71edo: Difference between revisions
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{{EDO intro|71}} | {{EDO intro|71}} | ||
71edo | == Theory == | ||
71edo is a [[dual-fifth]] system, with the flat fifth (which is near the fifths of [[26edo]] and [[45edo]]) [[support]]ing [[flattone]] temperament, and the sharp fifth (which is near [[22edo]]'s fifth) supporting [[superpyth]]. Unlike small dual-fifth systems such as [[18edo]], both fifths are close approximations of 3/2. | |||
Using the [[patent val]], the equal temperament [[tempering out|tempers out]] 20480/19683 and [[393216/390625]] in the [[5-limit]], [[875/864]], [[1029/1024]] and [[4000/3969]] in the [[7-limit]], [[100/99]] and [[245/242]] in the [[11-limit]], and [[91/90]] in the [[13-limit]]. In the 13-limit it supplies the optimal [[patent val]] for the 29 & 71 and 34 & 37 temperaments. | |||
== | === Odd harmonics === | ||
{{Harmonics in equal|71}} | {{Harmonics in equal|71}} | ||
=== Subsets and supersets === | |||
71edo is the 20th [[prime edo]], following [[67edo]] and before [[73edo]]. [[142edo]], which doubles it, provides correction for the harmonic 3. | |||
== Intervals == | == Intervals == | ||
Revision as of 14:30, 7 July 2024
| ← 70edo | 71edo | 72edo → |
Theory
71edo is a dual-fifth system, with the flat fifth (which is near the fifths of 26edo and 45edo) supporting flattone temperament, and the sharp fifth (which is near 22edo's fifth) supporting superpyth. Unlike small dual-fifth systems such as 18edo, both fifths are close approximations of 3/2.
Using the patent val, the equal temperament tempers out 20480/19683 and 393216/390625 in the 5-limit, 875/864, 1029/1024 and 4000/3969 in the 7-limit, 100/99 and 245/242 in the 11-limit, and 91/90 in the 13-limit. In the 13-limit it supplies the optimal patent val for the 29 & 71 and 34 & 37 temperaments.
Odd harmonics
| Harmonic | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 17 | 19 | 21 | 23 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Error | Absolute (¢) | +7.90 | +2.42 | -5.45 | -1.09 | +6.43 | +4.54 | -6.58 | -3.55 | +6.71 | +2.46 | -2.92 |
| Relative (%) | +46.8 | +14.3 | -32.2 | -6.5 | +38.0 | +26.9 | -38.9 | -21.0 | +39.7 | +14.5 | -17.3 | |
| Steps (reduced) |
113 (42) |
165 (23) |
199 (57) |
225 (12) |
246 (33) |
263 (50) |
277 (64) |
290 (6) |
302 (18) |
312 (28) |
321 (37) | |
Subsets and supersets
71edo is the 20th prime edo, following 67edo and before 73edo. 142edo, which doubles it, provides correction for the harmonic 3.
Intervals
| Steps | Cents | Approximate ratios | Ups and downs notation (Dual flat fifth 41\71) |
Ups and downs notation (Dual sharp fifth 42\71) |
|---|---|---|---|---|
| 0 | 0 | 1/1 | D | D |
| 1 | 16.9 | ^D, vE♭♭♭ | ^D, vvE♭ | |
| 2 | 33.8 | vD♯, E♭♭♭ | ^^D, vE♭ | |
| 3 | 50.7 | 35/34 | D♯, ^E♭♭♭ | ^3D, E♭ |
| 4 | 67.6 | 25/24, 26/25 | ^D♯, vE♭♭ | ^4D, ^E♭ |
| 5 | 84.5 | 21/20 | vD𝄪, E♭♭ | ^5D, ^^E♭ |
