10-form: Difference between revisions
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[[Taric]] reverses the small and large steps of jaric. Its generator is an [[oneirotonic]] fifth rather than a mosdiatonic one. | [[Taric]] reverses the small and large steps of jaric. Its generator is an [[oneirotonic]] fifth rather than a mosdiatonic one. | ||
Taric is particularly notable since its major tetrad (0-400-733-1000 in 18edo) is close to +1+1+1 [[DR]]. | Taric is particularly notable since its major tetrad (0-400-733-1000 in 18edo) is close to +1+1+1 [[DR]] in certain tunings. | ||
It is also associated with [[Semibuzzard]], a temperament which extends [[Negripent]] to the 7-limit by allowing for its ~375c major third plus a tritone to stand for the harmonic seventh. | It is also associated with [[Semibuzzard]], a temperament which extends [[Negripent]] to the 7-limit by allowing for its ~375c major third plus a tritone to stand for the harmonic seventh. | ||
Revision as of 19:57, 18 February 2026
The 10-form describes the structure based around a set of 10 pitch classes or high-level interval regions per octave, as opposed to the conventional 7. It is the simplest form that makes the fundamental distinctions necessary to represent the full 7-limit, expanding on the 7-form by adding three new interval classes: the latus, the tritone, and the antilatus. Important lati in this system are 7/6 and 8/7; their complements are 12/7 and 7/4 respectively, which are antilati; 10/7 and 7/5 fall into the tritone category.
Chords
10-form harmony can be constructed out of:
- Fundamental triad: 0-3-6\10, with inversions 0-3-7\10 and 0-4-7\10
- Fundamental tetrad: 0-3-6-8\10, with inversions 0-3-5-7\10, 0-2-4-7\10, and 0-2-5-8\10
Notes about distinctions
9/7, while conventionally a third, is generally a kind of imperfect fourth here. Same goes for 7/6 and being a latus, rather than a third.
Important scales
Blackdye
Blackdye is a quasi-diatonic aberrismic scale constructed as an "indecisive zarlino" of sorts, adding small steps called aberrismas in order to allow for finer control over the intervals used. Alternatively, it may be conceptualized as two Pythagorean pentic scales offset by 10/9.
Interval matrix in JI:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
|---|---|---|---|---|---|---|---|---|---|
| sLmLsLmLsL | 81/80 | 9/8 | 6/5 | 4/3 | 27/20 | 3/2 | 8/5 | 16/9 | 9/5 |
| LmLsLmLsLs | 10/9 | 32/27 | 320/243 | 4/3 | 40/27 | 128/81 | 1280/729 | 16/9 | 160/81 |
| mLsLmLsLsL | 16/15 | 32/27 | 6/5 | 4/3 | 64/45 | 128/81 | 8/5 | 16/9 | 9/5 |
| LsLmLsLsLm | 10/9 | 9/8 | 5/4 | 4/3 | 40/27 | 3/2 | 5/3 | 27/16 | 15/8 |
| sLmLsLsLmL | 81/80 | 9/8 | 6/5 | 4/3 | 27/20 | 3/2 | 243/160 | 27/16 | 9/5 |
| LmLsLsLmLs | 10/9 | 32/27 | 320/243 | 4/3 | 40/27 | 3/2 | 5/3 | 16/9 | 160/81 |
| mLsLsLmLsL | 16/15 | 32/27 | 6/5 | 4/3 | 27/20 | 3/2 | 8/5 | 16/9 | 9/5 |
| LsLsLmLsLm | 10/9 | 9/8 | 5/4 | 81/64 | 45/32 | 3/2 | 5/3 | 27/16 | 15/8 |
| sLsLmLsLmL | 81/80 | 9/8 | 729/640 | 81/64 | 27/20 | 3/2 | 243/160 | 27/16 | 9/5 |
