7L 2s: Difference between revisions

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{{Infobox MOS
{{Infobox MOS}}
| Name = mavila, superdiatonic
 
| Periods = 1
{{MOS intro}}
| nLargeSteps = 7
Scales of this form are strongly associated with [[Armodue theory]], as applied to septimal mavila and Hornbostel temperaments. [[Trismegistus]] is also a usable temperament.
| nSmallSteps = 2
== Name ==
| Equalized = 5
The [[TAMNAMS]] name for this pattern is '''armotonic''', in reference to Armodue theory. '''Superdiatonic''' is also in use.
| Paucitonic = 4
 
| Pattern = LLLsLLLLs
== Scale properties ==
{{TAMNAMS use}}
 
=== Intervals ===
{{MOS intervals}}
 
=== Generator chain ===
{{MOS genchain}}
 
=== Modes ===
{{MOS mode degrees}}
 
=== Proposed mode names ===
The Ad- mode names proposed by [[groundfault]] have the feature of matching up the middle 7 modes with the antidiatonic mode names in the generator arc.
{{MOS modes
| Table Headers=
Super- Mode Names $
Ad- Mode Names (ground) $
| Table Entries=
Superlydian $
TBD $
Superionian $
Adlocrian $
Supermixolydian $
Adphrygian $
Supercorinthian $
Adaeolian $
Superolympian $
Addorian $
Superdorian $
Admixolydian $
Superaeolian $
Adionian $
Superphrygian $
Adlydian $
Superlocrian $
TBD
}}
}}


'''7L 2s''', '''mavila superdiatonic''' or '''superdiatonic''' refers to the structure of octave-equivalent [[MOS]] scales with generators ranging from 4\7 (four degrees of [[7edo]] = 685.71¢) to 5\9 (five degrees of [[9edo]] = 666.67¢). In the case of 9edo, L and s are the same size; in the case of 7edo, s becomes so small it disappears (and all that remains are the seven equal L's).
== Note names==
 
7L 2s, when viewed under Armodue theory, can be notated using Armodue notation.
From a regular temperament perspective (i.e. approximating [[low JI]] intervals), this MOS pattern is essentially synonymous to [[mavila]]. If you're looking for highly accurate scales (that is, ones that approximate low JI closely), there are much better scale patterns to look at. However, if 678 cents is an acceptable 3/2 to you, then [[Pelogic_family|mavila]] is an important [[harmonic entropy]] minimum here. So a general name for this MOS pattern could be "mavila superdiatonic" or simply 'Superdiatonic'.


These scales are strongly associated with [[mavila]] system, which can be divided into two systems:
== Theory ==
* the [[Armodue|Armodue]] project/system and its associated [[armodue]] temperament, with fifths sharper than 5\9 (666.7¢) and flatter than 9\16 (675¢).
=== Temperament interpretations ===
* Hornbostel temperament, with fifths sharper than 9\16 (675¢) and flatter than 4\7 (685.71¢).
[[Pelogic family#Mavila|Mavila]] is an important harmonic entropy minimum here, insofar as 670-680{{c}} can be considered a fifth. Other temperaments include septimal mavila, hornbostel, and trismegistus.


Some high JI approximations of the generator: 31/21, 34/23, 65/44, 71/48, 99/67, 105/71, 108/73, 133/90, 145/98, 176/119, 250/169. These could be used to guide the construction of neji versions of superdiatonic scales or edos.
== Scale tree ==
== Scale tree ==
{| class="wikitable"
{{MOS tuning spectrum
|-
| 1/1 = Near exact-7/6 [[Pelogic_family#Armodue|Armodue]]
! colspan="5" | Generator
| 4/3 = Near exact-20/17 [[Pentagoth]]
! | Generator size (cents)
| 7/5 = Near exact-5/4 [[Mavila]]
! | L/s
| 3/2 = Near exact-13/11 Pentagoth
! | Comments
| 7/4 = Near exact-7/4 [[Pelogic_family#Armodue|Armodue]]
|-
| 10/3 = Near exact-6/5 [[Mavila]]
| | 4\[[7edo|7]]
| 6/1 = [[Gravity]] ↓
| |
}}
| |
| |
| |
| | 685.714
| | 1/0
| |
|-
| |
| |
| |
| |
| | 21\37
| | 681.08
| | 5/1
| |
|-
| |
| |
| |
| | 17\30
| |
| | 680
| | 4/1
| |
|-
| |
| |
| | 13\23
| |
| |
| | 678.261
| | 3/1
| |
|-
| |
| |
| |
| | 22\39
| |
| | 676.923
| | 5/2
|-
| |
| | 9\16
| |
| |
| |
| | 675
| | 2/1
| | Boundary of propriety; smaller generators are strictly proper
|-
| |
| |
| | 23\41
| |
| |
| | 673.171
| | 5/3
| |
|-
| |
| |
| |
| |
| |
| | 672.85
| | φ/1
| | Golden mavila
|-
| |
| |
| | 14\25
| |  
| |
| | 672
| | 3/2
| |
|-
| |
| |
| |
| | 19\34
| |
| | 670.588
| | 4/3
| |
|-
| |
| |
| |
| |
| | 24\43
| | 669.767
| | 5/4
| |
|-
| | 5\[[9edo|9]]
| |
| |
| |
| |
| | 666.667
| | 1/1
| |
|}
 
== Primodal theory ==
=== Neji versions of superdiatonic modes ===
* 40:48:52:54:59:64:70:77:80 Pental Superionian
=== 16nejis ===
=== 23nejis ===
=== 25nejis ===


[[Category:Theory]]
[[Category:9-tone scales]]
[[Category:Scales]]
[[Category:MOS scales]]
[[Category:Abstract MOS patterns]]
[[Category:Mavila]]
[[Category:Mavila]]
[[Category:Superdiatonic]]