2L 5s
| ↖ 1L 4s | ↑ 2L 4s | 3L 4s ↗ |
| ← 1L 5s | 2L 5s | 3L 5s → |
| ↙ 1L 6s | ↓ 2L 6s | 3L 6s ↘ |
┌╥┬┬╥┬┬┬┐ │║││║││││ │││││││││ └┴┴┴┴┴┴┴┘
sssLssL
2L 5s, named antidiatonic in TAMNAMS, is a 2/1-equivalent (octave-equivalent) moment of symmetry scale containing 2 large steps and 5 small steps, repeating every octave. Generators that produce this scale range from 514.3 ¢ to 600 ¢, or from 600 ¢ to 685.7 ¢. Antidiatonic is similar to diatonic except interval classes are flipped. For example, there are natural, harmonic, and melodic major scales instead of minor scales, and its locrian scale, called "antilocrian", has an augmented fifth instead of a diminished fifth. The flatter the fifth, the less this scale resembles diatonic.
The most well-known forms of this scale are produced by mavila temperament, with fifths sharp enough to resemble diatonic. Other temperaments that produce this scale include score, casablanca, and triton, whose fifths are so flat that they cannot be interpreted as a diatonic 5th, flattened or otherwise.
Name
TAMNAMS suggests the temperament-agnostic name antidiatonic for this scale, adopted from the common use of the term to refer to diatonic (5L 2s) but with the large and small steps switched.
Intervals
- This article uses TAMNAMS conventions for the names of this scale's intervals and scale degrees. The use of 1-indexed ordinal names is reserved for interval regions.
| Intervals | Steps subtended |
Range in cents | ||
|---|---|---|---|---|
| Generic | Specific | Abbrev. | ||
| 0-pelstep | Perfect 0-pelstep | P0pels | 0 | 0.0 ¢ |
| 1-pelstep | Minor 1-pelstep | m1pels | s | 0.0 ¢ to 171.4 ¢ |
| Major 1-pelstep | M1pels | L | 171.4 ¢ to 600.0 ¢ | |
| 2-pelstep | Minor 2-pelstep | m2pels | 2s | 0.0 ¢ to 342.9 ¢ |
| Major 2-pelstep | M2pels | L + s | 342.9 ¢ to 600.0 ¢ | |
| 3-pelstep | Diminished 3-pelstep | d3pels | 3s | 0.0 ¢ to 514.3 ¢ |
| Perfect 3-pelstep | P3pels | L + 2s | 514.3 ¢ to 600.0 ¢ | |
| 4-pelstep | Perfect 4-pelstep | P4pels | L + 3s | 600.0 ¢ to 685.7 ¢ |
| Augmented 4-pelstep | A4pels | 2L + 2s | 685.7 ¢ to 1200.0 ¢ | |
| 5-pelstep | Minor 5-pelstep | m5pels | L + 4s | 600.0 ¢ to 857.1 ¢ |
| Major 5-pelstep | M5pels | 2L + 3s | 857.1 ¢ to 1200.0 ¢ | |
| 6-pelstep | Minor 6-pelstep | m6pels | L + 5s | 600.0 ¢ to 1028.6 ¢ |
| Major 6-pelstep | M6pels | 2L + 4s | 1028.6 ¢ to 1200.0 ¢ | |
| 7-pelstep | Perfect 7-pelstep | P7pels | 2L + 5s | 1200.0 ¢ |
Notation
The most common way of notating this scale, particularly when working with mavila temperament, is to use the same note names and accidentals as that of diatonic (CDEFGAB, #, and b), but read as antidiatonic instead. There are, however, two ways of notating accidentals:
- Harmonic antidiatonic notation, where the sharps and flats of diatonic switch roles: sharps flatten and flats sharpen.
- Melodic antidiatonic notation, where the meaning of sharps and flats is preserved: sharps sharpen and flats flatten.
Under harmonic antidiatonic notation, the basic gamut (for D anti-dorian) is the following: D, E, Eb/F#, F, G, A, B, Bb/C#, C, D.
Under melodic antidiatonic notation, the basic gamut is the following: D, E, E#/Fb, F, G, A, B, B#/Cb, C, D.
Theory
Low harmonic entropy scales
There is one notable harmonic entropy minimum: Liese/triton, in which the generator is 7/5 (582.5¢) and three of them make a 3/1 (1902¢).
Temperament interpretations
2L 5s has several rank-2 temperament interpretations, such as:
- Mavila, with generators around 679.8¢.
- Casablanca, with generators around 657.8¢.
- Liese, with generators around 632.4¢.
