Mohajira: Difference between revisions
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{{ | {{Interwiki | ||
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'''Mohajira''' (/mʊˈhɑːdʒɪɹə, -hæ-/ ''muu-HA(H)-jirr-ə'' or /məˈhɑːdʒɪɹə, -hæ-/ ''mə-HA(H)-jirr-ə'', named by Jacques Dudon from Arabic مهاجرة ''Muhājirah'') is a [[Meantone_family#Mohajira|meantone]] temperament that splits 3/2 into two 11/9 | {{Infobox regtemp | ||
| Title = Mohajira | |||
| Subgroups = 2.3.5.7, 2.3.5.7.11 | |||
| Comma basis = [[81/80]], [[6144/6125]] (7-limit); <br>[[81/80]], [[121/120]], [[176/175]] (11-limit) | |||
| Edo join 1 = 24 | Edo join 2 = 31 | |||
| Mapping = 1; 2 8 -11 5 | |||
| Generators = 11/9 | |||
| Generators tuning = 348.5 | |||
| Optimization method = CWE | |||
| MOS scales = [[3L 4s]], [[7L 3s]], [[7L 10s]], [[7L 17s]] | |||
| Odd limit 1 = 9 | Mistuning 1 = 10.8 | Complexity 1 = 24 | |||
| Odd limit 2 = 11-limit 21 | Mistuning 2 = 10.8 | Complexity 2 = 24 | |||
}} | |||
'''Mohajira'''<ref group="note">(/mʊˈhɑːdʒɪɹə, -hæ-/ ''muu-HA(H)-jirr-ə'' or /məˈhɑːdʒɪɹə, -hæ-/ ''mə-HA(H)-jirr-ə'', named by Jacques Dudon from Arabic مهاجرة ''Muhājirah'')</ref> is a [[Meantone_family#Mohajira|meantone]] temperament that splits [[3/2]] into two [[11/9]] generators and the [[6/5]] into two [[11/10]]'s, thus equating 11/10 with [[12/11]] and 11/9 with [[27/22]]. As a result, eight 11/9's reach [[5/4]], and five reach [[11/8]]. It [[tempering out|tempers out]] the biyatisma ([[121/120]]) and the [[rastma]] (along with meantone's [[syntonic comma]]). It can be thought of as meantone with [[quartertone]]s as it merely splits the generator 3/2 into two equally spaced neutral thirds. Among the most common is the 7-note mos Mohajira[7] which consists of the steps LsLsLss, as well as the [[modmos]] "Rast" which merely flats the fourth by one quartertone. | |||
The simplest form of this temperament, in 2.3.5.11, is sometimes called '''mohaha'''. To extend mohaha into full 11-limit mohajira, 7 is found at 11 neutral thirds down, tempering out the [[valinorsma]] such that 14/11 is equated with 32/25. Mohaha is tuned best sharp of 31edo's neutral third. An alternate extension, ''migration'', is optimized for flatter tunings and finds 7 at 20 generators up, the same mapping as in [[septimal meantone]] which tempers out [[225/224]]. | |||
For | As mohajira is a neutral third system, 13 also has a reasonable mapping at −1 generator, equating 11/9 and 16/13. Subsequently, 17 is mapped to −10 generators (the diatonic semitone) and 19 to −6 generators (the minor third). | ||
For technical data, see [[Meantone family #Mohajira]]. | |||
== Interval chain == | == Interval chain == | ||
In the following tables, odd harmonics 1–11 are shown in '''bold'''. | |||
<div style="display: inline-grid; margin-right: 25px;"> | |||
{| class="wikitable center-1 right-2" | |||
|- | |- | ||
!# | ! # | ||
!Cents* | ! Cents* | ||
! | ! Approximate ratios | ||
|- | |- | ||
|0 | | 0 | ||
|0 | | 0.0 | ||
|1/1 | | '''1/1''' | ||
|0 | |- | ||
|1200 | | 1 | ||
|2/1 | | 348.5 | ||
| 11/9, 27/22 | |||
|- | |||
| 2 | |||
| 697.0 | |||
| '''3/2''' | |||
|- | |||
| 3 | |||
| 1045.5 | |||
| 11/6, 20/11 | |||
|- | |||
| 4 | |||
| 194.0 | |||
| '''9/8''', 10/9 | |||
|- | |||
| 5 | |||
| 542.5 | |||
| '''11/8''', 15/11 | |||
|- | |||
| 6 | |||
| 890.9 | |||
| 5/3 | |||
|- | |||
| 7 | |||
| 39.4 | |||
| 33/32, 36/35, 45/44, <br>55/54, 64/63 | |||
|- | |||
| 8 | |||
| 387.9 | |||
| '''5/4''' | |||
|- | |||
| 9 | |||
| 736.4 | |||
| 32/21 | |||
|- | |||
| 10 | |||
| 1084.9 | |||
| 15/8 | |||
|- | |||
| 11 | |||
| 233.4 | |||
| 8/7 | |||
|- | |||
