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Luna and hemithirds: Difference between revisions

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{{Breadcrumb|Didacus}}
{{Infobox regtemp
 
{{Infobox Regtemp
| Title = Hemithirds
| Title = Hemithirds
| Subgroups = 2.3.5.7
| Subgroups = 2.3.5.7
| Comma basis = [[1029/1024]], [[3136/3125]] (2.3.5.7)
| Comma basis = [[1029/1024]], [[3136/3125]] (2.3.5.7)
| Edo join 1 = 31 | Edo join 2 = 56
| Edo join 1 = 31 | Edo join 2 = 87
| Generator = 28/25 | Generator tuning = 193.239 | Optimization method = CWE
| Mapping = 1; -15 2 5
| Generators = 28/25 | Generators tuning = 193.2 | Optimization method = CWE
| MOS scales = [[1L 5s]], [[6L 1s]], [[6L 7s]], [[6L 13s]], [[6L 19s]], [[25L 6s]]
| MOS scales = [[1L 5s]], [[6L 1s]], [[6L 7s]], [[6L 13s]], [[6L 19s]], [[25L 6s]]
| Mapping = 1; -15 2 5
| Pergen = (P8, ccP4/15)
| Color name = Latrizo & Zozoquinguti
| Odd limit 1 = 7 | Mistuning 1 = 2.5 | Complexity 1 = 56
| Odd limit 1 = 7 | Mistuning 1 = 2.5 | Complexity 1 = 56
| Odd limit 2 = (7-limit) 25 | Mistuning 2 = 3.6 | Complexity 2 = 87
| Odd limit 2 = 7-limit 25 | Mistuning 2 = 3.6 | Complexity 2 = 87
}}
}}
 
The [[7-limit]] '''hemithirds''' temperament functions as a strong extension of [[didacus]], the 2.5.7 subgroup temperament, which is defined by tempering out [[3136/3125]] such that two of its generators (hemithird, [[~]][[28/25]], around 193.2 [[cent]]s) reach ~[[5/4]], three reach ~[[7/5]], and therefore five reach ~[[7/4]]. Hemithirds extends didacus in the range between [[25edo]] and [[31edo]] tuning, by tempering out [[1029/1024]], such that three intervals of ~[[8/7]] reach ~[[3/2]], therefore finding ~[[4/3]] after fifteen generators in total. The canonical extension to the [[13-limit]] tempers out [[385/384]] and [[441/440]] to reach ~[[55/32]] at four ~8/7s and therefore ~[[11/8]] at 22 generators down, and then [[196/195]] (along with [[352/351]], [[625/624]], and [[1001/1000]]) to interpret the generator as ~[[143/128]] and find ~[[13/8]] at 23 generators up.
The [[7-limit]] '''hemithirds''' temperament functions as a strong extension of [[didacus]], the 2.5.7 subgroup temperament, in the range between [[25edo]] and [[31edo]] tuning, defined by tempering out [[3136/3125]] such that two of its generators (hemithird, [[~]][[28/25]], around 193.2 [[cent]]s) reach ~[[5/4]], three reach ~[[7/5]], and therefore five reach ~[[7/4]]. Hemithirds extends didacus by tempering out [[1029/1024]], such that three intervals of ~[[8/7]] reach ~[[3/2]], therefore finding ~[[4/3]] after fifteen generators in total. The canonical extension to the [[13-limit]] tempers out [[385/384]] and [[441/440]] to reach ~[[55/32]] at four ~8/7s and therefore ~[[11/8]] at 22 generators down, and then [[196/195]] (along with [[352/351]], [[625/624]], and [[1001/1000]]) to interpret the generator as ~[[143/128]] and find ~[[13/8]] at 23 generators up.


'''Luna''' is a restriction of hemithirds to the [[5-limit]] that is a [[microtemperament]], supported by such high-precision tuning systems as [[323edo]] and [[441edo]]; another notable tuning of luna is [[1000edo]]. It can further be re-extended to the 7-limit in the form of [[lunatic]] by adding [[4375/4374]] to the comma list, but that extension is extremely complex (finding the 7th harmonic at 113 generators down).
'''Luna''' is a restriction of hemithirds to the [[5-limit]] that is a [[microtemperament]], supported by such high-precision tuning systems as [[323edo]] and [[441edo]]; another notable tuning of luna is [[1000edo]]. It can further be re-extended to the 7-limit in the form of [[lunatic]] by adding [[4375/4374]] to the comma list, but that extension is extremely complex (finding the 7th harmonic at 113 generators down).


See [[Hemimean clan #Hemithirds]] and [[Luna family #Luna]] for more information.  
See [[Hemimean clan #Hemithirds]] and [[Luna family #Luna]] for more information.


== Intervals ==
== Intervals ==
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| 386.5
| 386.5
| '''5/4'''
| '''5/4'''
| 96/77
|  
|-
|-
| 3
| 3
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| 773.0
| 773.0
| '''25/16'''
| '''25/16'''
| 39/25, 120/77
| 39/25
|-
|-
| 5
| 5
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| 112.1
| 112.1
| '''16/15'''
| '''16/15'''
| 77/72
|  
|-
|-
| 14
| 14
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| 71.5
| 71.5
| 25/24
| 25/24
| 26/25, 80/77
| 26/25
|-
|-
| 20
| 20
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=== Tuning spectrum ===
=== Tuning spectrum ===
{{see also|Didacus #Tuning spectrum}}
Vals are for 13-limit hemithirds and 7-limit lunatic in their respective ranges.
Vals are for 13-limit hemithirds and 7-limit lunatic in their respective ranges.


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| [[32/21]]
| [[32/21]]
| 192.9219
| 192.9219
|
|-
|
| [[40/21]]
| 192.9601
|  
|  
|-
|-
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| 193.5484
| 193.5484
| '''Upper bound of 9- to 15-odd-limit diamond monotone'''
| '''Upper bound of 9- to 15-odd-limit diamond monotone'''
|-
|
| [[35/32]]
| 193.5914
| 3/7-comma didacus
|-
|-
|  
|  
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| 194.5946
| 194.5946
| 37beff val, '''upper bound of 7-odd-limit diamond monotone'''
| 37beff val, '''upper bound of 7-odd-limit diamond monotone'''
|-
|
| [[28/25]]
| 196.1985
| Untempered didacus
|}
|}
<nowiki />* Besides the octave
<nowiki />* Besides the octave
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|}
|}


[[Category:Temperaments]]
[[Category:Hemithirds| ]] <!-- main article -->
[[Category:Hemithirds| ]] <!-- main article -->
[[Category:Rank-2 temperaments]]
[[Category:Rank-2 temperaments]]
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