Pentacircle clan: Difference between revisions
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{{Main| Parapyth }} | {{Main| Parapyth }} | ||
Parapyth, by the original definition, is the 2.3.7.11.13 | Parapyth, by the original definition, is the [[2.3.7.11.13 subgroup|2.3.7.11.13-subgroup]] temperament tempering out [[352/351]] and [[364/363]]. We begin by looking at the [[2.3.7.11 subgroup|2.3.7.11]] [[restriction]] thereof. | ||
[[Subgroup]]: 2.3.7.11 | [[Subgroup]]: 2.3.7.11 | ||
| Line 13: | Line 13: | ||
[[Comma list]]: 896/891 | [[Comma list]]: 896/891 | ||
{{ | {{Mapping|legend=2| 1 0 0 7 | 0 1 0 -4 | 0 0 1 1 }} | ||
: mapping generators: ~2, ~3, ~7 | |||
: | |||
[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
* [[CTE]]: ~2 = 1200.000, ~3/2 = 703.576, ~7/4 = 967.554 | * [[CTE]]: ~2 = 1200.000{{c}}, ~3/2 = 703.576{{c}}, ~7/4 = 967.554{{c}} | ||
: [[error map]]: {{val| 0.000 +1.621 -1.272 +1.937 }} | : [[error map]]: {{val| 0.000 +1.621 -1.272 +1.937 }} | ||
* [[POTE]]: ~2 = 1200.000, ~3/2 = 703.834, ~7/4 = 969.872 | * [[POTE]]: ~2 = 1200.000{{c}}, ~3/2 = 703.834{{c}}, ~7/4 = 969.872{{c}} | ||
: error map: {{val| 0.000 +1.879 +1.046 +3.216 }} | : error map: {{val| 0.000 +1.879 +1.046 +3.216 }} | ||
| Line 29: | Line 28: | ||
=== Overview to extensions === | === Overview to extensions === | ||
==== Subgroup extensions ==== | ==== Subgroup extensions ==== | ||
By tempering out 896/891, we have mapped 14/11 to the major third, suggesting a slightly sharp fifth. This makes the minor third very close to the flat-of-Pythagorean [[13/11]], and extending the temperament to include harmonic 13 this way implies we temper out [[352/351]]. In fact, 896/891 = (352/351)([[364/363]]), so it is a very natural interpretation, giving rise to the 2.3.7.11.13 subgroup temperament shown below. | By tempering out 896/891, we have mapped 14/11 to the major third, suggesting a slightly sharp fifth. This makes the minor third very close to the flat-of-Pythagorean [[13/11]], and extending the temperament to include harmonic 13 this way implies we temper out [[352/351]]. In fact, 896/891 = (352/351)⋅([[364/363]]), so it is a very natural interpretation, giving rise to the 2.3.7.11.13 subgroup temperament shown below. | ||
==== Full 11-limit extensions ==== | ==== Full 11-limit extensions ==== | ||
| Line 36: | Line 35: | ||
Pele adds [[441/440]] and finds the harmonic 5 by equating the [[81/80|syntonic comma (81/80)]] with the [[64/63|septimal comma (64/63)]]. Together with the slightly sharp fifth this extension makes for one of the most natural interpretations. Sensamagic adds [[245/243]] or [[385/384]], a traditional RTT favorite. Apollo adds [[100/99]] or [[225/224]], and is even simpler than sensamagic. Pentafrost adds [[245/242]]. Uni adds [[540/539]]. Melpomene adds [[56/55]] or [[81/80]]. Terrapyth adds 585640/583443, a complex entry that finds the harmonic 