Pentacircle clan: Difference between revisions
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{{Technical data page}} | |||
The '''pentacircle clan''' of [[rank-3 temperament]]s tempers out the pentacircle comma, [[896/891]]. This has the effect of identifying [[14/11]] at the [[81/64|Pythagorean major third]]. | |||
For the rank-4 pentacircle temperament, see [[Rank-4 temperament #Pentacircle (896/891)]]. | |||
== Parapythic == | |||
{{Main| Parapyth }} | |||
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 | |||
[[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: | |||
* [[WE]]: ~2 = 1199.3774{{c}}, ~3/2 = 703.4693{{c}}, ~7/4 = 969.3690{{c}} | |||
: [[error map]]: {{val| -0.623 +0.892 -0.702 +1.061 }} | |||
* [[CWE]]: ~2 = 1200.000{{c}}, ~3/2 = 703.7426{{c}}, ~7/4 = 969.0476{{c}} | |||
: error map: {{val| 0.000 +1.788 +0.222 +2.759 }} | |||
{{Optimal ET sequence|legend=1| 12, 17, 36, 41, 58, 63, 104, 225e, 266e, 370bee, 699bbdeee }} | |||
[[Badness]] (Sintel): 0.299 | |||
[[ | === Overview to 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. | |||
== | ==== Full 11-limit extensions ==== | ||
The second comma in the comma list determines how we extend parapyth to include the harmonic 5. | |||
[[ | 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: | |||
* ''[[Melpomene]]'' → [[Didymus rank-3 family #Melpomene|Didymus rank-3 family]] | |||
* ''[[Apollo]]'' → [[Marvel family #Apollo|Marvel family]] | |||
* [[Sensamagic]] → [[Sensamagic family #Undecimal sensamagic|Sensamagic family]] | |||
* [[Pele]] → [[Hemifamity family #Pele|Hemifamity family]] | |||
* ''[[Uni]]'' → [[Hemimage family #Uni|Hemimage family]] | |||
* ''[[Varda]]'' → [[Diaschismic rank-3 family #Varda|Diaschismic rank-3 family]] | |||
* ''[[Parahemif]]'' → [[Rastmic rank-3 clan #Parahemif|Rastmic rank-3 clan]] | |||
* ''[[Canta]]'' → [[Canou family #Canta|Canou family]] | |||
Considered below are tolerant, kujuku, and terrapyth. | |||
=== Parapyth === | |||
{{Main| Parapyth }} | |||
Subgroup: 2.3.7.11.13 | Subgroup: 2.3.7.11.13 | ||
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: | |||
* WE: ~2 = 1199.3706{{c}}, ~3/2 = 703.4872{{c}}, ~7/4 = 969.3987{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~3/2 = 703.8328{{c}}, ~7/4 = 969.1612{{c}} | |||
{{ | {{Optimal ET sequence|legend=0| 12f, 17, 41, 46, 58, 87, 104, 266ef, 329bef, 370beef, 474beef, 595bdeeeff, 699bbdeeeff }} | ||
Badness (Sintel): 0.266 | |||
== | ==== Etypyth ==== | ||
=== 7-limit === | Subgroup: 2.3.7.11.13.17 | ||
Subgroup: 2.3.5.7 | |||
Comma list: 352/351, 364/363, 442/441 | |||
Subgroup-val mapping: {{mapping| 1 0 0 7 12 -13 | 0 1 0 -4 -7 9 | 0 0 1 1 1 1 }} | |||
Optimal tunings: | |||
* WE: ~2 = 1199.3607{{c}}, ~3/2 = 703.6564{{c}}, ~7/4 = 970.0880{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~3/2 = 704.0139{{c}}, ~7/4 = 969.8715{{c}} | |||
{{Optimal ET sequence|legend=0| 12f, 17g, 29g, 41g, 46, 58, 75e, 104, 121, 225e }} | |||
Badness (Sintel): 0.536 | |||
== Terrapyth == | |||
Terrapyth tempers out the leapday comma, and can be described as {{nowrap| 29 & 46 & 121 }}. | |||
[[Subgroup]]: 2.3.5.7.11 | |||
[[Comma list]]: 896/891, 585640/583443 | |||
{{Mapping|legend=1| 1 0 -31 0 7 | 0 1 21 0 -4 | 0 0 0 1 1 }} | |||
