Syntonic–limmic equivalence continuum: Difference between revisions
Switch to Sintel's badness, WE & CWE tunings. Comment out unnamed temps |
m - typo |
||
| (12 intermediate revisions by 4 users not shown) | |||
| Line 1: | Line 1: | ||
{{Technical data page}} | {{Technical data page}} | ||
The '''syntonic–diatonic equivalence continuum''' is a [[equivalence continuum|continuum]] of [[regular temperament|temperaments]] which equate a number of [[81/80|syntonic commas (81/80)]] with the [[256/243|Pythagorean limma (256/243)]]. This continuum is theoretically interesting in that these are all [[5-limit]] temperaments [[support]]ed by [[5edo]]. | The '''syntonic–limmic''' (or '''syntonic–diatonic''') '''equivalence continuum''' is a [[equivalence continuum|continuum]] of [[regular temperament|temperaments]] which equate a number of [[81/80|syntonic commas (81/80)]] with the [[256/243|Pythagorean limma (256/243)]]. This continuum is theoretically interesting in that these are all [[5-limit]] temperaments [[support]]ed by [[5edo]]. | ||
All temperaments in the continuum satisfy {{nowrap|(81/80)<sup>''n''</sup> ~ 256/243}}. Varying ''n'' results in different temperaments listed in the table below. It converges to [[meantone]] as ''n'' approaches infinity. If we allow non-integer and infinite ''n'', the continuum describes the set of all 5-limit temperaments supported by 5edo due to it being the unique equal temperament that [[tempering out|tempers out]] both commas and thus tempers out all combinations of them. The just value of ''n'' is 4.1952…, and temperaments near this tend to be the most accurate ones. | All temperaments in the continuum satisfy {{nowrap|(81/80)<sup>''n''</sup> ~ 256/243}}. Varying ''n'' results in different temperaments listed in the table below. It converges to [[meantone]] as ''n'' approaches infinity. If we allow non-integer and infinite ''n'', the continuum describes the set of all 5-limit temperaments supported by 5edo due to it being the unique equal temperament that [[tempering out|tempers out]] both commas and thus tempers out all combinations of them. The just value of ''n'' is 4.1952…, and temperaments near this tend to be the most accurate ones. | ||
| Line 94: | Line 94: | ||
| {{Monzo| -32 29 -6 }} | | {{Monzo| -32 29 -6 }} | ||
|- | |- | ||
| … | |||
| … | | … | ||
| … | | … | ||
| Line 106: | Line 107: | ||
|} | |} | ||
We may invert the continuum by setting ''m'' such that {{nowrap| 1/''m'' + 1/''n'' {{=}} 1 }}. This may be called the '' | We may invert the continuum by setting ''m'' such that {{nowrap| 1/''m'' + 1/''n'' {{=}} 1 }}. This may be called the ''superpyth–limmic equivalence continuum'', which is essentially the same thing. The just value of ''m'' is 1.3130…. The [[superpyth comma]] is both larger and more complex than the syntonic comma. As such, this continuum does not contain as many useful temperaments, but still interesting nonetheless. | ||
{| class="wikitable center-1" | {| class="wikitable center-1" | ||
| Line 170: | Line 171: | ||
|- | |- | ||
| 21/5 = 4.2 || 21/16 = 1.3125 || 559 & 2513 || {{Monzo| -124 109 -21 }} | | 21/5 = 4.2 || 21/16 = 1.3125 || 559 & 2513 || {{Monzo| -124 109 -21 }} | ||
|- | |||