5 at the triple augmented unison (AAA1). These all have the same lattice structure as parapyth. | Pele adds [[441/440]] and finds the harmonic 5 by equating the [[81/80|syntonic comma (81/80)]] with the [[64/63|septimal comma (64/63)]]. Together with the slightly sharp fifth this extension makes for one of the most natural interpretations. Sensamagic adds [[245/243]] or [[385/384]], a traditional RTT favorite. Apollo adds [[100/99]] or [[225/224]], and is even simpler than sensamagic. Pentafrost adds [[245/242]]. Uni adds [[540/539]]. Melpomene adds [[56/55]] or [[81/80]]. Terrapyth adds 585640/583443, a complex entry that finds the harmonic 5 at the triple augmented unison (AAA1). These all have the same lattice structure as parapyth. | ||
Varda adds [[176/175]], splitting the octave into two. Parahemif adds [[243/242]], splitting the perfect fifth into two. Kujuku adds 14700/14641, splitting the perfect twelfth into two. Tolerant adds 2200/2187, splitting the ~33/32 into two. Finally, canta adds 472392/471625, splitting the ~14/9 into three. | |||
Temperaments discussed elsewhere are: | Temperaments discussed elsewhere are: | ||
| Line 57: | Line 56: | ||
Comma list: 352/351, 364/363 | Comma list: 352/351, 364/363 | ||
Subgroup-val mapping: {{mapping| 1 0 0 7 12 | 0 1 0 -4 -7 | 0 0 1 1 1 }} | |||
Optimal tunings: | Optimal tunings: | ||
* CTE: ~2 = 1200.000, ~3/2 = 703.786, ~7/4 = 967.665 | * CTE: ~2 = 1200.000{{c}}, ~3/2 = 703.786{{c}}, ~7/4 = 967.665{{c}} | ||
* POTE: ~2 = 1200.000, ~3/2 = 703.856, ~7/4 = 969.907 | * POTE: ~2 = 1200.000{{c}}, ~3/2 = 703.856{{c}}, ~7/4 = 969.907{{c}} | ||
{{Optimal ET sequence|legend=0| 12f, 17, 41, 46, 58, 87, 104, 266ef, 329bef, 370beef, 474beef, 595bdeeeff, 699bbdeeeff }} | |||
Badness (Sintel): 0.266 | Badness (Sintel): 0.266 | ||
| Line 75: | Line 74: | ||
Optimal tunings: | Optimal tunings: | ||
* CTE: ~2 = 1200.000, ~3/2 = 703.978, ~7/4 = 968.399 | * CTE: ~2 = 1200.000{{c}}, ~3/2 = 703.978{{c}}, ~7/4 = 968.399{{c}} | ||
* POTE: ~2 = 1200.000, ~3/2 = 704.032, ~7/4 = 970.605 | * POTE: ~2 = 1200.000{{c}}, ~3/2 = 704.032{{c}}, ~7/4 = 970.605{{c}} | ||
{{Optimal ET sequence|legend=0| 12f, 17g, 29g, 41g, 46, 58, 75e, 104, 121, 225e }} | |||
Badness (Sintel): 0.536 | Badness (Sintel): 0.536 | ||
== Terrapyth == | == Terrapyth == | ||
Terrapyth tempers out the leapday comma, and can be described as 29 & 46 & 121. | Terrapyth tempers out the leapday comma, and can be described as {{nowrap| 29 & 46 & 121 }}. | ||
[[Subgroup]]: 2.3.5.7.11 | [[Subgroup]]: 2.3.5.7.11 | ||
| Line 89: | Line 88: | ||
[[Comma list]]: 896/891, 585640/583443 | [[Comma list]]: 896/891, 585640/583443 | ||
{{Mapping|legend=1| 1 0 -31 0 7 | 0 1 21 0 -4 | 0 0 0 1 1 }} | |||
: mapping generators: ~2, ~3, ~7 | : mapping generators: ~2, ~3, ~7 | ||
[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
