5th-octave temperaments: Difference between revisions
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The most notable 5th-octave family is [[limmic temperaments]] – [[tempering out]] [[256/243]] and associates 3\5 to [[3/2]] as well as 1\5 to [[9/8]], producing temperaments like [[blackwood]]. Equally notable among small equal divisions are the [[Cloudy clan|cloudy temperaments]] – identifying [[8/7]] with one step of 5edo. | The most notable 5th-octave family is [[limmic temperaments]] – [[tempering out]] [[256/243]] and associates 3\5 to [[3/2]] as well as 1\5 to [[9/8]], producing temperaments like [[blackwood]]. Equally notable among small equal divisions are the [[Cloudy clan|cloudy temperaments]] – identifying [[8/7]] with one step of 5edo. | ||
Other families of 5-limit 5th-octave commas are: | Other families of 5-limit 5th-octave commas are: | ||
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== Quint == | == Quint == | ||
''Quint'' preserves the 5-limit mapping of 5edo, and the harmonic 7 is mapped to an independent generator. In what way is this useful is unexplained. | |||
[[Subgroup]]: 2.3.5.7 | [[Subgroup]]: 2.3.5.7 | ||
Revision as of 20:34, 24 October 2023
Template:Fractional-octave navigation 5edo is the smallest xenharmonic system, as 1edo, 2edo, 3edo and 4edo are all subsets of 12edo.
The most notable 5th-octave family is limmic temperaments – tempering out 256/243 and associates 3\5 to 3/2 as well as 1\5 to 9/8, producing temperaments like blackwood. Equally notable among small equal divisions are the cloudy temperaments – identifying 8/7 with one step of 5edo.
Other families of 5-limit 5th-octave commas are:
- Pental temperaments - tempers out the [-28 25 -5⟩ comma which improves the 3/2 mapping for 5edo, producing a temperament with 3/2 as a generator and 1\5 as a period.
- Quintosec temperaments
- Trisedodge temperaments
Quint
Quint preserves the 5-limit mapping of 5edo, and the harmonic 7 is mapped to an independent generator. In what way is this useful is unexplained.
Subgroup: 2.3.5.7
Comma list: 16/15, 27/25
Mapping: [⟨5 8 12 0], ⟨0 0 0 1]]
- mapping generators: ~9/8, ~7
Wedgie: ⟨⟨ 0 0 5 0 8 12 ]]
Optimal tuning (POTE): ~9/8 = 1\5, ~7/4 = 1017.903
Badness: 0.048312
Pentonismic (rank-5)
Subgroup: 2.3.5.7.11.13
Comma list: 281974669312/281950621875
Mapping: [⟨5 0 0 0 0 24], ⟨0 1 0 0 0 -1], ⟨0 0 1 0 0 -1], ⟨0 0 0 1 0 1]]
- mapping generators: ~224/195 = 1\5, ~3, ~5, ~7, ~11
Supporting ETs: 10, 50, 80, 120, 125, 270, 2000, 2460, 3125, 3395, 5585