| 6 | 101.4 | 17/16 | D𝄪, ^E♭♭ | v4D♯, ^3E♭ |
| 7 | 118.3 | 31/29 | ^D𝄪, vE♭ | v3D♯, ^4E♭ |
| 8 | 135.2 | 13/12 | vD♯𝄪, E♭ | vvD♯, v5E |
| 9 | 152.1 | 12/11, 35/32 | D♯𝄪, ^E♭ | vD♯, v4E |
| 10 | 169 | 32/29 | ^D♯𝄪, vE | D♯, v3E |
| 11 | 185.9 | 29/26 | E | ^D♯, vvE |
| 12 | 202.8 | ^E, vF♭♭ | ^^D♯, vE | |
| 13 | 219.7 | 25/22 | vE♯, F♭♭ | E |
| 14 | 236.6 | E♯, ^F♭♭ | ^E, vvF | |
| 15 | 253.5 | 22/19, 29/25, 37/32 | ^E♯, vF♭ | ^^E, vF |
| 16 | 270.4 | vE𝄪, F♭ | F | |
| 17 | 287.3 | 13/11 | E𝄪, ^F♭ | ^F, vvG♭ |
| 18 | 304.2 | 25/21, 31/26, 37/31 | ^E𝄪, vF | ^^F, vG♭ |
| 19 | 321.1 | F | ^3F, G♭ | |
| 20 | 338 | 17/14, 28/23 | ^F, vG♭♭♭ | ^4F, ^G♭ |
| 21 | 354.9 | vF♯, G♭♭♭ | ^5F, ^^G♭ | |
| 22 | 371.8 | 26/21, 31/25 | F♯, ^G♭♭♭ | v4F♯, ^3G♭ |
| 23 | 388.7 | 5/4 | ^F♯, vG♭♭ | v3F♯, ^4G♭ |
| 24 | 405.6 | 19/15, 24/19 | vF𝄪, G♭♭ | vvF♯, v5G |
| 25 | 422.5 | 37/29 | F𝄪, ^G♭♭ | vF♯, v4G |
| 26 | 439.4 | 31/24 | ^F𝄪, vG♭ | F♯, v3G |
| 27 | 456.3 | 13/10 | vF♯𝄪, G♭ | ^F♯, vvG |
| 28 | 473.2 | 21/16, 25/19 | F♯𝄪, ^G♭ | ^^F♯, vG |
| 29 | 490.1 | ^F♯𝄪, vG | G | |
| 30 | 507 | G | ^G, vvA♭ | |
| 31 | 523.9 | 23/17 | ^G, vA♭♭♭ | ^^G, vA♭ |
| 32 | 540.8 | 26/19 | vG♯, A♭♭♭ | ^3G, A♭ |
| 33 | 557.7 | 29/21 | G♯, ^A♭♭♭ | ^4G, ^A♭ |
| 34 | 574.6 | 32/23 | ^G♯, vA♭♭ | ^5G, ^^A♭ |
| 35 | 591.5 | 31/22 | vG𝄪, A♭♭ | v4G♯, ^3A♭ |
| 36 | 608.5 | 37/26 | G𝄪, ^A♭♭ | v3G♯, ^4A♭ |
| 37 | 625.4 | 23/16 | ^G𝄪, vA♭ | vvG♯, v5A |
| 38 | 642.3 | 29/20 | vG♯𝄪, A♭ | vG♯, v4A |
| 39 | 659.2 | 19/13 | G♯𝄪, ^A♭ | G♯, v3A |
| 40 | 676.1 | 31/21, 34/23, 37/25 | ^G♯𝄪, vA | ^G♯, vvA |
| 41 | 693 | A | ^^G♯, vA | |
| 42 | 709.9 | ^A, vB♭♭♭ | A | |
| 43 | 726.8 | 32/21, 35/23 | vA♯, B♭♭♭ | ^A, vvB♭ |
| 44 | 743.7 | 20/13 | A♯, ^B♭♭♭ | ^^A, vB♭ |
| 45 | 760.6 | 31/20 | ^A♯, vB♭♭ | ^3A, B♭ |
| 46 | 777.5 | vA𝄪, B♭♭ | ^4A, ^B♭ | |
| 47 | 794.4 | 19/12, 30/19 | A𝄪, ^B♭♭ | ^5A, ^^B♭ |
| 48 | 811.3 | 8/5 | ^A𝄪, vB♭ | v4A♯, ^3B♭ |
| 49 | 828.2 | 21/13 | vA♯𝄪, B♭ | v3A♯, ^4B♭ |
| 50 | 845.1 | 31/19 | A♯𝄪, ^B♭ | vvA♯, v5B |
| 51 | 862 | 23/14, 28/17 | ^A♯𝄪, vB | vA♯, v4B |
| 52 | 878.9 | B | A♯, v3B | |
| 53 | 895.8 | ^B, vC♭♭ | ^A♯, vvB | |
| 54 | 912.7 | 22/13 | vB♯, C♭♭ | ^^A♯, vB |
| 55 | 929.6 | B♯, ^C♭♭ | B | |
| 56 | 946.5 | 19/11 | ^B♯, vC♭ | ^B, vvC |
| 57 | 963.4 | vB𝄪, C♭ | ^^B, vC | |
| 58 | 980.3 | 37/21 | B𝄪, ^C♭ | C |
| 59 | 997.2 | ^B𝄪, vC | ^C, vvD♭ | |
| 60 | 1014.1 | C | ^^C, vD♭ | |
| 61 | 1031 | 29/16 | ^C, vD♭♭♭ | ^3C, D♭ |
| 62 | 1047.9 | 11/6 | vC♯, D♭♭♭ | ^4C, ^D♭ |
| 63 | 1064.8 | 24/13, 37/20 | C♯, ^D♭♭♭ | ^5C, ^^D♭ |
| 64 | 1081.7 | ^C♯, vD♭♭ | v4C♯, ^3D♭ | |
| 65 | 1098.6 | 32/17 | vC𝄪, D♭♭ | v3C♯, ^4D♭ |
| 66 | 1115.5 | C𝄪, ^D♭♭ | vvC♯, v5D | |
| 67 | 1132.4 | 25/13 | ^C𝄪, vD♭ | vC♯, v4D |
| 68 | 1149.3 | vC♯𝄪, D♭ | C♯, v3D | |
| 69 | 1166.2 | C♯𝄪, ^D♭ | ^C♯, vvD | |
| 70 | 1183.1 | ^C♯𝄪, vD | ^^C♯, vD | |
| 71 | 1200 | 2/1 | D | D |
Music
- Dancing in the Mosh Pit (2023)