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#redirect [[/7L_2s_(5/2-equivalent)/]]
This page is about a [[MOS scale]] with a period of a major tenth and 7 large steps and 2 small steps arranged LLLsLLLLs (or any rotation of that, such as LLsLLLsLL).
 
==Name==
The author suggests the name '''Terra Rubra''' for this scale.
 
==Temperaments==
 
=== Terra Rubra-Meantone ===
[[Subgroup]]: 5/2.2.3
 
[[Comma]] list: [[81/80]]
 
[[POL2]] generator: ~3/2 = 696.8737¢
 
[[Mapping]]: [⟨1 1 1], ⟨0 -2 -1]]
 
[[Optimal ET sequence]]: [[9ed5/2]], [[16ed5/2]], [[25ed5/2]]
 
=== Terra Rubra-Superpyth ===
[[Subgroup]]: 18/7.2.3
 
[[Comma]] list: [[64/63]]
 
[[POL2]] generator: ~3/2 = 708.4011¢
 
[[Mapping]]: [⟨1 1 1], ⟨0 -2 -1]]
 
[[Optimal ET sequence]]: [[7ed18/7]], [[16ed18/7]], [[23ed18/7]], [[30ed18/7]]
 
==Scale tree==
{| class="wikitable"
|-
!Generator
! |Generator size
!L
!s
!Comments
|-
| |4\[[7ed5/2|7]]
| |<u>960.000</u>
|1
|0
|
|-
|25\44
|<u>937.500</u>
|6
|1
|
|-
|71\129
|<u>936.263</u>
|17
|3
|
|-
|46\81
|<u>935.593</u>
|11
|2
|
|-
|67\118
|<u>934.884</u>
|16
|3
|
|-
| |21\37
| |<u>933.333</u>
|5
|1
| |
|-
|80\141
|<u>932.039</u>
|19
|4
|
|-
|59\104
|<u>931.579</u>
|14
|3
|
|-
|38\67
|<u>930.612</u>
|9
|2
|
|-
|55\97
|<u>929.577</u>
|13
|3
|
|-
|72\127
|<u>929.032</u>
|17
|4
|
|-
|89\157
|<u>928.696</u>
|21
|5
|
|-
| |17\30
| |<u>927.273</u>
|4
|1
| |
|-
|115\203
|<u>926.174</u>
|27
|7
|
|-
|98\173
|<u>925.984</u>
|23
|6
|
|-
|81\143
|<u>925.714</u>
|19
|5
|
|-
|64\113
|<u>925.301</u>
|15
|4
|
|-
|47\83
|<u>924.590</u>
|11
|3
|
|-
| |30\53
| |<u>923.077</u>
|7
|2
| |
|-
|73\129
|<u>922.105</u>
|17
|5
|
|-
| |43\76
| |<u>921.429</u>
|10
|3
| |
|-
| |56\99
| |<u>920.548</u>
|13
|4
| |
|-
| |69\122
| |<u>920.000</u>
|16
|5
| |
|-
| |82\145
| |<u>919.626</u>
|19
|6
| |
|-
| |95\168
| |<u>919.355</u>
|22
|7
| |
|-
| |
| |<u>919.340</u>
|π
|1
| |
|-
| |108\191
| |<u>919.149</u>
|25
|8
| |
|-
| |121\214
| |<u>918.987</u>
|28
|9
| |
|-
| |13\23
| |<u>917.647</u>
|3
|1
| |
|-
| |100\177
| |<u>916.031</u>
|23
|8
| |
|-
| |87\154
| |<u>915.789</u>
|20
|7
| |
|-
| |74\131
| |<u>915.464</u>
|17
|6
| |
|-
| |61\108
| |<u>915.000</u>
|14
|5
| |
|-
| |48\85
| |<u>914.286</u>
|11
|4
| |
|-
| |
| |<u>913.821</u>
|e
|1
| |L/s = e
|-
| |35\62
| |<u>913.043</u>
|8
|3
| |
|-
| |
| |<u>912.287</u>
|<span style="background-color: #ffffff; color: #222222; font-family: arial,sans-serif; font-size: small;">φ</span>+1
|1
| |Split <span style="background-color: #ffffff; color: #222222; font-family: arial,sans-serif; font-size: small;">φ</span> superdiatonic relation
|-
| |57\101
| |<u>912.000</u>
|13
|5
| |
|-
|79\140
|<u>911.538</u>
|18
|7
|
|-
| |22\39
| |<u>910.345</u>
|5
|2
| |
|-
| |75\133