* [[CTE]]: ~2 = 1200.000, ~3/2 = 704.102, ~7/4 = 968.390 | * [[CTE]]: ~2 = 1200.000{{c}}, ~3/2 = 704.102{{c}}, ~7/4 = 968.390{{c}} | ||
: [[error map]]: {{val| 0.000 +2.147 -0.163 -0.436 +0.662 }} | : [[error map]]: {{val| 0.000 +2.147 -0.163 -0.436 +0.662 }} | ||
* [[POTE]]: ~2 = 1200.000, ~3/2 = 704.181, ~7/4 = 970.622 | * [[POTE]]: ~2 = 1200.000{{c}}, ~3/2 = 704.181{{c}}, ~7/4 = 970.622{{c}} | ||
: error map: {{val| 0.000 +2.226 +1.496 +1.796 +2.578 }} | : error map: {{val| 0.000 +2.226 +1.496 +1.796 +2.578 }} | ||
{{Optimal ET sequence|legend=1| 17c, 29, 46, 92de, 121, 167, 288be }} | {{Optimal ET sequence|legend=1| 17c, 29, 46, 92de, 121, 167, 288be }} | ||
[[Badness]] (Sintel): 6. | [[Badness]] (Sintel): 6.43 | ||
=== 13-limit === | === 13-limit === | ||
| Line 111: | Line 109: | ||
Optimal tunings: | Optimal tunings: | ||
* CTE: ~2 = 1200.000, ~3/2 = 704.099, ~7/4 = 968.601 | * CTE: ~2 = 1200.000{{c}}, ~3/2 = 704.099{{c}}, ~7/4 = 968.601{{c}} | ||
* POTE: ~2 = 1200.000, ~3/2 = 704.169, ~7/4 = 970.843 | * POTE: ~2 = 1200.000{{c}}, ~3/2 = 704.169{{c}}, ~7/4 = 970.843{{c}} | ||
{{Optimal ET sequence|legend=0| 17c, 29, 46, 75e, 92def, 121, 167, 288be }} | |||
Badness (Sintel): 2. | Badness (Sintel): 2.32 | ||
=== 17-limit === | === 17-limit === | ||
| Line 126: | Line 124: | ||
Optimal tunings: | Optimal tunings: | ||
* CTE: ~2 = 1200.000, ~3/2 = 704.096, ~7/4 = 968.504 | * CTE: ~2 = 1200.000{{c}}, ~3/2 = 704.096{{c}}, ~7/4 = 968.504{{c}} | ||
* POTE: ~2 = 1200.000, ~3/2 = 704.163, ~7/4 = 970.662 | * POTE: ~2 = 1200.000{{c}}, ~3/2 = 704.163{{c}}, ~7/4 = 970.662{{c}} | ||
{{Optimal ET sequence|legend=0| 17cg, 29g, 46, 75e, 92defg, 121, 167, 288beg }} | |||
Badness (Sintel): 1. | Badness (Sintel): 1.45 | ||
== Pentafrost == | == Pentafrost == | ||
| Line 141: | Line 139: | ||
{{Mapping|legend=1| 1 0 15 0 7 | 0 1 -8 0 -4 | 0 0 0 1 1 }} | {{Mapping|legend=1| 1 0 15 0 7 | 0 1 -8 0 -4 | 0 0 0 1 1 }} | ||
: mapping generators: ~2, ~3, ~7 | : mapping generators: ~2, ~3, ~7 | ||
[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
* [[CTE]]: ~2 = 1200.000, ~3/2 = 701.883, ~7/4 = 964.864 | * [[CTE]]: ~2 = 1200.000{{c}}, ~3/2 = 701.883{{c}}, ~7/4 = 964.864{{c}} | ||
: [[error map]]: {{val| 0.000 -0.072 -1.375 -3.962 +6.016 }} | : [[error map]]: {{val| 0.000 -0.072 -1.375 -3.962 +6.016 }} | ||
* [[CWE]]: ~2 = 1200.000, ~3/2 = 701.903, ~7/4 = 964.614 | * [[CWE]]: ~2 = 1200.000{{c}}, ~3/2 = 701.903{{c}}, ~7/4 = 964.614{{c}} | ||
: error map: {{val| 0.000 -0.052 -1.541 -4.212 +5.683 }} | : error map: {{val| 0.000 -0.052 -1.541 -4.212 +5.683 }} | ||
* [[CEE]]: ~2 = 1200.000, ~3/2 = 702.006, ~7/4 = 964.085 | * [[CEE]]: ~2 = 1200.000{{c}}, ~3/2 = 702.006{{c}}, ~7/4 = 964.085{{c}} | ||
: error map: {{val| 0.000 +0.051 -2.364 -4.741 +4.741 }} | : error map: {{val| 0.000 +0.051 -2.364 -4.741 +4.741 }} | ||
{{Optimal ET sequence|legend=1| 12, 24, 29, 36, 41, 106d }} | {{Optimal ET sequence|legend=1| 12, 24, 29, 36, 41, 106d }} | ||
