2.3.5.7
| 2.3.5.7
|250047/250000,{{monzo|-1 -18 -3 13}}, {{monzo|38 -2 -15 0}}
| 250047/250000, {{monzo| -1 -18 -3 13 }}, {{monzo| 38 -2 -15 }}
|[{{val|2118 3357 4918 5946}}]
| {{mapping| 2118 3357 4918 5946 }}
| -0.0150
| −0.0150
|0.0148
| 0.0148
|
|
|-
|-
|2.3.5.7.11
| 2.3.5.7.11
|9801/9800, 250047/250000, {{monzo|25 1 -4 0 -5}}, {{monzo|16 -7 -9 2 3}}
| 9801/9800, 250047/250000, {{monzo| 25 1 -4 0 -5 }}, {{monzo| 16 -7 -9 2 3 }}
|[{{val|2118 3357 4918 5946 7927}}]
| {{mapping| 2118 3357 4918 5946 7927 }}
|<nowiki>-0.0096</nowiki>
| −0.0096
|0.0172
| 0.0172
|
|
|}
|}
[[Category:Equal divisions of the octave|####]] <!-- 4-digit number -->