89/88: Difference between revisions
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{{Infobox Interval | {{Infobox Interval | ||
| Name = | | Name = tailwind comma | ||
| Color name = 89o1u1 | | Color name = 89o1u1 | ||
| Comma = yes | | Comma = yes | ||
}} | }} | ||
'''89/88''', a.k.a. the ''' | '''89/88''', a.k.a. the '''tailwind comma''', is an [[89-limit]] [[superparticular]] [[comma]] tempered out by two of the [[Batch 89 temperaments]]. | ||
Tempering this comma on its own gives the | Tempering this comma on its own gives the tailwind temperament, a 2.11.89 [[subgroup]] temperament. | ||
Tempering out 89/88 equates the harmonics [[11/8]] and [[89/64]]. | |||
If ''not'' tempered out, then 89/88 is very well approximated by 1 step of [[36edf]]. | |||
== Tailwind == | |||
<pre> | |||
Equal Temperament Mappings | |||
2 11 89 | |||
[ ⟨ 2 7 13 ] | |||
⟨ 9 31 58 ] ⟩ | |||
Reduced Mapping | |||
2 11 89 | |||
[ ⟨ 1 4 7 ] | |||
⟨ 0 -1 -1 ] ⟩ | |||
TE Generator Tunings (cents) | |||
⟨1200.9330, 648.6921] | |||
TE Step Tunings (cents) | |||
⟨166.43584, 96.45125] | |||
TE Tuning Map (cents) | |||
⟨1200.933, 4155.040, 7757.839] | |||
TE Mistunings (cents) | |||
⟨0.933, 3.722, -13.041] | |||
These calculations use inharmonic TE. Subgroup TE will not work because the basis is not a subgroup of the rational numbers or has a redundant entry or something else is wrong. | |||
Complexity 0.118010 | |||
Adjusted Error 9.221690 cents | |||
TE Error 1.424038 cents/octave | |||
Unison Vector | |||
[-3, -1, 1⟩ (89:88) | |||
Scala Files | |||
Number of notes per octave | |||
TE 2 9 | |||
Pure octaves 2 9 | |||
</pre> | |||
[[Category:Commas named for other reasons]] | [[Category:Commas named for other reasons]] |
Revision as of 22:57, 14 December 2024
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Interval information |
reduced
89/88, a.k.a. the tailwind comma, is an 89-limit superparticular comma tempered out by two of the Batch 89 temperaments.
Tempering this comma on its own gives the tailwind temperament, a 2.11.89 subgroup temperament.
Tempering out 89/88 equates the harmonics 11/8 and 89/64.
If not tempered out, then 89/88 is very well approximated by 1 step of 36edf.
Tailwind
Equal Temperament Mappings 2 11 89 [ ⟨ 2 7 13 ] ⟨ 9 31 58 ] ⟩ Reduced Mapping 2 11 89 [ ⟨ 1 4 7 ] ⟨ 0 -1 -1 ] ⟩ TE Generator Tunings (cents) ⟨1200.9330, 648.6921] TE Step Tunings (cents) ⟨166.43584, 96.45125] TE Tuning Map (cents) ⟨1200.933, 4155.040, 7757.839] TE Mistunings (cents) ⟨0.933, 3.722, -13.041] These calculations use inharmonic TE. Subgroup TE will not work because the basis is not a subgroup of the rational numbers or has a redundant entry or something else is wrong. Complexity 0.118010 Adjusted Error 9.221690 cents TE Error 1.424038 cents/octave Unison Vector [-3, -1, 1⟩ (89:88) Scala Files Number of notes per octave TE 2 9 Pure octaves 2 9