| 12 | |||
| 581.9 | |||
| 25/18, 45/32 | |||
|- | |||
| 13 | |||
| 930.4 | |||
| 12/7 | |||
|- | |||
| 14 | |||
| 78.9 | |||
| 22/21, 25/24 | |||
|- | |||
| 15 | |||
| 427.4 | |||
| 9/7 | |||
|- | |||
| 16 | |||
| 775.9 | |||
| 11/7 | |||
|- | |||
| 17 | |||
| 1124.3 | |||
| 27/14, 40/21 | |||
|} | |||
</div> | |||
<div style="display: inline-grid; margin-right: 25px;"> | |||
{| class="wikitable center-1 right-2" | |||
|- | |||
! # | |||
! Cents* | |||
! Approximate ratios | |||
|- | |||
| 0 | |||
| 1200.0 | |||
| '''2/1''' | |||
|- | |- | ||
| -1 | | -1 | ||
|851. | | 851.5 | ||
|44/27 | | 18/11, 44/27 | ||
|- | |- | ||
| -2 | | -2 | ||
|503. | | 503.0 | ||
|4/3 | | 4/3 | ||
|- | |- | ||
| -3 | | -3 | ||
| | | 154.5 | ||
|11/10, 12/11 | | 11/10, 12/11 | ||
|- | |- | ||
| -4 | | -4 | ||
| | | 1006.0 | ||
|9/5, 16/9 | | 9/5, 16/9 | ||
|- | |- | ||
| -5 | | -5 | ||
| | | 657.5 | ||
|16/11 | | 16/11, 22/15 | ||
|- | |- | ||
| -6 | | -6 | ||
| | | 309.1 | ||
|6/5 | | 6/5 | ||
|- | |- | ||
| -7 | | -7 | ||
| | | 1160.6 | ||
|64/33 | | 35/18, 63/32, 64/33, <br>88/45, 108/55 | ||
|- | |- | ||
| -8 | | -8 | ||
| | | 812.1 | ||
|8/5 | | 8/5 | ||
|- | |- | ||
| -9 | | -9 | ||
| | | 463.6 | ||
| | | 21/16 | ||
|- | |- | ||
| -10 | | -10 | ||
| | | 115.1 | ||
| | | 16/15 | ||
|- | |- | ||
| -11 | | -11 | ||
| | | 966.6 | ||
| | | '''7/4''' | ||
|- | |- | ||
| -12 | | -12 | ||
| | | 618.1 | ||
| | | 36/25, 64/45 | ||
|- | |- | ||
| -13 | | -13 | ||
| | | 269.6 | ||
| | | 7/6 | ||
|- | |- | ||
| -14 | | -14 | ||
| | | 1121.1 | ||
| | | 21/11, 48/25 | ||
|- | |||
| -15 | |||
| 772.6 | |||
| 14/9 | |||
|- | |||
| -16 | |||
| 424.1 | |||
| 14/11 | |||
|- | |||
| -17 | |||
| 75.7 | |||
| 21/20, 28/27 | |||
|} | |} | ||
</div> | |||
<nowiki/>* In 11-limit CWE tuning, octave reduced | |||
== Scales and harmony == | == Scales and harmony == | ||
There are seven modes of mohajira's 7-note | : {{Main| Mohajira/Scales }} | ||
There are seven modes of mohajira's 7-note mos (named [[mosh]] due to being "mohajira-ish") which are structured in an analogous way to the seven modes of the major scale. They can be thought of as quarter tone altered modes in a 24edo setting, but also as microtonal altered scales in any equal temperament. While the Mohajira[7] mos by itself is quite beautiful, the modMOS Rast tends to be more expressive as it contains a few major and minor thirds allowing for more contrast. | |||
== Tunings == | |||
{| class="wikitable mw-collapsible mw-collapsed" | |||
|+ style="font-size: 105%; white-space: nowrap;" | 7-limit norm-based tunings | |||
|- | |||
! rowspan="2" | | |||
! colspan="3" | Euclidean | |||
|- | |||
! Constrained | |||
! Constrained & skewed | |||
! Destretched | |||
|- | |||
! Tenney | |||
| CTE: ~128/105 = 348.4374{{c}} | |||
| CWE: ~128/105 = 348.4194{{c}} | |||
| POTE: ~128/105 = 348.4149{{c}} | |||
|} | |||
{| class="wikitable mw-collapsible mw-collapsed" | |||
|+ style="font-size: 105%; white-space: nowrap;" | 11-limit norm-based tunings | |||
|- | |||
! rowspan="2" | | |||
! colspan="3" | Euclidean | |||
|- | |||
! Constrained | |||
! Constrained & skewed | |||
! Destretched | |||
|- | |||
! Tenney | |||
| CTE: ~11/9 = 348.5608{{c}} | |||
| CWE: ~11/9 = 348.4910{{c}} | |||
| POTE: ~11/9 = 348.4767{{c}} | |||
|} | |||
== Notes == | |||
<references group="note" /> | |||
[[Category:Mohajira| ]] <!-- main article --> | [[Category:Mohajira| ]] <!-- main article --> | ||
[[Category:Rank-2 temperaments]] | [[Category:Rank-2 temperaments]] | ||
[[Category:Meantone family]] | [[Category:Meantone family]] | ||
[[Category:Porwell temperaments]] | |||
[[Category:Rastmic clan]] | |||