Interval size measure: Difference between revisions

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m "http://www.h-pi.com/theory/measurement3.html" is now a dead link; changed external link at text "H-Pi Instruments" (also changed from "H-pi Instruments") to "http://musictheory.zentral.zone/huntsystem1.html".
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Replaced large paragraph in "Logarithmic" section with a table displaying same information. Maintained proposed "backslash notation" in "Power of interval:" column, but I would have preferred to use forward slashes (see "Interval based on:" column).
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===Fine===
===Fine===
The [[cent]] (¢), [[1200edo|1\1200 octave]], is the classic measure for intervals when more precision than 12edo is required. Some people object to it on the grounds that it is too (obviously) closely related to 12 equal.
The [[cent]] (¢), [[1200edo|1\1200 octave]], is the classic measure for intervals when more precision than 12edo is required. Some people object to it on the grounds that it is too (obviously) closely related to 12 equal.  


Other measures include the [[Armodue_theory|Eka]], [[16edo|1\16 octave]], the [[Normal_diesis|Normal diesis]]: [[31edo|1\31 octave]]; the [[Méride]]: [[43edo|1\43 octave]]; the [[Holdrian_comma|Holdrian comma]]: [[53edo|1\53 octave]]; the [[Morion]]: [[72edo|1\72 octave]]; the [[Farab]]: [[144edo|1\144 octave]]; the [[Mem]]: [[205edo|1\205 octave]] (used by [http://musictheory.zentral.zone/huntsystem1.html H-Pi Instruments]); the [[Tredek]]: [[270edo|1\270 octave]]; the [[Eptaméride]] or [[Savart]]: [[301edo|1\301 of an octave]]; the [[Gene]]: [[311edo|1\311 octave]]; the [[Dröbisch_Angle|Dröbisch Angle]]: [[360edo|1\360 octave]]; the [[Squb]]: [[494edo|1\494 octave]]; the [[Iring]]: [[600edo|1\600 octave]]; the [[Skisma]]: [[612edo|1\612 octave]]; the [[Delfi]]: [[665edo|1\665 octave]]; the [[Woolhouse]]: [[730edo|1\730 octave]]; the [[millioctave]] (mO), [[1000edo|1\1000 octave]]; the [[fine_cent|fine cent]]s and fine cent-like units from [[1201edo|1\1201 octave]] down to [[1728edo|1\1728 octave]] (including the greater and lesser muons: [[1224edo|1\1224 octave]] and [[1428edo|1\1428 octave]]; the triangular, quadratic and cubic cents: [[1260edo|1\1260 octave]], [[1452edo|1\1452 octave]] and [[1500edo|1\1500 octave]]; the pion: [[1272edo|1\1272 octave]]; the pound: [[1344edo|1\1344 octave]]; the neutron: [[1392edo|1\1392 octave]]; the deciFarab: [[1440edo|1\1440 octave]]; the ksion: [[1476edo|1\1476 octave]]; the 7mu: [[1536edo|1\1536 octave]]; the rhoon: [[1560edo|1\1560 octave]]; the tile: [[1632edo|1\1632 octave]]; the [[Iota]]: [[1\1700_octave|1\1700 octave]] and finally the [[Harmos]]: [[1728edo|1\1728 octave]]); the [[Mina]]: [[2460edo|1\2460 octave]]; the [[Tina]]: [[8539edo|1\8539 octave]]; the [[Purdal]]: [[9900edo|1\9900 octave]]; the [[Türk_sent|Türk sent]]: [[10600edo|1\10600 octave]]; the [[Prima]]: [[12276edo|1\12276 octave]], the [[Jinn]]: [[16808edo|1\16808 octave]], the [[Jot]]: [[30103edo|1\30103 octave]]; the [[Imp]]: [[31920edo|1\31920 octave]]; the [[Flu]]: [[46032edo|1\46032 octave]]; and the [[MIDI_Tuning_Standard_unit|MIDI Tuning Standard unit]]: [[196608edo|1\196608 octave]]. Not based on the octave are the [[Grad]]: 1/12 of a Pythagorean comma, the [[Tuning unit]]: 1/720 of a Pythagorean comma and the [[Hekt]]: 1/1300 part of 3, ie 3^(1/1300).
