2L 3s (3/2-equivalent): Difference between revisions
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== Notation == | == Notation == | ||
The main way of notating the saturnian scale is using a 3/2-repeating notation consisting of 5 naturals ( | The main way of notating the saturnian scale is using a 3/2-repeating notation consisting of 5 naturals (e.g. A-E for the 2|2 mode). | ||
=== Intervals === | === Intervals === | ||
{{MOS degrees|Step Ratio=2/1; 3/1; 3/2}} | {{MOS degrees|Step Ratio=2/1; 3/1; 3/2|Notation=ABCDE;#;b}} | ||
=== Genchain === | === Genchain === |
Revision as of 07:02, 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 contains 2 diminished triads. Basic saturnian is in 7edf, an approximation of 12edo, which allows for playing regular music and saturnian music at the same time.
Notation
The main way of notating the saturnian scale is using a 3/2-repeating notation consisting of 5 naturals (e.g. A-E for the 2|2 mode).
Intervals
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MOS degrees is deprecated. Please use Template:MOS tunings instead. |
Scale degree | On A | 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) | A | 0 | 0 | 0 | 0 | 0 | 0 | 1/1 (exact) |
Minor 1-mosdegree | B | 1 | 100.3 | 1 | 78 | 2 | 117 | |
Major 1-mosdegree | B# | 2 | 200.6 | 3 | 234 | 3 | 175.5 | |
Diminished 2-mosdegree | Cb | 2 | 200.6 | 2 | 156 | 4 | 234 | |
Perfect 2-mosdegree | C | 3 | 300.8 | 4 | 312 | 5 | 292.5 | |
Perfect 3-mosdegree | D | 4 | 401.1 | 5 | 390 | 7 | 409.5 | |
Augmented 3-mosdegree | D# | 5 | 501.4 | 7 | 546 | 8 | 468 | |
Minor 4-mosdegree | Eb | 5 | 501.4 | 6 | 468 | 9 | 526.5 | |
Major 4-mosdegree | E | 6 | 601.7 | 8 | 624 | 10 | 585 | |
Perfect 5-mosdegree (equave) | A | 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
The mode names are based on the 5 largest satellites of Saturn.
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 |