8th-octave temperaments: Difference between revisions
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{{Fractional-octave navigation|8}} | {{Fractional-octave navigation|8}} | ||
Discussed elsewhere are: | |||
* ''Octant'', → [[Schismatic family#Octant|Schismatic family]] | |||
* ''Octoid'', → [[Ragismic microtemperaments#Octoid|Ragismic microtemperaments]] | |||
== Octatonic == | |||
[[12/11]] is very close to 1 step of 8edo, and hence this temperament tempers out the octatonic comma, the difference between a stack of 8 12/11's and the octave. | |||
Subgroup: 2.3.5.7.11 | |||
Comma list: {{monzo|15 8 0 0 -8}} | |||
{{Mapping|legend=1|8 0 0 0 15|0 1 0 0 1|0 0 1 0 0|0 0 0 1 0}} | |||
: mapping generators: ~12/11 = 1\8, ~3, ~5, ~7 | |||
[[Support]]ing [[ET]]s: {{EDOs|16, 24, 32, 48, 56, 80, 72, 120, 128, 152}}, ... | |||
== Octium == | == Octium == | ||
Octium temperament is named after an "extended provisional" name for oxygen, the 8th element. The term [[oxygen]] itself is already the name of an exotemperament. | Octium temperament is named after an "extended provisional" name for oxygen, the 8th element. The term [[oxygen]] itself is already the name of an exotemperament. | ||
Revision as of 17:50, 21 October 2023
Template:Fractional-octave navigation Discussed elsewhere are:
- Octant, → Schismatic family
- Octoid, → Ragismic microtemperaments
Octatonic
12/11 is very close to 1 step of 8edo, and hence this temperament tempers out the octatonic comma, the difference between a stack of 8 12/11's and the octave.
Subgroup: 2.3.5.7.11
Comma list: [15 8 0 0 -8⟩
Mapping: [⟨8 0 0 0 15], ⟨0 1 0 0 1], ⟨0 0 1 0 0], ⟨0 0 0 1 0]]
- mapping generators: ~12/11 = 1\8, ~3, ~5, ~7
Supporting ETs: 16, 24, 32, 48, 56, 80, 72, 120, 128, 152, ...
Octium
Octium temperament is named after an "extended provisional" name for oxygen, the 8th element. The term oxygen itself is already the name of an exotemperament.
Subgroup: 2.3.19.23.29.31
Comma list: 94221/94208, 419957/419904, 219501/219488, 7997934975003/7996960669696
Subgroup-val mapping: [⟨8 2 35 25 47 2], ⟨0 21 -2 22 -16 74]]
- mapping generators: ~10051/9216 = 1\8, ~231173/221184 = 76.284
Optimal tuning (CTE): ~231173/221184 = 76.284