| |<u>909.091</u>
|17
|7
| |
|-
| |53\94
| |<u>908.571</u>
|12
|5
| |
|-
| |31\55
| |<u>907.317</u>
|7
|3
| |
|-
|71\126
|<u>906.383</u>
|16
|7
|
|-
| |40\71
| |<u>905.660</u>
|9
|4
| |
|-
| |…
| |…
|…
|…
| |
|-
|229\305
|<u>900.983</u>
|51
|25
|
|-
| |9\16
| |<u>900.000</u>
|2
|1
| |<span style="display: block; text-align: left;">'''[BOUNDARY OF PROPRIETY: smaller generators are strictly proper]'''</span>
|-
|230\397
|<u>899.023</u>
|51
|26
|
|-
|…
|…
|…
|…
|
|-
| |41\73
| |<u>894.545</u>
|9
|5
| |
|-
| |32\57
| |<u>893.023</u>
|7
|4
| |<span style="font-size: 12.8000001907349px;"><big>the 'Commatic' version of Terra Rubra, because its high accuracy of the 16/15 interval, the note '2b'</big></span>
|-
| |
| |<u>892.459</u>
|
|
| |
|-
|87\155
|<u>892.307</u>
|19
|11
|
|-
| |55\98
| |<u>891.892</u>
|12
|7
| |
|-
| |23\41
| |<u>890.323</u>
|5
|3
| |Golden Terra Rubra 1/5-tone
|-
|83\148
|<u>889.286</u>
|18
|11
|
|-
| |60\107
| |<u>888.889</u>
|13
|8
| |Golden Terra Rubra 1/13-tone
|-
| |
| |<u>888.643</u>
|<span style="background-color: #ffffff; color: #222222; font-family: arial,sans-serif; font-size: small;">φ</span>
|1
| |GOLDEN Terra Rubra (L/s = <span style="background-color: #ffffff; color: #222222; font-family: arial,sans-serif; font-size: small;">φ)</span>
|-
| |37\66
| |<u>888.000</u>
|8
|5
| |Golden Terra Rubra 1/8-tone
|-
|88\157
|<u>887.395</u>
|19
|12
|
|-
| |51\91
| |<u>886.957</u>
|11
|7
| |
|-
| |65\116
| |<u>886.364</u>
|14
|9
| |
|-
| |79\141
| |<u>885.981</u>
|17
|11
| |
|-
| |93\166
| |<u>885.714</u>
|20
|13
| |
|-
| |14\25
| |<u>884.211</u>
|3
|2
| |Golden Terra Rubra 1/3-tone
|-
| |117\209
| |<u>883.019</u>
|25
|17
| |
|-
| |103\184
| |<u>882.857</u>
|22
|15
| |
|-
| |89\159
| |<u>882.645</u>
|19
|13
| |
|-
| |75\134
| |<u>882.353</u>
|16
|11
| |
|-
| |61\109
| |<u>881.928</u>
|13
|9
| |
|-
| |47\84
| |<u>881.250</u>
|10
|7
| |
|-
| |33\59
| |<u>880.000</u>
|7
|5
| |
|-
|85\152
|<u>879.310</u>
|18
|13
|
|-
|52\93
|<u>878.873</u>
|11
|8
|
|-
|71\127
|<u>878.351</u>
|15
|11
|
|-
|90\161
|<u>878.049</u>
|19
|14
|
|-
|109\195
|<u>877.852</u>
|23
|17
|
|-
| |19\34
| |<u>876.923</u>
|4
|3
| |
|-
|62\111
|<u>875.294</u>
|13
|10
|
|-
|43\77
|<u>874.576</u>
|9
|7
|
|-
|67\120
|<u>873.913</u>
|14
|11
|
|-
|24\43
|<u>872.727</u>
|5
|4
|
|-
|53\95
|<u>871.233</u>
|11
|9
|
|-
|29\52
|<u>870.000</u>
|6
|5
|
|-
| |5\[[9edo|9]]
| |<u>857.142</u>
|1
|0
| |
|}
 
== See also ==
[[7L 2s (5/2-equivalent)]] - idealized meantone tuning
 
[[7L 2s (81/32-equivalent)]] - Pythagorean tuning
 
[[7L 2s (28/11-equivalent)]] - Neogothic tuning
 
[[7L 2s (18/7-equivalent)]] - idealized Archytas tuning
Retrieved from "https://en.xen.wiki/w/User:Moremajorthanmajor/7L_2s_(major_tenth-equivalent)"