[[Badness]] (Sintel): 1. | [[Badness]] (Sintel): 1.90 | ||
=== 13-limit === | === 13-limit === | ||
| Line 162: | Line 159: | ||
Mapping: {{mapping| 1 0 15 0 7 12 | 0 1 -8 0 -4 -7 | 0 0 0 1 1 1 }} | Mapping: {{mapping| 1 0 15 0 7 12 | 0 1 -8 0 -4 -7 | 0 0 0 1 1 1 }} | ||
: mapping generators: ~2, ~3, ~7 | : mapping generators: ~2, ~3, ~7 | ||
Optimal tunings: | Optimal tunings: | ||
* CTE: ~2 = 1200.000, ~3/2 = 702.106, ~7/4 = 962.655 | * CTE: ~2 = 1200.000{{c}}, ~3/2 = 702.106{{c}}, ~7/4 = 962.655{{c}} | ||
* CWE: ~2 = 1200.000, ~3/2 = 702.145, ~7/4 = 962.175 | * CWE: ~2 = 1200.000{{c}}, ~3/2 = 702.145{{c}}, ~7/4 = 962.175{{c}} | ||
* CEE: ~2 = 1200.000, ~3/2 = 702.360, ~7/4 = 962.210 | * CEE: ~2 = 1200.000{{c}}, ~3/2 = 702.360{{c}}, ~7/4 = 962.210{{c}} | ||
{{Optimal ET sequence|legend=0| 12f, 24, 29, 41 }} | |||
Badness (Sintel): 1. | Badness (Sintel): 1.49 | ||
=== Permafrost === | === Permafrost === | ||
| Line 180: | Line 176: | ||
Mapping: {{mapping| 1 0 15 0 7 -3 | 0 1 -8 0 -4 6 | 0 0 0 1 1 -1 }} | Mapping: {{mapping| 1 0 15 0 7 -3 | 0 1 -8 0 -4 6 | 0 0 0 1 1 -1 }} | ||
: mapping generators: ~2, ~3, ~7 | : mapping generators: ~2, ~3, ~7 | ||
Optimal tunings: | Optimal tunings: | ||
* CTE: 2 = 1200.000, ~3/2 = 701.783, ~7/4 = 966.113 | * CTE: 2 = 1200.000{{c}}, ~3/2 = 701.783{{c}}, ~7/4 = 966.113{{c}} | ||
* CWE: 2 = 1200.000, ~3/2 = 701.753, ~7/4 = 966.445 | * CWE: 2 = 1200.000{{c}}, ~3/2 = 701.753{{c}}, ~7/4 = 966.445{{c}} | ||
* CEE: 2 = 1200.000, ~3/2 = 701.770, ~7/4 = 965.771 | * CEE: 2 = 1200.000{{c}}, ~3/2 = 701.770{{c}}, ~7/4 = 965.771{{c}} | ||
{{Optimal ET sequence|legend=0| 12, 17, 24, 36, 41, 77e }} | |||
Badness (Sintel): 2. | Badness (Sintel): 2.45 | ||
== Tolerant == | == Tolerant == | ||
: ''For the 7-limit version | : ''For the 7-limit version, see [[Miscellaneous 7-limit temperaments #Tolerant]].'' | ||
[[Subgroup]]: 2.3.5.7.11 | [[Subgroup]]: 2.3.5.7.11 | ||
| Line 200: | Line 195: | ||
{{Mapping|legend=1| 1 0 0 -10 -3 | 0 1 0 11 7 | 0 0 1 -2 -2 }} | {{Mapping|legend=1| 1 0 0 -10 -3 | 0 1 0 11 7 | 0 0 1 -2 -2 }} | ||
: mapping generators: ~2, ~3, ~5 | : mapping generators: ~2, ~3, ~5 | ||
[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
* [[CTE]]: ~2 = 1200.000, ~3/2 = 703.642, ~5/4 = 386.223 | * [[CTE]]: ~2 = 1200.000{{c}}, ~3/2 = 703.642{{c}}, ~5/4 = 386.223{{c}} | ||
: [[error map]]: {{val| 0.000 +1.687 -0.091 -1.207 +1.732 }} | : [[error map]]: {{val| 0.000 +1.687 -0.091 -1.207 +1.732 }} | ||
* [[POTE]]: ~2 = 1200.000, ~3/2 = 704.041, ~5/4 = 387.293 | * [[POTE]]: ~2 = 1200.000{{c}}, ~3/2 = 704.041{{c}}, ~5/4 = 387.293{{c}} | ||
: error map: {{val| 0.000 +2.086 +0.979 +1.042 +2.385 }} | : error map: {{val| 0.000 +2.086 +0.979 +1.042 +2.385 }} | ||
{{Optimal ET sequence|legend=1| 34d, 39d, 41, 80, 87, 121, 167, 208, 288be, 375be }} | {{Optimal ET sequence|legend=1| 34d, 39d, 41, 80, 87, 121, 167, 208, 288be, 375be }} | ||