Tuning ranges
Simple tunings
The simplest tunings are those with step ratios 2:1, 3:1, and 3:2, producing 9edo, 11edo, and 16edo.
|
MOS degrees is deprecated. Please use Template:MOS tunings instead. |
| Scale degree | 9edo (Basic, L:s = 2:1) | 11edo (Hard, L:s = 3:1) | 16edo (Soft, L:s = 3:2) | Approx. JI Ratios | |||
|---|---|---|---|---|---|---|---|
| Steps | Cents | Steps | Cents | Steps | Cents | ||
| Perfect 0-peldegree (unison) | 0 | 0 | 0 | 0 | 0 | 0 | 1/1 (exact) |
| Minor 1-peldegree | 1 | 133.3 | 1 | 109.1 | 2 | 150 | |
| Major 1-peldegree | 2 | 266.7 | 3 | 327.3 | 3 | 225 | |
| Minor 2-peldegree | 2 | 266.7 | 2 | 218.2 | 4 | 300 | |
| Major 2-peldegree | 3 | 400 | 4 | 436.4 | 5 | 375 | |
| Diminished 3-peldegree | 3 | 400 | 3 | 327.3 | 6 | 450 | |
| Perfect 3-peldegree | 4 | 533.3 | 5 | 545.5 | 7 | 525 | |
| Perfect 4-peldegree | 5 | 666.7 | 6 | 654.5 | 9 | 675 | |
| Augmented 4-peldegree | 6 | 800 | 8 | 872.7 | 10 | 750 | |
| Minor 5-peldegree | 6 | 800 | 7 | 763.6 | 11 | 825 | |
| Major 5-peldegree | 7 | 933.3 | 9 | 981.8 | 12 | 900 | |
| Minor 6-peldegree | 7 | 933.3 | 8 | 872.7 | 13 | 975 | |
| Major 6-peldegree | 8 | 1066.7 | 10 | 1090.9 | 14 | 1050 | |
| Perfect 7-peldegree (octave) | 9 | 1200 | 11 | 1200 | 16 | 1200 | 2/1 (exact) |
Soft-of-basic tunings
Much of the range for soft-of-basic antidiatonic tunings (1:1 to 2:1) corresponds to mavila temperament. Edos include 9edo (not shown), 16edo, and 23edo.
|
|
MOS degrees is deprecated. Please use Template:MOS tunings instead. |
| Scale degree | 16edo (Soft, L:s = 3:2) | 23edo (Supersoft, L:s = 4:3) | Approx. JI Ratios | ||
|---|---|---|---|---|---|
| Steps | Cents | Steps | Cents | ||
| Perfect 0-peldegree (unison) | 0 | 0 | 0 | 0 | 1/1 (exact) |
| Minor 1-peldegree | 2 | 150 | 3 | 156.5 | |
| Major 1-peldegree | 3 | 225 | 4 | 208.7 | |
| Minor 2-peldegree | 4 | 300 | 6 | 313 | |
| Major 2-peldegree | 5 | 375 | 7 | 365.2 | |
| Diminished 3-peldegree | 6 | 450 | 9 | 469.6 | |
| Perfect 3-peldegree | 7 | 525 | 10 | 521.7 | |
| Perfect 4-peldegree | 9 | 675 | 13 | 678.3 | |
| Augmented 4-peldegree | 10 | 750 | 14 | 730.4 | |
| Minor 5-peldegree | 11 | 825 | 16 | 834.8 | |
| Major 5-peldegree | 12 | 900 | 17 | 887 | |
| Minor 6-peldegree | 13 | 975 | 19 | 991.3 | |
| Major 6-peldegree | 14 | 1050 | 20 | 1043.5 | |
| Perfect 7-peldegree (octave) | 16 | 1200 | 23 | 1200 | 2/1 (exact) |
Hypohard tunings
The range of hard-of-basic tunings correspond to temperaments that have significantly flattened antidiatonic 5ths, such as score and casablanca. 20edo and 31edo represent these two temperaments quite well.