| 13/3 = 4.{{overline|3}} || 13/10 = 1.3 || [[Tokko]] || {{Monzo| -76 67 -13 }} | |||
|- | |- | ||
| 9/2 = 4.5 || 9/7 = 1.{{overline|285714}} || 5 & 118 || {{Monzo| -52 46 -9 }} | | 9/2 = 4.5 || 9/7 = 1.{{overline|285714}} || 5 & 118 || {{Monzo| -52 46 -9 }} | ||
| Line 194: | Line 197: | ||
* [[CWE]]: ~2 = 1200.0000{{c}}, ~3/2 = 709.8213{{c}} | * [[CWE]]: ~2 = 1200.0000{{c}}, ~3/2 = 709.8213{{c}} | ||
: error map: {{val| 0.000 +7.866 +2.078 }} | : error map: {{val| 0.000 +7.866 +2.078 }} | ||
{{Optimal ET sequence|legend=1| 5, 17, 22, 49, 120b, 169bbc }} | {{Optimal ET sequence|legend=1| 5, 17, 22, 49, 120b, 169bbc }} | ||
| Line 206: | Line 205: | ||
: ''For extensions, see [[Trienstonic clan #Uncle]].'' | : ''For extensions, see [[Trienstonic clan #Uncle]].'' | ||
The 5-limit version of uncle tempers out [[4096/3645]]. It is generated by a fifth that is supposedly sharper than [[5edo|3\5]], so it leads to an [[5L 3s|oneirotonic]] scale, or otherwise a [[5L 2s|diatonic]] scale with negative small steps. The interval class of 5 is found at | The 5-limit version of uncle tempers out [[4096/3645]]. It is generated by a fifth that is supposedly sharper than [[5edo|3\5]], so it leads to an [[5L 3s|oneirotonic]] scale, or otherwise a [[5L 2s|diatonic]] scale with negative small steps. The interval class of 5 is found at −6 fifths, as a major 2-step in oneirotonic, or a diminished fifth (C–Gb) in diatonic. It corresponds to {{nowrap| ''n'' {{=}} −1/2 }} or {{nowrap| ''m'' {{=}} 1/3 }}. | ||
[[Subgroup]]: 2.3.5 | [[Subgroup]]: 2.3.5 | ||
| Line 217: | Line 216: | ||
[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
* [[WE]]: ~2 = 1189.7544{{c}}, ~3/2 = 724.6670{{c}} | * [[WE]]: ~2 = 1189.7544{{c}}, ~3/2 = 724.6670{{c}} | ||
: [[error map]]: {{val| -10.246 +12.466 +4.210 }} | : [[error map]]: {{val| -10.246 +12.466 +4.210 }} | ||
| Line 246: | Line 243: | ||
* [[CWE]]: ~2 = 1200.0000{{c}}, ~3/2 = 713.5968{{c}} | * [[CWE]]: ~2 = 1200.0000{{c}}, ~3/2 = 713.5968{{c}} | ||
: error map: {{val| 0.000 +11.642 +4.041 }} | : error map: {{val| 0.000 +11.642 +4.041 }} | ||
{{Optimal ET sequence|legend=1| 5, 27c, 32, 37, 79bc, 116bbc }} | {{Optimal ET sequence|legend=1| 5, 27c, 32, 37, 79bc, 116bbc }} | ||
| Line 258: | Line 251: | ||
{{Main| Dirt }} | {{Main| Dirt }} | ||
Dirt tempers out the [[dirt comma]], 1342177280/1162261467. It is generated by a perfect fifth. The interval class of 5 is found at +19 fifths, as a double-augmented seventh (C–Bx). It corresponds to {{nowrap| ''n'' {{=}} 1/3 }} and {{nowrap| ''m'' {{=}} | Dirt tempers out the [[dirt comma]], 1342177280/1162261467. It is generated by a perfect fifth. The interval class of 5 is found at +19 fifths, as a double-augmented seventh (C–Bx). It corresponds to {{nowrap| ''n'' {{=}} 1/3 }} and {{nowrap| ''m'' {{=}} −1/2 }}. | ||
[[Subgroup]]: 2.3.5 | [[Subgroup]]: 2.3.5 | ||
| Line 269: | Line 262: | ||
[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
* [[WE]]: ~2 = 1195.8566{{c}}, ~3/2 = 713.0611{{c}} | * [[WE]]: ~2 = 1195.8566{{c}}, ~3/2 = 713.0611{{c}} | ||
: [[error map]]: {{val| -4.143 +6.963 -0.863 }} | : [[error map]]: {{val| -4.143 +6.963 -0.863 }} | ||
| Line 283: | Line 274: | ||