| LsLmLsLmLs | 10/9 | 9/8 | 5/4 | 4/3 | 40/27 | 3/2 | 5/3 | 16/9 | 160/81 |
Interval matrix in 34edo tempering, which importantly tunes 320/243 and 729/320 as ~13/10 and ~15/13:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
|---|---|---|---|---|---|---|---|---|---|
| sLmLsLmLsL | 35.3 | 211.8 | 317.6 | 494.1 | 529.4 | 705.9 | 811.8 | 988.2 | 1023.5 |
| LmLsLmLsLs | 176.5 | 282.4 | 458.8 | 494.1 | 670.6 | 776.5 | 952.9 | 988.2 | 1164.7 |
| mLsLmLsLsL | 105.9 | 282.4 | 317.6 | 494.1 | 600.0 | 776.5 | 811.8 | 988.2 | 1023.5 |
| LsLmLsLsLm | 176.5 | 211.8 | 388.2 | 494.1 | 670.6 | 705.9 | 882.4 | 917.6 | 1094.1 |
| sLmLsLsLmL | 35.3 | 211.8 | 317.6 | 494.1 | 529.4 | 705.9 | 741.2 | 917.6 | 1023.5 |
| LmLsLsLmLs | 176.5 | 282.4 | 458.8 | 494.1 | 670.6 | 705.9 | 882.4 | 988.2 | 1164.7 |
| mLsLsLmLsL | 105.9 | 282.4 | 317.6 | 494.1 | 529.4 | 705.9 | 811.8 | 988.2 | 1023.5 |
| LsLsLmLsLm | 176.5 | 211.8 | 388.2 | 423.5 | 600.0 | 705.9 | 882.4 | 917.6 | 1094.1 |
| sLsLmLsLmL | 35.3 | 211.8 | 247.1 | 423.5 | 529.4 | 705.9 | 741.2 | 917.6 | 1023.5 |
| LsLmLsLmLs | 176.5 | 211.8 | 388.2 | 494.1 | 670.6 | 705.9 | 882.4 | 988.2 | 1164.7 |
Note that the 0-3-6-8\10 tetrad includes a wolf interval, e.g. 1/1-6/5-3/2-16/9, on most degrees; only one mode, LsLmLsLmLs, has a dominant tetrad 1/1-5/4-3/2-16/9 on it. Blackdye thus encourages tertian (0-3-6\10-based) harmony.
Pentawood
Blackwood[10], or pentawood, has the notable feature of every note of the scale having either a major or a minor chord built on it, which not even mosdiatonic has (as mosdiatonic has a diminished chord). However, this is at the cost of the fifth necessarily being tuned rather sharply. The scale has only two modes, which may be considered major and minor, and as a 1\5-octave scale lacks a single chain of identical intervals capable of describing it. It can be compared to Diaschismic[10]; instead of linking the third and antilatus, it makes the antilatus a perfect interval, with no distinctions available within the MOS form of the scale. Pentawood includes the structure of Archy temperament.
Additionally, pentawood is a tempering of the aforementioned blackdye.
Interval matrix in 15edo tuning:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
|---|---|---|---|---|---|---|---|---|---|
| Major (LsLsLsLsLs) | 160.0 | 240.0 | 400.0 | 480.0 | 640.0 | 720.0 | 880.0 | 960.0 | 1120.0 |
| Minor (sLsLsLsLsL) | 80.0 | 320.0 | 560.0 | 800.0 | 1040.0 |
Pajara[10]
Called jaric temperament-agnostically, this scale (with the pattern ssssLssssL) is represented by Pajara temperament (Diaschismic if the 7-limit interpretations are not accepted). Pajara[10], along with taric, lemon, and lime, gives the 3\10 (representing the simplest 5-limit intervals 5/4 and 6/5) the same distinction as the 8\10 (representing the intervals 12/7 and 7/4), always separating them by a tritone in any given MOS mode. Therefore, the qualities of the two can be linked to form a major/minor dichotomy based upon the harmonic tetrad.
