Mohajira: Difference between revisions
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'''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/ | '''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 | 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]]. | ||
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). | 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 | For technical data, see [[Meantone family #Mohajira]]. | ||
== Interval chain == | == Interval chain == | ||
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| 3 | | 3 | ||
| 1045.5 | | 1045.5 | ||
| 20/11 | | 11/6, 20/11 | ||
|- | |- | ||
| 4 | | 4 | ||
Line 45: | Line 45: | ||
| 5 | | 5 | ||
| 542.5 | | 542.5 | ||
| '''11/8''' | | '''11/8''', 15/11 | ||
|- | |- | ||
| 6 | | 6 | ||
Line 53: | Line 53: | ||
| 7 | | 7 | ||
| 39.4 | | 39.4 | ||
| 33/32 | | 33/32, 36/35, 45/44, <br>55/54, 64/63 | ||
|- | |- | ||
| 8 | | 8 | ||
Line 73: | Line 73: | ||
| 12 | | 12 | ||
| 581.9 | | 581.9 | ||
| 45/32 | | 25/18, 45/32 | ||
|- | |- | ||
| 13 | | 13 | ||
Line 81: | Line 81: | ||
| 14 | | 14 | ||
| 78.9 | | 78.9 | ||
| 25/24 | | 22/21, 25/24 | ||
|- | |- | ||
| 15 | | 15 | ||
Line 90: | Line 90: | ||
| 775.9 | | 775.9 | ||
| 11/7 | | 11/7 | ||
|- | |||
| 17 | |||
| 1124.3 | |||
| 27/14, 40/21 | |||
|} | |} | ||
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| -1 | | -1 | ||
| 851.5 | | 851.5 | ||
| 44/27 | | 18/11, 44/27 | ||
|- | |- | ||
| -2 | | -2 | ||
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| -5 | | -5 | ||
| 657.5 | | 657.5 | ||
| 16/11 | | 16/11, 22/15 | ||
|- | |- | ||
| -6 | | -6 | ||
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| -7 | | -7 | ||
| 1160.6 | | 1160.6 | ||
| 64/33 | | 35/18, 63/32, 64/33, <br>88/45, 108/55 | ||
|- | |- | ||
| -8 | | -8 | ||
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| -12 | | -12 | ||
| 618.1 | | 618.1 | ||
| 64/45 | | 36/25, 64/45 | ||
|- | |- | ||
| -13 | | -13 | ||
Line 158: | Line 162: | ||
| -14 | | -14 | ||
| 1121.1 | | 1121.1 | ||
| 48/25 | | 21/11, 48/25 | ||
|- | |- | ||
| -15 | | -15 | ||
Line 167: | Line 171: | ||
| 424.1 | | 424.1 | ||
| 14/11 | | 14/11 | ||
|- | |||
| -17 | |||
| 75.7 | |||
| 21/20, 28/27 | |||
|} | |} | ||
</div> | </div> | ||
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== Scales and harmony == | == Scales and harmony == | ||
: {{ | : {{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 prime-optimized 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 prime-optimized 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 == | == Notes == | ||
<references group="note" /> | <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]] |