: ''For extensions, see [[Gamelismic clan #Rodan]].'' | : ''For extensions, see [[Gamelismic clan #Rodan]].'' | ||
The 5-limit version of rodan tempers out the [[rodan comma]], which is the difference between a stack of three [[729/640|retroptolemaic whole tones (729/640)]] and a perfect fifth (3/2). The only 7-limit extension that makes any sense to use is to add the gamelisma to the comma list. It corresponds to {{nowrap| ''n'' {{=}} 3 }}. | The 5-limit version of rodan tempers out the [[rodan comma]], which is the difference between a stack of three [[729/640|retroptolemaic whole tones (729/640)]] and a perfect fifth (3/2). The only 7-limit extension that makes any sense to use is to add the gamelisma to the comma list, whereby the generator represents [[8/7]]. It corresponds to {{nowrap| ''n'' {{=}} 3 }}. | ||
[[Subgroup]]: 2.3.5 | [[Subgroup]]: 2.3.5 | ||
| Line 296: | Line 287: | ||
* [[CWE]]: ~2 = 1200.000{{c}}, ~729/640 = 234.4999{{c}} | * [[CWE]]: ~2 = 1200.000{{c}}, ~729/640 = 234.4999{{c}} | ||
: error map: {{val| 0.000 +1.545 +0.185 }} | : error map: {{val| 0.000 +1.545 +0.185 }} | ||
{{Optimal ET sequence|legend=1| 5, …, 41, 46, 87, 220, 307 }} | {{Optimal ET sequence|legend=1| 5, …, 41, 46, 87, 220, 307 }} | ||
| Line 308: | Line 295: | ||
: ''For extensions, see [[Gamelismic clan #Gorgo]].'' | : ''For extensions, see [[Gamelismic clan #Gorgo]].'' | ||
Laconic tempers out [[2187/2000]], which is the difference between a stack of three [[10/9|ptolemaic whole tones (10/9)]]'s and a perfect fifth (3/2). Although a higher-error temperament, it does pop up enough in the low-numbered edos to be useful, most notably in [[16edo]] and [[21edo]]. The only 7-limit extension that makes any sense to use is to add the gamelisma to the comma list. It corresponds to {{nowrap| ''n'' {{=}} | Laconic tempers out [[2187/2000]], which is the difference between a stack of three [[10/9|ptolemaic whole tones (10/9)]]'s and a perfect fifth (3/2). Although a higher-error temperament, it does pop up enough in the low-numbered edos to be useful, most notably in [[16edo]] and [[21edo]]. The only 7-limit extension that makes any sense to use is to add the gamelisma to the comma list. It corresponds to {{nowrap| ''n'' {{=}} −3 }}. | ||
[[Subgroup]]: 2.3.5 | [[Subgroup]]: 2.3.5 | ||
| Line 321: | Line 308: | ||
* [[CWE]]: ~2 = 1200.000{{c}}, ~10/9 = 228.0128{{c}} | * [[CWE]]: ~2 = 1200.000{{c}}, ~10/9 = 228.0128{{c}} | ||
: error map: {{val| 0.000 -17.917 +9.776 }} | : error map: {{val| 0.000 -17.917 +9.776 }} | ||
{{Optimal ET sequence|legend=1| 5, 11c, 16, 21, 37b }} | {{Optimal ET sequence|legend=1| 5, 11c, 16, 21, 37b }} | ||
| Line 331: | Line 314: | ||
== University == | == University == | ||
: ''For extensions, see [[Gamelismic clan #Gidorah]] and [[Mint temperaments #Penta]].'' | : ''For extensions, see [[Gamelismic clan #Gidorah]] and [[Mint temperaments #Penta]].'' | ||