Interval matrix in 22edo tuning:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
|---|---|---|---|---|---|---|---|---|---|
| ssssLssssL | 109.1 | 218.2 | 327.3 | 436.4 | 600.0 | 709.1 | 818.2 | 927.3 | 1036.4 |
| sssLssssLs | 109.1 | 218.2 | 327.3 | 490.9 | 600.0 | 709.1 | 818.2 | 927.3 | 1090.9 |
| ssLssssLss | 109.1 | 218.2 | 381.8 | 490.9 | 600.0 | 709.1 | 818.2 | 981.8 | 1090.9 |
| sLssssLsss | 109.1 | 272.7 | 381.8 | 490.9 | 600.0 | 709.1 | 872.7 | 981.8 | 1090.9 |
| LssssLssss | 163.6 | 272.7 | 381.8 | 490.9 | 600.0 | 763.6 | 872.7 | 981.8 | 1090.9 |
Pentachordal scale
Interval matrix in 22edo tuning:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
|---|---|---|---|---|---|---|---|---|---|
| sssLsssssL | 109.1 | 218.2 | 327.3 | 490.9 | 600.0 | 709.1 | 818.2 | 927.3 | 1036.4 |
| ssLsssssLs | 109.1 | 218.2 | 381.8 | 490.9 | 600.0 | 709.1 | 818.2 | 927.3 | 1090.9 |
| sLsssssLss | 109.1 | 272.7 | 381.8 | 490.9 | 600.0 | 709.1 | 818.2 | 981.8 | 1090.9 |
| LsssssLsss | 163.6 | 272.7 | 381.8 | 490.9 | 600.0 | 709.1 | 872.7 | 981.8 | 1090.9 |
| sssssLsssL | 109.1 | 218.2 | 327.3 | 436.4 | 545.5 | 709.1 | 818.2 | 927.3 | 1036.4 |
| ssssLsssLs | 109.1 | 218.2 | 327.3 | 436.4 | 600.0 | 709.1 | 818.2 | 927.3 | 1090.9 |
| sssLsssLss | 109.1 | 218.2 | 327.3 | 490.9 | 600.0 | 709.1 | 818.2 | 981.8 | 1090.9 |
| ssLsssLsss | 109.1 | 218.2 | 381.8 | 490.9 | 600.0 | 709.1 | 872.7 | 981.8 | 1090.9 |
| sLsssLssss | 109.1 | 272.7 | 381.8 | 490.9 | 600.0 | 763.6 | 872.7 | 981.8 | 1090.9 |
| LsssLsssss | 163.6 | 272.7 | 381.8 | 490.9 | 654.5 | 763.6 | 872.7 | 981.8 | 1090.9 |
Taric
Taric reverses the small and large steps of jaric. Its generator is an oneirotonic fifth rather than a mosdiatonic one.
Taric is particularly notable since its major tetrad (0-400-733-1000 in 18edo) is close to +1+1+1 DR in certain tunings.
It is also associated with Semibuzzard, a temperament which extends Negripent to the 7-limit by allowing for its ~375c major third plus a tritone to stand for the harmonic seventh.