[[Optimal tuning]]s: | |||
* [[WE]]: ~2 = 1199.3126{{c}}, ~3/2 = 703.7780{{c}}, ~7/4 = 970.0657{{c}} | |||
: [[error map]]: {{val| -0.687 +1.136 -0.101 -0.135 +0.199 }} | |||
* [[CWE]]: ~2 = 1200.0000{{c}}, ~3/2 = 704.1544{{c}}, ~7/4 = 969.8575{{c}} | |||
: error map: {{val| 0.000 +2.199 +0.928 +1.032 +1.922 }} | |||
{{Optimal ET sequence|legend=1| 17c, 29, 46, 92de, 121, 167, 288be, 455bcde }} | |||
[[Badness]] (Sintel): 6.43 | |||
=== 13-limit === | |||
Subgroup: 2.3.5.7.11.13 | |||
Comma list: 352/351, 364/363, 9295/9261 | |||
Mapping: {{mapping| 1 0 -31 0 7 12 | 0 1 0 21 0 4 -7 | 0 0 0 1 1 1 }} | |||
Optimal tunings: | |||
* WE: ~2 = 1199.3695{{c}}, ~3/2 = 703.7992{{c}}, ~7/4 = 970.3331{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~3/2 = 704.1459{{c}}, ~7/4 = 970.0967{{c}} | |||
{{Optimal ET sequence|legend=0| 17c, 29, 46, 75e, 92def, 121, 167, 288be }} | |||
Badness (Sintel): 2.32 | |||
=== 17-limit === | |||
Subgroup: 2.3.5.7.11.13.17 | |||
Comma list: 352/351, 364/363, 442/441, 715/714 | |||
Mapping: {{mapping| 1 0 -31 0 7 12 -13 | 0 1 0 21 0 4 -7 9 | 0 0 0 1 1 1 1 1 }} | |||
Optimal tunings: | |||
* WE: ~2 = 1199.3783{{c}}, ~3/2 = 703.7980{{c}}, ~7/4 = 970.1592{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~3/2 = 704.1406{{c}}, ~7/4 = 969.9458{{c}} | |||
{{Optimal ET sequence|legend=0| 17cg, 29g, 46, 75e, 92defg, 121, 167, 288beg }} | |||
Badness (Sintel): 1.45 | |||
[[ | == Pentafrost == | ||
Pentafrost tempers out the [[245/242|frostma]] in addition to 896/891 which also means that the [[schisma]] is tempered out, mapping prime 5 to eight [[4/3|perfect fourths]] minus an octave. | |||
It was named by [[Tristan Bay]] in 2024 as a portmanteau of ''pentacircle'' and ''frost''. | |||
[[ | [[Subgroup]]: 2.3.5.7.11 | ||
[[Comma list]]: 245/242, 896/891 | |||
{{Mapping|legend=1| 1 0 15 0 7 | 0 1 -8 0 -4 | 0 0 0 1 1 }} | |||
[[Optimal tuning]]s: | |||
* [[WE]]: ~2 = 1200.1251{{c}}, ~3/2 = 701.9850{{c}}, ~7/4 = 964.6139{{c}} | |||
: [[error map]]: {{val| +0.125 +0.155 -1.318 -3.962 +5.982 }} | |||
* [[CWE]]: ~2 = 1200.0000{{c}}, ~3/2 = 701.9034{{c}}, ~7/4 = 964.6143{{c}} | |||
: error map: {{val| 0.000 -0.052 -1.541 -4.212 +5.683 }} | |||
{{Optimal ET sequence|legend=1| 12, 24, 29, 36, 41, 106d }} | |||
Badness: 1. | [[Badness]] (Sintel): 1.90 | ||
=== 13-limit === | |||
Subgroup: 2.3.5.7.11.13 | |||
Comma list: 105/104, 245/242, 352/351 | |||
Mapping: {{mapping| 1 0 15 0 7 12 | 0 1 -8 0 -4 -7 | 0 0 0 1 1 1 }} | |||
Optimal tunings: | |||
* WE: ~2 = 1200.2502{{c}}, ~3/2 = 702.3077{{c}}, ~7/4 = 962.1832{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~3/2 = 702.1455{{c}}, ~7/4 = 962.1748{{c}} | |||
{{Optimal ET sequence|legend=0| 12f, 24, 29, 41 }} | |||
Badness (Sintel): 1.49 | |||
=== Permafrost === | |||
Subgroup: 2.3.5.7.11.13 | |||
Comma list: 144/143, 245/242, 896/891 | |||
Mapping: {{mapping| 1 0 15 0 7 -3 | 0 1 -8 0 -4 6 | 0 0 0 1 1 -1 }} | |||
Optimal tunings: | |||
* WE: 2 = 1199.6241{{c}}, ~3/2 = 701.5280{{c}}, ~7/4 = 966.2056{{c}} | |||
* CWE: 2 = 1200.000{{c}}, ~3/2 = 701.7534{{c}}, ~7/4 = 966.4455{{c}} | |||
{{Optimal ET sequence|legend=0| 12, 17, 24, 36, 41, 77e }} | |||
Badness (Sintel): 2.45 | |||
== Tolerant == | |||
: ''For the 7-limit version, see [[Miscellaneous 7-limit temperaments #Tolerant]].'' | |||