Named by [[John Moriarty]], university is the {{nowrap| 5 & 6b }} temperament, and tempers out [[144/125]], the triptolemaic diminished third. It corresponds to {{nowrap| ''n'' {{=}} −3/2 }} and {{nowrap| ''m'' {{=}} 3/5 }}. In this temperament, two instances of [[6/5]] make a [[5/4]], and three make a [[3/2]]. Equating 6/5 with [[8/7]] (which makes sense since it is already very flat in the most accurate tunings of this temperament) leads to [[Gamelismic clan #Gidorah|gidorah]], and 6/5 with [[7/6]] leads to [[Mint temperaments #Penta|penta]]. | Named by [[John Moriarty]], university is the {{nowrap| 5 & 6b }} temperament, and tempers out [[144/125]], the triptolemaic diminished third. It corresponds to {{nowrap| ''n'' {{=}} −3/2 }} and {{nowrap| ''m'' {{=}} 3/5 }}. In this temperament, two instances of [[6/5]] make a [[5/4]], and three make a [[3/2]]. Equating 6/5 with [[8/7]] (which makes sense since it is already very flat in the most accurate tunings of this temperament) leads to [[Gamelismic clan #Gidorah|gidorah]], and 6/5 with [[7/6]] leads to [[Mint temperaments #Penta|penta]]. | ||
University widens the classical major and minor chords to [[Extraclassical tonality|tendo and arto chords.]] | |||
[[Subgroup]]: 2.3.5 | [[Subgroup]]: 2.3.5 | ||
| Line 347: | Line 331: | ||
* [[CWE]]: ~2 = 1200.000{{c}}, ~6/5 = 231.4822{{c}} | * [[CWE]]: ~2 = 1200.000{{c}}, ~6/5 = 231.4822{{c}} | ||
: error map: {{val| 0.000 -7.509 +76.651 }} | : error map: {{val| 0.000 -7.509 +76.651 }} | ||
{{Optimal ET sequence|legend=1| 1b, …, 4bc, 5 }} | {{Optimal ET sequence|legend=1| 1b, …, 4bc, 5 }} | ||
| Line 356: | Line 336: | ||
[[Badness]] (Sintel): 2.39 | [[Badness]] (Sintel): 2.39 | ||
=== Music === | |||
The purely 5-limit university mapping, using the 21cc [[val]], was in mind when writing this song. | |||
; [[John Moriarty]] | |||
* [https://soundcloud.com/john-lank1/uni ''Uni''] (2013) – University[6] in approximately 21edo | |||
<!-- | <!-- | ||
== Trisatriyo (5 & 56) == | == Trisatriyo (5 & 56) == | ||
| Line 375: | Line 360: | ||
[http://x31eq.com/cgi-bin/rt.cgi?ets=5_56&limit=5 The temperament finder - 5-limit 5 & 56] | [http://x31eq.com/cgi-bin/rt.cgi?ets=5_56&limit=5 The temperament finder - 5-limit 5 & 56] | ||
--> | --> | ||
== Hemiseven (5-limit) == | == Hemiseven (5-limit) == | ||
: ''For extensions, see [[Gamelismic clan #Hemiseven]].'' | : ''For extensions, see [[Gamelismic clan #Hemiseven]].'' | ||
| Line 391: | Line 377: | ||
* [[CWE]]: ~2 = 1200.0000{{c}}, ~243/160 = 716.7671{{c}} | * [[CWE]]: ~2 = 1200.0000{{c}}, ~243/160 = 716.7671{{c}} | ||
: error map: {{val| 0.000 -1.352 -0.067 }} | : error map: {{val| 0.000 -1.352 -0.067 }} | ||
{{Optimal ET sequence|legend=1| 5, …, 72, 149, 221, 370, 591b }} | {{Optimal ET sequence|legend=1| 5, …, 72, 149, 221, 370, 591b }} | ||
| Line 398: | Line 383: | ||
== Counterpental == | == Counterpental == | ||
: ''For extensions, see [[Orwellismic temperaments # | : ''For extensions, see [[Orwellismic temperaments #Pentaorwell]].'' | ||
[[Subgroup]]: 2.3.5 | [[Subgroup]]: 2.3.5 | ||
| Line 413: | Line 398: | ||
* [[CWE]]: ~729/640 = 240.0000{{c}}, ~3/2 = 704.4446{{c}} | * [[CWE]]: ~729/640 = 240.0000{{c}}, ~3/2 = 704.4446{{c}} | ||
: error map: {{val| 0.000 +2.490 +0.354 }} | : error map: {{val| 0.000 +2.490 +0.354 }} | ||
{{Optimal ET sequence|legend=1| 5, …, 75, 80, 155, 390b, 545bbc }} | {{Optimal ET sequence|legend=1| 5, …, 75, 80, 155, 390b, 545bbc }} | ||
| Line 435: | Line 419: | ||