Interval matrix in 18edo tuning:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
|---|---|---|---|---|---|---|---|---|---|
| LLLLsLLLLs | 133.3 | 266.7 | 400.0 | 533.3 | 600.0 | 733.3 | 866.7 | 1000.0 | 1133.3 |
| LLLsLLLLsL | 133.3 | 266.7 | 400.0 | 466.7 | 600.0 | 733.3 | 866.7 | 1000.0 | 1066.7 |
| LLsLLLLsLL | 133.3 | 266.7 | 333.3 | 466.7 | 600.0 | 733.3 | 866.7 | 933.3 | 1066.7 |
| LsLLLLsLLL | 133.3 | 200.0 | 333.3 | 466.7 | 600.0 | 733.3 | 800.0 | 933.3 | 1066.7 |
| sLLLLsLLLL | 66.7 | 200.0 | 333.3 | 466.7 | 600.0 | 666.7 | 800.0 | 933.3 | 1066.7 |
Interval matrix in 48edo tuning (supporting Semibuzzard):
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
|---|---|---|---|---|---|---|---|---|---|
| LLLLsLLLLs | 125 | 250 | 375 | 500 | 600 | 725 | 850 | 975 | 1100 |
| LLLsLLLLsL | 125 | 250 | 375 | 475 | 600 | 725 | 850 | 975 | 1075 |
| LLsLLLLsLL | 125 | 250 | 350 | 475 | 600 | 725 | 850 | 950 | 1075 |
| LsLLLLsLLL | 125 | 225 | 350 | 475 | 600 | 725 | 825 | 950 | 1075 |
| sLLLLsLLLL | 100 | 225 | 350 | 475 | 600 | 700 | 825 | 950 | 1075 |
Pentachordal taric
Interval matrix in 18edo tuning:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
|---|---|---|---|---|---|---|---|---|---|
| LLLsLLLLLs | 133.3 | 266.7 | 400.0 | 466.7 | 600.0 | 733.3 | 866.7 | 1000.0 | 1133.3 |
| LLsLLLLLsL | 133.3 | 266.7 | 333.3 | 466.7 | 600.0 | 733.3 | 866.7 | 1000.0 | 1066.7 |
| LsLLLLLsLL | 133.3 | 200.0 | 333.3 | 466.7 | 600.0 | 733.3 | 866.7 | 933.3 | 1066.7 |
| sLLLLLsLLL | 66.7 | 200.0 | 333.3 | 466.7 | 600.0 | 733.3 | 800.0 | 933.3 | 1066.7 |
| LLLLLsLLLs | 133.3 | 266.7 | 400.0 | 533.3 | 666.7 | 733.3 | 866.7 | 1000.0 | 1133.3 |
| LLLLsLLLsL | 133.3 | 266.7 | 400.0 | 533.3 | 600.0 | 733.3 | 866.7 | 1000.0 | 1066.7 |
| LLLsLLLsLL | 133.3 | 266.7 | 400.0 | 466.7 | 600.0 | 733.3 | 866.7 | 933.3 | 1066.7 |
| LLsLLLsLLL | 133.3 | 266.7 | 333.3 | 466.7 | 600.0 | 733.3 | 800.0 | 933.3 | 1066.7 |
| LsLLLsLLLL | 133.3 | 200.0 | 333.3 | 466.7 | 600.0 | 666.7 | 800.0 | 933.3 | 1066.7 |
| sLLLsLLLLL | 66.7 | 200.0 | 333.3 | 466.7 | 533.3 | 666.7 | 800.0 | 933.3 | 1066.7 |
Interval matrix in 48edo tuning (supporting Semibuzzard):
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
|---|---|---|---|---|---|---|---|---|---|
| LLLsLLLLLs | 125 | 250 | 375 | 475 | 600 | 725 | 850 | 975 | 1100 |
| LLsLLLLLsL | 125 | 250 | 350 | 475 | 600 | 725 | 850 | 975 | 1075 |
| LsLLLLLsLL | 125 | 225 | 350 | 475 | 600 | 725 | 850 | 950 | 1075 |
| sLLLLLsLLL | 100 | 225 | 350 | 475 | 600 | 725 | 825 | 950 | 1075 |
| LLLLLsLLLs | 125 | 250 | 375 | 500 | 625 | 725 | 850 | 975 | 1100 |
| LLLLsLLLsL | 125 | 250 | 375 | 500 | 600 | 725 | 850 | 975 | 1075 |
| LLLsLLLsLL | 125 | 250 | 375 | 475 | 600 | 725 | 850 | 950 | 1075 |
| LLsLLLsLLL | 125 | 250 | 350 | 475 | 600 | 725 | 825 | 950 | 1075 |
| LsLLLsLLLL | 125 | 225 | 350 | 475 | 600 | 700 | 825 | 950 | 1075 |
| sLLLsLLLLL | 100 | 225 | 350 | 475 | 575 | 700 | 825 | 950 | 1075 |
