Semaphore and godzilla: Difference between revisions

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{{interwiki
{{Interwiki
| en = Semaphore and godzilla
| en = Semaphore and godzilla
| de = Semiphor, Semaphor, Godzilla
| de = Semiphor, Semaphor, Godzilla
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| Mapping = 1; 2 8 1 11
| Mapping = 1; 2 8 1 11
| Generators = 7/4
| Generators = 7/4
| Generators tuning = 947.8
| Generators tuning = 948.0
| Optimization method = CWE
| Optimization method = CWE
| Pergen = (P8, P4/2)
| Pergen = (P8, P4/2)
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| Odd limit 2 = 2.3.5.7.13 15 | Mistuning 2 = 20.5 | Complexity 2 = 14
| Odd limit 2 = 2.3.5.7.13 15 | Mistuning 2 = 20.5 | Complexity 2 = 14
}}
}}
'''Semaphore''', of the [[semaphoresmic clan]], is characterized by [[49/48]] being [[tempering out|tempered out]], so the [[generator]] represents [[7/4]] and [[12/7]] (or [[8/7]] and [[7/6]]) equally. This results in a very low [[complexity]] 2.3.7-[[subgroup]] [[regular temperament|temperament]], with the drawback that most intervals of 7 must be out of tune by at least half of the comma 49/48, or about 18 [[cent]]s. ''Semaphore'' is a play on the words "semi-" and "fourth".
'''Semaphore''', of the [[semaphoresmic clan]], is characterized by [[49/48]] being [[tempering out|tempered out]], so the [[generator]] represents [[7/4]] and [[12/7]] (or [[8/7]] and [[7/6]]) equally. This results in a very low [[complexity]] [[2.3.7 subgroup|2.3.7-subgroup]] [[regular temperament|temperament]], with the drawback that most intervals of 7 must be out of tune by at least half of the comma 49/48, or about 18 [[cent]]s. ''Semaphore'' is a play on the words "semi-" and "fourth".


If the [[5/1|5th harmonic]]'s intervals are desired, [[5/4]] can be sensibly mapped to +8 generators by tempering out [[81/80]], making it a [[Meantone family #Extensions|meantone temperament]]. This temperament is '''godzilla'''. Moreover, the generator can be taken to be [[26/15]], which maps [[13/8]] to +11 generators by tempering out [[91/90]] and [[105/104]]. This extends the temperament to the 2.3.5.7.13 subgroup, with an abundance of harmonic resource and little additional damage.  
If the [[5/1|5th harmonic]]'s intervals are desired, [[5/4]] can be sensibly mapped to +8 generators by tempering out [[81/80]], making it a [[meantone family #Extensions|meantone temperament]]. This temperament is '''godzilla'''. Moreover, the generator can be taken to be [[26/15]], which maps [[13/8]] to +11 generators by tempering out [[91/90]] and [[105/104]]. This extends the temperament to the 2.3.5.7.13 subgroup, with an abundance of harmonic resource and little additional damage.  


A more accurate but complex mapping of 5 can be found in [[immunity]], or 5/4 itself can be made the period by tempering out [[128/125]], resulting in [[triforce]].
A more accurate but complex mapping of 5 can be found in [[immunity]], or 5/4 itself can be made the period by tempering out [[128/125]], resulting in [[triforce]].
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| 9/7
| 9/7
| 945.028
| 945.028
| 2/3-comma
|  
|-
|-
|  
|  
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| 3/2
| 3/2
| 950.978
| 950.978
| 1/2-comma
|  
|-
|-
|  
|  
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| 951.405
| 951.405
|  
|  
|-
| [[29edo|23\29]]
|
| 951.724
|
|-
| [[34edo|27\34]]
|
| 952.941
|
|-
|-
| [[5edo|4\5]]
| [[5edo|4\5]]
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| 968.826
| 968.826
|  
|  
|-
| [[6edo|5\6]]
|
| 1000.000
|
|}
|}
<nowiki/>* Besides the octave
<nowiki/>* Besides the octave