[[Subgroup]]: 2.3.5.7.11 | |||
[[Comma list]]: 896/891, 2200/2187 | |||
{{Mapping|legend=1| 1 0 0 -10 -3 | 0 1 0 11 7 | 0 0 1 -2 -2 }} | |||
: mapping generators: ~2, ~3, ~5 | |||
[[Optimal tuning]]s: | |||
* [[WE]]: ~2 = 1199.4396{{c}}, ~3/2 = 703.7124{{c}}, ~5/4 = 387.1118{{c}} | |||
: [[error map]]: {{val| -0.560 +1.197 -0.323 -0.532 +0.445 }} | |||
* [[CWE]]: ~2 = 1200.0000{{c}}, ~3/2 = 703.9092{{c}}, ~5/4 = 386.9306{{c}} | |||
: error map: {{val| 0.000 +1.951 +0.617 +0.281 +2.164 }} | |||
{{Optimal ET sequence|legend=1| 34d, 39d, 41, 80, 87, 121, 167, 208, 288be, 375be }} | |||
[[Badness]] (Sintel): 1.25 | |||
=== 13-limit === | === 13-limit === | ||
| Line 74: | Line 206: | ||
Comma list: 325/324, 352/351, 364/363 | Comma list: 325/324, 352/351, 364/363 | ||
Mapping: | Mapping: {{mapping| 1 0 0 -10 -3 2 | 0 1 0 11 7 4 | 0 0 1 -2 -2 -2 }} | ||
Optimal tunings: | |||
* WE: ~2 = 1199.5161{{c}}, ~3/2 = 703.6767{{c}}, ~5/4 = 386.8270{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~3/2 = 703.8968{{c}}, ~5/4 = 386.8916{{c}} | |||
{{Optimal ET sequence|legend=0| 34d, 41, 46, 75e, 80, 87, 121, 167, 208, 375be }} | |||
Badness: | Badness (Sintel): 0.955 | ||
=== 17-limit === | === 17-limit === | ||
| Line 85: | Line 221: | ||
Comma list: 256/255, 325/324, 352/351, 364/363 | Comma list: 256/255, 325/324, 352/351, 364/363 | ||
Mapping: | Mapping: {{mapping| 1 0 0 -10 -3 2 8 | 0 1 0 11 7 4 -1 | 0 0 1 -2 -2 -2 -1 }} | ||
Optimal tunings: | |||
* WE: ~2 = 1199.3929{{c}}, ~3/2 = 703.7268{{c}}, ~5/4 = 387.1310{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~3/2 = 704.0472{{c}}, ~5/4 = 387.3450{{c}} | |||
{{Optimal ET sequence|legend=0| 34d, 41, 46, 75e, 80, 87, 121, 167, 288beg, 496bdeefggg }} | |||
Badness (Sintel): 0.934 | |||
== Kujuku == | |||
Kujuku splits the perfect twelfth into two. [[Scott Dakota]] has aliased this temperament ''SQPP'' (for ''semiquartal parapyth''). | |||
[[Subgroup]]: 2.3.5.7.11 | |||
[[Comma list]]: 896/891, 14700/14641 | |||
{{Mapping|legend=1| 1 0 0 -13 -6 | 0 2 0 17 9 | 0 0 1 1 1 }} | |||
: mapping generators: ~2, ~121/70, ~5 | |||
[[Optimal tuning]]s: | |||
* [[WE]]: ~2 = 1199.3881{{c}}, ~121/70 = 951.4033{{c}}, ~5/4 = 387.4865{{c}} | |||
: [[error map]]: {{val| -0.612 +0.852 -0.051 -0.752 +1.246 }} | |||
* [[CWE]]: ~2 = 1200.0000{{c}}, ~121/70 = 951.8708{{c}}, ~5/4 = 387.2432{{c}} | |||
: 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 }} | |||
[[Badness]] (Sintel): 2.72 | |||
=== 13-limit === | |||
Subgroup: 2.3.5.7.11.13 | |||
Comma list: 352/351, 364/363, 676/675 | |||
Mapping: {{mapping| 1 0 0 -13 -6 -1 | 0 2 0 17 9 3 | 0 0 1 1 1 1 }} | |||
Optimal tunings: | |||
* WE: ~2 = 1199.3660{{c}}, ~26/15 = 951.3934{{c}}, ~5/4 = 387.4050{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~26/15 = 951.8815{{c}}, ~5/4 = 387.1043{{c}} | |||
{{Optimal ET sequence|legend=0| 24, 29, 34d, 53d, 58, 87, 121, 179ef, 208, 266ef, 474beef }} | |||
Badness (Sintel): 0.991 | |||
Complexity spectrum: 15/13, 4/3, 13/10, 9/8, 13/11, 15/11, 12/11, 11/9, 11/8, 14/11, 16/13, 16/15, 11/10, 13/12, 9/7, 5/4, 18/13, 7/6, 6/5, 8/7, 10/9, 14/13, 15/14, 7/5 | |||
=== 17-limit === | |||
Subgroup: 2.3.5.7.11.13.17 | |||
Comma list: 256/255, 352/351, 364/363, 676/675 | |||