[[Badness]] (Sintel): 1. | [[Badness]] (Sintel): 1.25 | ||
=== 13-limit === | === 13-limit === | ||
| Line 221: | Line 215: | ||
Optimal tunings: | Optimal tunings: | ||
* CTE: ~2 = 1200.000, ~3/2 = 703.705, ~5/4 = 386.616 | * CTE: ~2 = 1200.000{{c}}, ~3/2 = 703.705{{c}}, ~5/4 = 386.616{{c}} | ||
* POTE: ~2 = 1200.000, ~3/2 = 703.961, ~5/4 = 386.983 | * POTE: ~2 = 1200.000{{c}}, ~3/2 = 703.961{{c}}, ~5/4 = 386.983{{c}} | ||
{{Optimal ET sequence|legend=0| 34d, 41, 46, 75e, 80, 87, 121, 167, 208, 375be }} | |||
Badness (Sintel): 0.955 | Badness (Sintel): 0.955 | ||
| Line 236: | Line 230: | ||
Optimal tunings: | Optimal tunings: | ||
* CTE: ~2 = 1200.000, ~3/2 = 703.891, ~5/4 = 387.424 | * CTE: ~2 = 1200.000{{c}}, ~3/2 = 703.891{{c}}, ~5/4 = 387.424{{c}} | ||
* POTE: ~2 = 1200.000, ~3/2 = 704.083, ~5/4 = 387.327 | * POTE: ~2 = 1200.000{{c}}, ~3/2 = 704.083{{c}}, ~5/4 = 387.327{{c}} | ||
{{Optimal ET sequence|legend=0| 34d, 41, 46, 75e, 80, 87, 121, 167, 288beg, 496bdeefggg }} | |||
Badness (Sintel): 0.934 | Badness (Sintel): 0.934 | ||
| Line 251: | Line 245: | ||
{{Mapping|legend=1| 1 0 0 -13 -6 | 0 2 0 17 9 | 0 0 1 1 1 }} | {{Mapping|legend=1| 1 0 0 -13 -6 | 0 2 0 17 9 | 0 0 1 1 1 }} | ||
: mapping generators: ~2, ~121/70, ~5 | : mapping generators: ~2, ~121/70, ~5 | ||
[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
* [[CTE]]: ~2 = 1200.000, ~121/70 = 951.837, ~5/4 = 386.405 | * [[CTE]]: ~2 = 1200.000{{c}}, ~121/70 = 951.837{{c}}, ~5/4 = 386.405{{c}} | ||
: [[error map]]: {{val| 0.000 +1.718 +0.091 -1.198 +1.617 }} | : [[error map]]: {{val| 0.000 +1.718 +0.091 -1.198 +1.617 }} | ||
* [[CWE]]: ~2 = 1200.000, ~121/70 = 951.871, ~5/4 = 387.243 | * [[CWE]]: ~2 = 1200.000{{c}}, ~121/70 = 951.871{{c}}, ~5/4 = 387.243{{c}} | ||
: error map: {{val| 0.000 +1.787 +0.930 +0.220 +2.762 }} | : error map: {{val| 0.000 +1.787 +0.930 +0.220 +2.762 }} | ||
{{Optimal ET sequence|legend=1| 24, 29, 34d, 53d, 58, 87, 121, 145, 179e, 208, 266e }} | {{Optimal ET sequence|legend=1| 24, 29, 34d, 53d, 58, 87, 121, 145, 179e, 208, 266e }} | ||
[[Badness]] (Sintel): 2. | [[Badness]] (Sintel): 2.72 | ||
=== 13-limit === | === 13-limit === | ||
| Line 272: | Line 265: | ||
Optimal tunings: | Optimal tunings: | ||
* CTE: ~2 = 1200.000, ~26/15 = 951.852, ~5/4 = 386.089 | * CTE: ~2 = 1200.000{{c}}, ~26/15 = 951.852{{c}}, ~5/4 = 386.089{{c}} | ||
* CWE: ~2 = 1200.000, ~26/15 = 951.881, ~5/4 = 387.104 | * CWE: ~2 = 1200.000{{c}}, ~26/15 = 951.881{{c}}, ~5/4 = 387.104{{c}} | ||
{{Optimal ET sequence|legend=0| 24, 29, 34d, 53d, 58, 87, 121, 179ef, 208, 266ef, 474beef }} | |||
Badness (Sintel): 0.991 | Badness (Sintel): 0.991 | ||
| Line 289: | Line 282: | ||
Optimal tunings: | Optimal tunings: | ||
* CTE: ~2 = 1200.000, ~26/15 = 951.802, ~5/4 = 386.991 | * CTE: ~2 = 1200.000{{c}}, ~26/15 = 951.802{{c}}, ~5/4 = 386.991{{c}} | ||
