Mohajira

From Xenharmonic Reference

Mohajira (stressed on the "ha"), 24 & 7, is an extension to Rastmatic (Neutral) that is a Meantone temperament. In other words, the generator is a neutral third representing 11/9, which stacks twice to a perfect fifth and eight times to the interval 5/1 (octave-reduced: 5/4). Thus, 243/242 and 81/80 are both tempered out. Mohajira, due to its neutral third generator, is a 7 cluster temperament, and its main MOS scale is 3L 4s ("mosh", LsLsLss), with the notable MODMOS ssLLssL (which is associated with the maqam Rast and (perhaps not coincidentally) the result of applying Mohajira tempering to the just equiheptatonic). Mohajira equates 11/10 with 12/11 and 9/8 with 10/9, and by this distinguishes itself from other temperaments of the just equiheptatonic such as Flattone and Porcupine.

As a tuning generated by the unstable interval 11/9, it is perhaps viable to directly map 11/9 to edos and determine the tuning of 11 from there, instead of vice versa.

Generally, Mohajira is also extended to include prime 7 as the semidiminished seventh, though an alternate mapping also available in 31edo shares septimal Meantone's mapping of 7 (and contributes much to 31edo's 7-limit structure).

Interval table

Generator step table:

# up Cents Just interval Neutral diatonic notation # down Cents Just interval Neutral diatonic notation
0 0 1/1 P1 0 1200 2/1 P8
1 348 11/9, 27/22 n3 -1 852 18/11, 44/27 n6
2 696 3/2 P5 -2 504 4/3 P4
3 1044 11/6, 20/11 n7 -3 156 11/10, 12/11 n2
4 192 10/9, 9/8 M2 -4 1008 9/5, 16/9 m7
5 540 11/8, 15/11 sA4 -5 660 16/11, 22/15 sd5
6 888 5/3 M6 -6 312 6/5 m3
7 36 33/32 sA1 -7 1164 64/33 sd8
8 384 5/4 M3 -8 816 8/5 m6

Patent vals

Mohajira patent vals are tunings of Meantone for which 11 is mapped to the semiaugmented fourth. As such, they are a subset of possible Meantone tunings. In fact, the space is rather limited due to how necessarily flat 11/8 is (most Meantone tunings have an 11/9 sharp of neutral). Unless otherwise stated, these also support the 7-limit version of the temperament.

EDO Generator tuning Fifth tuning
24 350c 700c
55 349.1c 698.2c
31 348.4c 696.8c
38 347.4c 694.7c
7 342.9c 685.7c

2.3.5.11/9 "patent" vals

It may also be desirable to optimize equal temperament mappings for 11/9 instead of 11 itself. Mohajira tunings that do this and are not mentioned above are the following, and usually utilize the second-best 11/8:

EDO Fifth tuning Generator tuning 11/8 tuning*
134 698.51 349.25 546.27
86 697.67 348.84 544.19
117 697.44 348.72 543.59
100 696.00 348.00 540.00
69 695.65 347.83 539.13
45* 693.33 346.67 533.33
52* 692.31 346.15 530.77

**The 11/8 tuning is not the best 11/8.

*45e and 52e do not support septimal Mohajira.


ViewTalkEditRegular temperaments
Rank-2
Acot Blackwood (1/5-octave) • Whitewood (1/7-octave) • Compton (1/12-octave)
Monocot MeantoneSchismicLeapdayArchy
Complexity 2 Diaschismic (diploid monocot) • Pajara (diploid monocot) • Injera (diploid monocot) • Rastmatic (dicot) • Mohajira (dicot) • Intertridecimal (dicot) • Interseptimal (alpha-dicot)
Complexity 3 Augmented (triploid) • Misty (triploid) • Slendric (tricot) • Porcupine (omega-tricot)
Complexity 4 Diminished (tetraploid) • Tetracot (tetracot) • Buzzard (alpha-tetracot) • Squares (beta-tetracot) • Negri (omega-tetracot)
Complexity 5-6 Magic (alpha-pentacot) • Amity (gamma-pentacot) • Kleismic (alpha-hexacot) • Miracle (hexacot)
Higher complexity Orwell (alpha-heptacot) • Sensi (beta-heptacot) • Octacot (octacot) • Wurschmidt (beta-octacot) • Valentine (enneacot) • Ammonite (epsilon-enneacot) • Myna (beta-decacot) • Ennealimmal (enneaploid dicot)
Straddle-3 A-Team (alter-tricot) • Machine (alter-monocot)
No-3 Trismegistus (alpha-triseph) • Orgone (trimech) • Didacus (diseph)
No-octaves Sensamagic (monogem)
Exotemperament DicotMavilaFather
Higher-rank
Rank-3 HemifamityMarvelParapyth