Mapping: {{mapping| 1 0 0 -13 -6 -1 8 | 0 2 0 17 9 3 -2 | 0 0 1 1 1 1 -1 }} | |||
Optimal tunings: | |||
* WE: ~2 = 1199.2826{{c}}, ~26/15 = 951.3284{{c}}, ~5/4 = 387.6639{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~26/15 = 951.8791{{c}}, ~5/4 = 387.7230{{c}} | |||
{{Optimal ET sequence|legend=0| 24, 34d, 58, 87, 121, 179ef, 208g, 266efg }} | |||
Badness (Sintel): 1.18 | |||
== Trienparapyth == | |||
Named by [[Godtone]] in 2024, trienparapyth can be described as the {{nowrap| 58 & 80 & 87 }} temperament, with an extension to the no-17's 23-limit. It splits the ~4/3 generator of parapythic into three [[~]][[11/10]]'s by tempering out [[4000/3993]] ([[S-expression|S10/S11]]) in the 11-limit. It further interprets (11/10)<sup>2</sup> accurately as [[23/19]] in its full subgroup, tempering out [[2300/2299]] ([[S-expression|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]] ({{S|39}}). 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. | |||
[[Subgroup]]: 2.3.5.7.11 | |||
[[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 generators: ~2, ~11/10, ~5 | |||
[[Optimal tuning]]s: | |||
* [[WE]]: ~2 = 1199.3706{{c}}, ~11/10 = 165.2428{{c}}, ~5/4 = 388.1147{{c}} | |||
: [[error map]]: {{val| -0.629 +1.058 +0.542 -0.899 +0.151 }} | |||
* [[CWE]]: ~2 = 1200.0000{{c}}, ~11/10 = 165.3593{{c}}, ~5/4 = 387.8093{{c}} | |||
: error map: {{val| 0.000 +1.967 +1.496 +0.031 +1.851 }} | |||
{{Optimal ET sequence|legend=1| 22, 51, 58, 80, 87, 145, 167, 312ce, 479bce }} | |||
[[Badness]] (Sintel): 1.52 | |||
=== 13-limit === | |||
Subgroup: 2.3.5.7.11.13 | |||
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 generators: ~2, ~11/10, ~5 | |||
Optimal tunings: | |||
* WE: ~2 = 1199.4286{{c}}, ~11/10 = 165.2932{{c}}, ~5/4 = 388.2127{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~11/10 = 165.3802{{c}}, ~5/4 = 387.8759{{c}} | |||
{{Optimal ET sequence|legend=0| 22, 29, 51f, 51cde, 58, 80, 87, 145, 167, 225ce, 254, 312ce }} | |||
Badness (Sintel): 1.15 | |||
=== 2.3.5.7.11.13.19 subgroup === | |||
Note [[109edo]] is a good patent val tuning not listed in the optimal ET sequence here. | |||
Subgroup: 2.3.5.7.11.13.19 | |||
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 generators: ~2, ~11/10, ~5 | |||
Optimal tunings: | |||
* WE: ~2 = 1199.3123{{c}}, ~11/10 = 165.2022{{c}}, ~5/4 = 388.1654{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~11/10 = 165.2976{{c}}, ~5/4 = 387.7451{{c}} | |||
{{Optimal ET sequence|legend=0| 22, 29, 51fh, 51cde, 58h, 80, 87, 138cdeh, 167h }} | |||
Badness (Sintel): 1.20 | |||
=== 2.3.5.7.11.13.19.23 subgroup === | |||
Subgroup: 2.3.5.7.11.13.19.23 | |||
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 generators: ~2, ~11/10, ~5 | |||
Optimal tunings: | |||
* WE: ~2 = 1199.2714{{c}}, ~11/10 = 165.1718{{c}}, ~5/4 = 388.1729{{c}} | |||
* CWE: ~2 = 1200.0000{{c}}, ~11/10 = 165.2679{{c}}, ~5/4 = 387.7240{{c}} | |||
{{Optimal ET sequence|legend=0| 22i, 29, 51fhi, 51cde, 58hi, 80, 87, 109, 138cdehi, 167hi }} | |||
Badness: | Badness (Sintel): 1.14 | ||
[[Category:Temperament clans]] | |||
[[Category:Temperament | [[Category:Pentacircle clan| ]] <!-- main article --> | ||
[[Category:Pentacircle | |||
[[Category:Rank 3]] | [[Category:Rank 3]] | ||