2L 3s (3/2-equivalent): Difference between revisions
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Revision as of 04:02, 5 July 2023
↖ 1L 2s⟨3/2⟩ | ↑ 2L 2s⟨3/2⟩ | 3L 2s⟨3/2⟩ ↗ |
← 1L 3s⟨3/2⟩ | 2L 3s (3/2-equivalent) | 3L 3s⟨3/2⟩ → |
↙ 1L 4s⟨3/2⟩ | ↓ 2L 4s⟨3/2⟩ | 3L 4s⟨3/2⟩ ↘ |
┌╥┬╥┬┬┐ │║│║│││ │││││││ └┴┴┴┴┴┘
ssLsL
2L 3s⟨3/2⟩, also called saturnian, is a 3/2-equivalent (fifth-equivalent) moment of symmetry scale containing 2 large steps and 3 small steps, repeating every interval of 3/2 (702.0 ¢). Generators that produce this scale range from 280.8 ¢ to 351 ¢, or from 351 ¢ to 421.2 ¢. Due to its minor third generator, this scale has a wealth of diminished triads. Basic saturnian is in 7edf, an approximation of 12edo, which allows for playing regular music and saturnian music at the same time.
Intervals
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MOS degrees is deprecated. Please use Template:MOS tunings instead. |
Scale degree | 7edf (Basic, L:s = 2:1) | 9edf (Hard, L:s = 3:1) | 12edf (Soft, L:s = 3:2) | Approx. JI Ratios | |||
---|---|---|---|---|---|---|---|
Steps | Cents | Steps | Cents | Steps | Cents | ||
Perfect 0-mosdegree (unison) | 0 | 0 | 0 | 0 | 0 | 0 | 1/1 (exact) |
Minor 1-mosdegree | 1 | 100.3 | 1 | 78 | 2 | 117 | |
Major 1-mosdegree | 2 | 200.6 | 3 | 234 | 3 | 175.5 | |
Diminished 2-mosdegree | 2 | 200.6 | 2 | 156 | 4 | 234 | |
Perfect 2-mosdegree | 3 | 300.8 | 4 | 312 | 5 | 292.5 | |
Perfect 3-mosdegree | 4 | 401.1 | 5 | 390 | 7 | 409.5 | |
Augmented 3-mosdegree | 5 | 501.4 | 7 | 546 | 8 | 468 | |
Minor 4-mosdegree | 5 | 501.4 | 6 | 468 | 9 | 526.5 | |
Major 4-mosdegree | 6 | 601.7 | 8 | 624 | 10 | 585 | |
Perfect 5-mosdegree (equave) | 7 | 702 | 9 | 702 | 12 | 702 | 3/2 (exact) |
Genchain
-4 | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 |
d2ms | m4ms | m1ms | P3ms | P0ms | P2ms | M4ms | M1ms | A3ms |
Theory
2L 3s⟨3/2⟩ can be interpreted as the nonoctave regular temperament named pythium by User:CompactStar, tempering out 81/80 in the 3/2.4.5 subgroup. This is the simplest 3/2-equivalent temperament not containing octaves. Because the 3/2-reduced 5th harmonic of 40/27 is conflated with the just perfect fifth, the CTE generator of this temperament is exactly the 32/27 Pythagorean minor third. Although the most accurate tunings use near-32/27 generators, pythium can be tuned with minor thirds as high as that of 11edf's (319 cents).
Modes
UDP | Cyclic order |
Step pattern |
---|---|---|
4|0 | 1 | LsLss |
3|1 | 3 | LssLs |
2|2 | 5 | sLsLs |
1|3 | 2 | sLssL |
0|4 | 4 | ssLsL |