* CWE: ~2 = 1200.000, ~26/15 = 951.879, ~5/4 = 387.723 | * CWE: ~2 = 1200.000{{c}}, ~26/15 = 951.879{{c}}, ~5/4 = 387.723{{c}} | ||
{{Optimal ET sequence|legend=0| 24, 34d, 58, 87, 121, 179ef, 208g, 266efg }} | |||
Badness (Sintel): 1. | Badness (Sintel): 1.18 | ||
== Trienparapyth == | == Trienparapyth == | ||
Trienparapyth can be described as the no-17's 23-limit 80 & 87 & 109 temperament. It splits the ~4/3 generator of [[#Parapythic|parapythic]] into three ~[[11/10]]'s by tempering out [[4000/3993|4000/3993 = S10/S11]] in the 11-limit and it interprets (11/10)<sup>2</sup> accurately as [[23/19]] in its full subgroup, tempering out [[2300/2299|2300/2299 = S20/S22]], or optionally less accurately as ~[[17/14]], though because this mapping only really makes much sense in [[80edo]] it is not included here; however, its connection to parapyth structure comes from later in the generator chain; specifically, from (11/10)<sup>7</sup> onwards. We may simplify (11/10)<sup>7</sup> as [[16/9|(4/3)<sup>2</sup>]]([[11/10]]) = [[88/45]], the octave-complement of [[45/44]]. Notice that parapythic wants a slightly flat ~4/3 corresponding to an 11/10 being tuned anywhere from around just (in an extremely sharp-for-parapyth tuning) to a little less than 1-cent sharp, a very narrow tuning range; therefore 88/45 is flattened so that 2/(11/10)<sup>7</sup>~45/44 is sharpened so that we can equate it with [[40/39]], tempering out (40/39)/(45/44) = [[352/351]], and because we know we want prime 19 later on, we equate this with [[39/38]] by tempering out the pinkanberry, [[1521/1520|1521/1520 = S39]]. Next, for eight generator steps, observe that (11/10)<sup>9</sup>/(11/10)/2 = (4/3)<sup>3</sup>/(11/10)/2 = ([[32/27]])/(11/10) = 320/297 is sharp of [[15/14]] by [[896/891]], which is reasonable to equate it with because in an optimal tuning 11/10 will be very slightly sharp so that the interval of eight generator steps is eight times as sharp. Thus, tempering out [[896/891]] and [[4000/3993]] defines trienparapyth in the 11-limit, which also tempers out [[3388/3375]], the 13-limit adds [[352/351]], the no-17's 19-limit equates 40/39 with 39/38 and the no-17's 23-limit equates 23/19 with (11/10)<sup>2</sup> as already mentioned. | Trienparapyth can be described as the no-17's 23-limit {{nowrap| 80 & 87 & 109 }} temperament. It splits the ~4/3 generator of [[#Parapythic|parapythic]] into three ~[[11/10]]'s by tempering out [[4000/3993|4000/3993 = S10/S11]] in the 11-limit and it interprets (11/10)<sup>2</sup> accurately as [[23/19]] in its full subgroup, tempering out [[2300/2299|2300/2299 = S20/S22]], or optionally less accurately as ~[[17/14]], though because this mapping only really makes much sense in [[80edo]] it is not included here; however, its connection to parapyth structure comes from later in the generator chain; specifically, from (11/10)<sup>7</sup> onwards. We may simplify (11/10)<sup>7</sup> as [[16/9|(4/3)<sup>2</sup>]]([[11/10]]) = [[88/45]], the octave-complement of [[45/44]]. Notice that parapythic wants a slightly flat ~4/3 corresponding to an 11/10 being tuned anywhere from around just (in an extremely sharp-for-parapyth tuning) to a little less than 1-cent sharp, a very narrow tuning range; therefore 88/45 is flattened so that 2/(11/10)<sup>7</sup>~45/44 is sharpened so that we can equate it with [[40/39]], tempering out (40/39)/(45/44) = [[352/351]], and because we know we want prime 19 later on, we equate this with [[39/38]] by tempering out the pinkanberry, [[1521/1520|1521/1520 = S39]]. Next, for eight generator steps, observe that (11/10)<sup>9</sup>/(11/10)/2 = (4/3)<sup>3</sup>/(11/10)/2 = ([[32/27]])/(11/10) = 320/297 is sharp of [[15/14]] by [[896/891]], which is reasonable to equate it with because in an optimal tuning 11/10 will be very slightly sharp so that the interval of eight generator steps is eight times as sharp. Thus, tempering out [[896/891]] and [[4000/3993]] defines trienparapyth in the 11-limit, which also tempers out [[3388/3375]], the 13-limit adds [[352/351]], the no-17's 19-limit equates 40/39 with 39/38 and the no-17's 23-limit equates 23/19 with (11/10)<sup>2</sup> as already mentioned. | ||
Structurally, trienparapyth is three copies of parapyth with the independent generator of 7 connected to an equivalent independent generator for 5 through the ~[[15/7]] reached at (11/10)<sup>8</sup> so that ~[[20/7]] is reached at (11/10)<sup>11</sup>, and this is how the last generator can be either 5 or 7. | Structurally, trienparapyth is three copies of parapyth with the independent generator of 7 connected to an equivalent independent generator for 5 through the ~[[15/7]] reached at (11/10)<sup>8</sup> so that ~[[20/7]] is reached at (11/10)<sup>11</sup>, and this is how the last generator can be either 5 or 7. | ||
| Line 303: | Line 296: | ||
[[Subgroup]]: 2.3.5.7.11 | [[Subgroup]]: 2.3.5.7.11 | ||
[[Comma list]]: | [[Comma list]]: 896/891, 3388/3375 | ||
{{Mapping|legend=1| 1 2 0 2 1 | 0 -3 0 -11 1 | 0 0 1 1 1 }} | {{Mapping|legend=1| 1 2 0 2 1 | 0 -3 0 -11 1 | 0 0 1 1 1 }} | ||
: mapping generators: ~2, ~11/10, ~5 | : mapping generators: ~2, ~11/10, ~5 | ||
[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
* [[CTE]]: ~2 = 1200.000, ~11/10 = 165.413, ~5/4 = 386.887 | * [[CTE]]: ~2 = 1200.000{{c}}, ~11/10 = 165.413{{c}}, ~5/4 = 386.887{{c}} | ||
: [[error map]]: {{val| 0.000 +1.805 +0.574 -1.486 +0.983 }} | : [[error map]]: {{val| 0.000 +1.805 +0.574 -1.486 +0.983 }} | ||
* [[CWE]]: ~2 = 1200.000, ~11/10 = 165.359, ~5/4 = 387.809 | * [[CWE]]: ~2 = 1200.000{{c}}, ~11/10 = 165.359{{c}}, ~5/4 = 387.809{{c}} | ||
: error map: {{val| 0.000 +1.967 +1.496 +0.031 +1.851 }} | : error map: {{val| 0.000 +1.967 +1.496 +0.031 +1.851 }} | ||