|
|
MOS degrees is deprecated. Please use Template:MOS tunings instead. |
| Scale degree | 20edo (Semihard, L:s = 5:2) | 31edo (L:s = 8:3) | Approx. JI Ratios | ||
|---|---|---|---|---|---|
| Steps | Cents | Steps | Cents | ||
| Perfect 0-peldegree (unison) | 0 | 0 | 0 | 0 | 1/1 (exact) |
| Minor 1-peldegree | 2 | 120 | 3 | 116.1 | |
| Major 1-peldegree | 5 | 300 | 8 | 309.7 | |
| Minor 2-peldegree | 4 | 240 | 6 | 232.3 | |
| Major 2-peldegree | 7 | 420 | 11 | 425.8 | |
| Diminished 3-peldegree | 6 | 360 | 9 | 348.4 | |
| Perfect 3-peldegree | 9 | 540 | 14 | 541.9 | |
| Perfect 4-peldegree | 11 | 660 | 17 | 658.1 | |
| Augmented 4-peldegree | 14 | 840 | 22 | 851.6 | |
| Minor 5-peldegree | 13 | 780 | 20 | 774.2 | |
| Major 5-peldegree | 16 | 960 | 25 | 967.7 | |
| Minor 6-peldegree | 15 | 900 | 23 | 890.3 | |
| Major 6-peldegree | 18 | 1080 | 28 | 1083.9 | |
| Perfect 7-peldegree (octave) | 20 | 1200 | 31 | 1200 | 2/1 (exact) |
Ultrahard tunings
Ultrahard tunings, particularly with the harder end of the spectrum, correspond to liese temperament, represent by edos such as 17edo 19edo, and larger edos such as 55edo.
|
|
MOS degrees is deprecated. Please use Template:MOS tunings instead. |
| Scale degree | 17edo (L:s = 6:1) | 19edo (L:s = 7:1) | 55edo (L:s = 20:3) | Approx. JI Ratios | |||
|---|---|---|---|---|---|---|---|
| Steps | Cents | Steps | Cents | Steps | Cents | ||
| Perfect 0-peldegree (unison) | 0 | 0 | 0 | 0 | 0 | 0 | 1/1 (exact) |
| Minor 1-peldegree | 1 | 70.6 | 1 | 63.2 | 3 | 65.5 | |
| Major 1-peldegree | 6 | 423.5 | 7 | 442.1 | 20 | 436.4 | |
| Minor 2-peldegree | 2 | 141.2 | 2 | 126.3 | 6 | 130.9 | |
| Major 2-peldegree | 7 | 494.1 | 8 | 505.3 | 23 | 501.8 | |
| Diminished 3-peldegree | 3 | 211.8 | 3 | 189.5 | 9 | 196.4 | |
| Perfect 3-peldegree | 8 | 564.7 | 9 | 568.4 | 26 | 567.3 | |
| Perfect 4-peldegree | 9 | 635.3 | 10 | 631.6 | 29 | 632.7 | |
| Augmented 4-peldegree | 14 | 988.2 | 16 | 1010.5 | 46 | 1003.6 | |
| Minor 5-peldegree | 10 | 705.9 | 11 | 694.7 | 32 | 698.2 | |
| Major 5-peldegree | 15 | 1058.8 | 17 | 1073.7 | 49 | 1069.1 | |
| Minor 6-peldegree | 11 | 776.5 | 12 | 757.9 | 35 | 763.6 | |
| Major 6-peldegree | 16 | 1129.4 | 18 | 1136.8 | 52 | 1134.5 | |
| Perfect 7-peldegree (octave) | 17 | 1200 | 19 | 1200 | 55 | 1200 | 2/1 (exact) |
Modes
| UDP | Cyclic order |
Step pattern |
Scale degree (peldegree) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |||
| 6|0 | 1 | LssLsss | Perf. | Maj. | Maj. | Perf. | Aug. | Maj. | Maj. | Perf. |
| 5|1 | 4 | LsssLss | Perf. | Maj. | Maj. | Perf. | Perf. | Maj. | Maj. | Perf. |
| 4|2 | 7 | sLssLss | Perf. | Min. | Maj. | Perf. | Perf. | Maj. | Maj. | Perf. |
| 3|3 | 3 | sLsssLs | Perf. | Min. | Maj. | Perf. | Perf. | Min. | Maj. | Perf. |
| 2|4 | 6 | ssLssLs | Perf. | Min. | Min. | Perf. | Perf. | Min. | Maj. | Perf. |
| 1|5 | 2 | ssLsssL | Perf. | Min. | Min. | Perf. | Perf. | Min. | Min. | Perf. |
| 0|6 | 5 | sssLssL | Perf. | Min. | Min. | Dim. | Perf. | Min. | Min. | Perf. |
Proposed Names
Modes of antidiatonic are usually named as "anti-" combined with the corresponding mode of the diatonic scale, where anti-locrian is the brightest mode and anti-lydian is the darkest mode. CompactStar also gave original names based on regions of France to mirror how modes of the diatonic scale are named on regions of Greece and Turkey.
| UDP | Cyclic order |
Step pattern |
|---|---|---|
| 6|0 | 1 | LssLsss |
| 5|1 | 4 | LsssLss |
| 4|2 | 7 | sLssLss |
| 3|3 | 3 | sLsssLs |
| 2|4 | 6 | ssLssLs |
| 1|5 | 2 | ssLsssL |
| 0|6 | 5 | sssLssL |