* [[CWE]]: ~2 = 1200.0000{{c}}, ~177147/102400 = 957.5367{{c}} | * [[CWE]]: ~2 = 1200.0000{{c}}, ~177147/102400 = 957.5367{{c}} | ||
: error map: {{val| 0.000 +0.802 +0.082 }} | : error map: {{val| 0.000 +0.802 +0.082 }} | ||
{{Optimal ET sequence|legend=1| 5, …, 94, 99, 193, 292, 391, 1074b, 1465bb }} | {{Optimal ET sequence|legend=1| 5, …, 94, 99, 193, 292, 391, 1074b, 1465bb }} | ||
[[Badness]] (Sintel): 22.8 | [[Badness]] (Sintel): 22.8 | ||
== Tokko (5-limit) == | |||
: ''For extensions, see [[Wizmic microtemperaments #Tokko]].'' | |||
[[Subgroup]]: 2.3.5 | |||
[[Comma list]]: {{monzo| -76 67 -13 }} | |||
{{Mapping|legend=1| 1 -1 -11 | 0 13 67 }} | |||
: mapping generators: ~2, ~{{monzo| -35 31 -6 }} | |||
[[Optimal tuning]]s: | |||
* [[WE]]: ~2 = 1200.0377{{c}}, ~{{monzo| -35 31 -6 }} = 238.6084{{c}} | |||
: [[error map]]: {{val| +0.038 -0.083 +0.035 }} | |||
* [[CWE]]: ~2 = 1200.0000{{c}}, ~{{monzo| -35 31 -6 }} = 238.6015{{c}} | |||
: error map: {{val| 0.000 -0.135 -0.011 }} | |||
{{Optimal ET sequence|legend=1| 5, …, 166, 171, 860, 1031, 1202, 1373, 1544, 3259, 4803b, 6347b }} | |||
[[Badness]] (Sintel): 20.9 | |||
<!-- | <!-- | ||
| Line 448: | Line 451: | ||
{{Mapping|legend=1| 1 -2 -16 | 0 9 46 }} | {{Mapping|legend=1| 1 -2 -16 | 0 9 46 }} | ||
: mapping generators: ~2, ~320/243 | : mapping generators: ~2, ~320/243 | ||
| Line 456: | Line 458: | ||
{{Optimal ET sequence|legend=1| 5, 108c, 113, 118, 1057, 1175, 1293, 1411, 1529, 1647, 1765, 1883, 2001b, 3884b }} | {{Optimal ET sequence|legend=1| 5, 108c, 113, 118, 1057, 1175, 1293, 1411, 1529, 1647, 1765, 1883, 2001b, 3884b }} | ||
[[Badness]] ( | [[Badness]] (Sintel): 14.5 | ||
== Tribilalegu (5 & 137) == | == Tribilalegu (5 & 137) == | ||
| Line 463: | Line 465: | ||
[[Comma list]]: {{Monzo| -60 54 -11 }} | [[Comma list]]: {{Monzo| -60 54 -11 }} | ||
{{Mapping|legend=1| 1 | {{Mapping|legend=1| 1 -5 -30 | 0 11 54 }} | ||
: mapping generators: ~2, ~243/160 | |||
: mapping generators: ~2, ~ | |||
[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
* [[POTE]]: ~2 = 1200.000{{c}}, ~ | * [[POTE]]: ~2 = 1200.000{{c}}, ~243/160 = 718.258{{c}} | ||
{{Optimal ET sequence|legend=1| 5, 127c, 132, 137, 553, 690b, 827b, 964b }} | {{Optimal ET sequence|legend=1| 5, 127c, 132, 137, 553, 690b, 827b, 964b }} | ||
[[Badness]] ( | [[Badness]] (Sintel): 84.9 | ||
== 559 & 2513 == | == 559 & 2513 == | ||
| Line 481: | Line 480: | ||
[[Comma list]]: {{monzo| -124 109 -21 }} | [[Comma list]]: {{monzo| -124 109 -21 }} | ||
{{Mapping|legend=1| 1 | {{Mapping|legend=1| 1 -11 -63 | 0 21 109 }} | ||
: mapping generators: ~2, ~{{monzo| -29 26 -5 }} | |||
: mapping generators: ~2, ~ | |||
[[Optimal tuning]]s: | [[Optimal tuning]]s: | ||
* [[POTE]]: ~2 = 1200.0000{{c}}, ~ | * [[POTE]]: ~2 = 1200.0000{{c}}, ~{{monzo| -29 26 -5 }} = 719.1405{{c}} | ||
{{Optimal ET sequence|legend=1| 5, | {{Optimal ET sequence|legend=1| 5, …, 277, 559, 1395, 1954, 2513, 40767, 43280, 45793, 48306, 50819, 53332, 55845, 58358, 60871, 63384, 65897, 68410, 70923, 73436, 75949, 78462, 154411b }} | ||
[[Badness]] ( | [[Badness]] (Sintel): 3.16 | ||
--> | --> | ||
[[Category:5edo]] | [[Category:5edo]] | ||
[[Category:Equivalence continua]] | [[Category:Equivalence continua]] | ||