{{Optimal ET sequence|legend=1| 7d, 14e, 15d, 22, 51, 58, 80, 87, 145, 167, 312ce, 479bce }} | {{Optimal ET sequence|legend=1| 7d, 14e, 15d, 22, 51, 58, 80, 87, 145, 167, 312ce, 479bce }} | ||
[[Badness]] (Sintel): 1. | [[Badness]] (Sintel): 1.52 | ||
=== 13-limit === | === 13-limit === | ||
Subgroup: 2.3.5.7.11.13 | Subgroup: 2.3.5.7.11.13 | ||
Comma list: | Comma list: 352/351, 364/363, 1001/1000 | ||
Mapping: {{mapping| 1 2 0 2 1 0 | 0 -3 0 -11 1 10 | 0 0 1 1 1 1 }} | Mapping: {{mapping| 1 2 0 2 1 0 | 0 -3 0 -11 1 10 | 0 0 1 1 1 1 }} | ||
: mapping generators: ~2, ~11/10, ~5 | : mapping generators: ~2, ~11/10, ~5 | ||
Optimal tunings: | Optimal tunings: | ||
* CTE: ~2 = 1200.000, ~11/10 = 165.398, ~5/4 = 386.791 | * CTE: ~2 = 1200.000{{c}}, ~11/10 = 165.398{{c}}, ~5/4 = 386.791{{c}} | ||
* CWE: ~2 = 1200.000, ~11/10 = 165.380, ~5/4 = 387.876 | * CWE: ~2 = 1200.000{{c}}, ~11/10 = 165.380{{c}}, ~5/4 = 387.876{{c}} | ||
{{Optimal ET sequence|legend=0| 7d, 22, 29, 51f, 51cde, 58, 80, 87, 145, 167, 225ce, 254, 312ce }} | |||
Badness (Sintel): 1. | Badness (Sintel): 1.15 | ||
=== 2.3.5.7.11.13.19 subgroup === | === 2.3.5.7.11.13.19 subgroup === | ||
| Line 341: | Line 332: | ||
Subgroup: 2.3.5.7.11.13.19 | Subgroup: 2.3.5.7.11.13.19 | ||
Comma list: | Comma list: 286/285, 352/351, 364/363, 400/399 | ||
Mapping: {{mapping| 1 2 0 2 1 0 0 | 0 -3 0 -11 1 10 14 | 0 0 1 1 1 1 1 }} | Mapping: {{mapping| 1 2 0 2 1 0 0 | 0 -3 0 -11 1 10 14 | 0 0 1 1 1 1 1 }} | ||
: mapping generators: ~2, ~11/10, ~5 | : mapping generators: ~2, ~11/10, ~5 | ||
Optimal tunings: | Optimal tunings: | ||
* CTE: ~2 = 1200.000, ~11/10 = 165.299, ~5/4 = 386.315 | * CTE: ~2 = 1200.000{{c}}, ~11/10 = 165.299{{c}}, ~5/4 = 386.315{{c}} | ||
* CWE: ~2 = 1200.000, ~11/10 = 165.298, ~5/4 = 387.745 | * CWE: ~2 = 1200.000{{c}}, ~11/10 = 165.298{{c}}, ~5/4 = 387.745{{c}} | ||
{{Optimal ET sequence|legend=0| 7d, 22, 29, 51fh, 51cde, 58h, 80, 87, 138cdeh, 167h }} | |||
Badness (Sintel): 1. | Badness (Sintel): 1.20 | ||
=== 2.3.5.7.11.13.19.23 subgroup === | === 2.3.5.7.11.13.19.23 subgroup === | ||
Subgroup: 2.3.5.7.11.13.19.23 | Subgroup: 2.3.5.7.11.13.19.23 | ||
Comma list: | Comma list: 208/207, 286/285, 352/351, 364/363, 400/399 | ||
Mapping: {{mapping| 1 2 0 2 1 0 0 0 | 0 -3 0 -11 1 10 14 16 | 0 0 1 1 1 1 1 1 }} | Mapping: {{mapping| 1 2 0 2 1 0 0 0 | 0 -3 0 -11 1 10 14 16 | 0 0 1 1 1 1 1 1 }} | ||
: mapping generators: ~2, ~11/10, ~5 | : mapping generators: ~2, ~11/10, ~5 | ||
Optimal tunings | Optimal tunings | ||
* CTE: ~2 = 1200.000, ~11/10 = 165.258, ~5/4 = 386.145 | * CTE: ~2 = 1200.000{{c}}, ~11/10 = 165.258{{c}}, ~5/4 = 386.145{{c}} | ||
* CWE: ~2 = 1200.000, ~11/10 = 165.268, ~5/4 = 387.724 | * CWE: ~2 = 1200.000{{c}}, ~11/10 = 165.268{{c}}, ~5/4 = 387.724{{c}} | ||
{{Optimal ET sequence|legend=0| 22i, 29, 51fhi, 51cde, 58hi, 80, 87, 109, 138cdehi, 167hi }} | |||
Badness (Sintel): 1. | Badness (Sintel): 1.14 | ||
[[Category:Temperament clans]] | [[Category:Temperament clans]] | ||