Semaphoresmic family: Difference between revisions

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'''Semiphore family''' is a rank-3 temperament family of 2.3.5.7 that tempers out 49/48 and thereby identifies the septimal minor third, 7/6, and the septimal whole tone, 8/7. It also splits the fourth into two of these intervals; hence the name, which sounds like "semi-fourth". Related to this is the 2.3.7-limit 49/48 temperament called "[[Chromatic pairs #Semaphore|semaphore]]," and the 2.3.5.7 49/48 and 81/80 temperament called "[[Meantone family #Godzilla|godzilla]]".


Semiphore is a rank-3 temperament of 2.3.5.7 that tempers out 49/48 and thereby identifies the septimal minor third, 7/6, and the septimal whole tone, 8/7. It also splits the fourth into two of these intervals; hence the name, which sounds like "semi-fourth". Related to this is the 2.3.7-limit 49/48 temperament called "[[Chromatic_pairs#Semaphore|semaphore]]," and the 2.3.5.7 49/48 and 81/80 temperament called [[Meantone_family|"godzilla"]].
= Semiphore =
Comma list: 49/48


Comma: 49/48
Mapping: [{{val| 1 0 2 2 }}, {{val| 0 2 0 1 }}, {{val| 0 0 1 0 }}]


Lattice basis: 7/6 0.7627 5/4 2.322
Mapping: Generators: 2, 7/4, 5


Angle(7/6, 5/4) = 90 degrees
Lattice basis:
: 7/6 length = 0.7627, 5/4 length = 2.322
: Angle (7/6, 5/4) = 90 degrees


Map: [<1 0 2 2|, <0 2 0 1|, <0 0 1 0|]
{{Val list|legend=1| 4, 5, 9, 10, 15, 19 }}
 
Generators: 2, 7/4, 5
 
EDOs: 4, 5, 9, 10, 15, 19


Badness: 0.000116
Badness: 0.000116


=Selenium=
= Selenium =
Commas: 49/48, 56/55
Comma list: 49/48, 56/55


Map: [<1 0 2 2 5|, <0 2 0 1 1|, <0 0 1 0 -1|]
Mapping: [{{val| 1 0 2 2 5 }}, {{val| 0 2 0 1 1 }}, {{val| 0 0 1 0 -1 }}]


EDOs: 4, 5, 9, 10, 15, 19, 24, 34
{{Val list|legend=1| 4, 5, 9, 10, 15, 19, 24, 34 }}


Badness: 0.000665
Badness: 0.000665


==13-limit==
== 13-limit ==
Commas: 49/48, 56/55, 91/90
Comma list: 49/48, 56/55, 91/90


Map: [<1 0 2 2 5 -1|, <0 2 0 1 1 3|, <0 0 1 0 -1 1|]
Mapping: [{{val| 1 0 2 2 5 -1 }}, {{val| 0 2 0 1 1 3 }}, {{val| 0 0 1 0 -1 1 }}]


EDOs: 5, 9, 10, 15, 19, 24, 34
{{Val list|legend=1| 5, 9, 10, 15, 19, 24, 34 }}


Badness: 0.000787
Badness: 0.000787


=Negric=
= Negric =
Commas: 49/48, 225/224
Comma list: 49/48, 225/224


Map: [<1 2 2 3 0|, <0 -4 3 -2 0|, <0 0 0 0 1|]
Mapping: [{{val| 1 2 2 3 0 }}, {{val| 0 -4 3 -2 0 }}, {{val| 0 0 0 0 1 }}]


EDOs: 9, 10, 19, 29, 38d, 67cde
{{Val list|legend=1| 9, 10, 19, 29, 38d, 67cde }}


Badness: 0.001087
Badness: 0.001087


==13-limit==
== 13-limit ==
Commas: 49/48, 65/64, 91/90
Comma list: 49/48, 65/64, 91/90


Map: [<1 2 2 3 0 4|, <0 -4 3 -2 0 -3|, <0 0 0 0 1 0|]
Mapping: [{{val| 1 2 2 3 0 4 }}, {{val| 0 -4 3 -2 0 -3 }}, {{val| 0 0 0 0 1 0 }}]


EDOs: 9, 10, 19, 29, 38df, 67cdef
{{Val list|legend=1| 9, 10, 19, 29, 38df, 67cdef }}


Badness: 80.756
Badness: 80.756
[[Category:Theory]]
[[Category:Temperament family]]
[[Category:Semiphore]]
[[Category:Rank 3]]