The following table demonstrates a list of measures derived from the logarithmic division of a interval (e.g. octave, twelfth):
{| class="wikitable sortable"
|+List of Fine Measures (Logarithmic)
!Unit name (symbol):
!Interval based on:
!Power of interval:
!Significance
|-
|[[Armodue_theory|Eka]]
|2/1 (octave)
|[[16edo|1\16]]
|
|-
|[[Normal_diesis|Normal diesis]]
|2/1 (octave)
|[[31edo|1\31]]
|
|-
|[[Méride]]
|2/1 (octave)
|[[43edo|1\43]]
|
|-
|[[Holdrian_comma|Holdrian comma]]
|2/1 (octave)
|[[53edo|1\53]]
|
|-
|[[Morion]]
|2/1 (octave)
|[[72edo|1\72]]
|
|-
|[[Farab]]
|2/1 (octave)
|[[144edo|1\144]]
|
|-
|[[Mem]]
|2/1 (octave)
|[[205edo|1\205]]
|Unit used by [http://musictheory.zentral.zone/huntsystem1.html H-Pi Instruments]
|-
|[[Tredek]]
|2/1 (octave)
|[[270edo|1\270]]
|
|-
|[[Eptaméride]] or [[Savart]]
|2/1 (octave)
|[[301edo|1\301]]
|
|-
|[[Gene]]
|2/1 (octave)
|[[311edo|1\311]]
|
|-
|[[Dröbisch_Angle|Dröbisch Angle]]
|2/1 (octave)
|[[360edo|1\360]]
|
|-
|[[Squb]]
|2/1 (octave)
|[[494edo|1\494]]
|
|-
|[[Iring]]
|2/1 (octave)
|[[600edo|1\600]]
|
|-
|[[Skisma]]
|2/1 (octave)
|[[612edo|1\612]]
|
|-
|[[Delfi]]
|2/1 (octave)
|[[665edo|1\665]]
|
|-
|[[Woolhouse]]
|2/1 (octave)
|[[730edo|1\730]]
|
|-
|[[millioctave]] (mO)
|2/1 (octave)
|[[1000edo|1\1000]]
|"Metric" / SI division of octave
|-
|[[cent]] (¢)
|2/1 (octave)
|1\1200
|1/100 of 12-ED2 semitone
|-
|greater muon
|2/1 (octave)
|[[1224edo|1\1224]]
|
|-
|triangular cent
|2/1 (octave)
|[[1260edo|1\1260]]
|
|-
|pion
|2/1 (octave)
|[[1272edo|1\1272]]
|
|-
|pound
|2/1 (octave)
|[[1344edo|1\1344]]
|
|-
|neutron
|2/1 (octave)
|[[1392edo|1\1392]]
|
|-
|lesser muon
|2/1 (octave)
|[[1428edo|1\1428]]
|
|-
|deciFarab
|2/1 (octave)
|[[1440edo|1\1440]]
|1/10 of Farab
|-
|quadratic cent
|2/1 (octave)
|[[1452edo|1\1452]]
|
|-
|ksion
|2/1 (octave)
|[[1476edo|1\1476]]
|
|-
|cubic cent
|2/1 (octave)
|[[1500edo|1\1500]]
|
|-
|7mu
|2/1 (octave)
|[[1536edo|1\1536]]
|
|-
|rhoon
|2/1 (octave)
|[[1560edo|1\1560]]
|
|-
|tile
|2/1 (octave)
|[[1632edo|1\1632]]
|
|-
|[[Iota]]
|2/1 (octave)
|[[1\1700_octave|1\1700]]
|
|-
|[[Harmos]]
|2/1 (octave)
|[[1728edo|1\1728]]
|
|-
|[[Mina]]
|2/1 (octave)
|[[2460edo|1\2460]]
|
|-
|[[Tina]]
|2/1 (octave)
|[[8539edo|1\8539]]
|
|-
|[[Purdal]]
|2/1 (octave)
|[[9900edo|1\9900]]
|
|-
|[[Türk_sent|Türk sent]]
|2/1 (octave)
|[[10600edo|1\10600]]
|
|-
|[[Prima]]
|2/1 (octave)
|[[12276edo|1\12276]]
|
|-
|[[Jinn]]
|2/1 (octave)
|[[16808edo|1\16808]]
|
|-
|[[Jot]]
|2/1 (octave)
|[[30103edo|1\30103]]
|
|-
|[[Imp]]
|2/1 (octave)
|[[31920edo|1\31920]]
|
|-
|[[Flu]]
|2/1 (octave)
|[[46032edo|1\46032]]
|
|-
|[[MIDI_Tuning_Standard_unit|MIDI Tuning Standard unit]]
|2/1 (octave)
|[[196608edo|1\196608]]
|fourteenth MIDI-resolution unit, 2<sup>14</sup> = 1/16384 of [[12edo|12ED]]2 semitone
|-
|[[Hekt]]
|3/1 (twelfth)
|1\1300
|1/100 of 13-ED3 (Bohlen-Pierce) scale step
|-
|[[Grad]]
|531441/524288 (Pythagorean comma)
|1\12
|
|-
|[[Tuning unit]]
|531441/524288 (Pythagorean comma)
|1\720
|
|}


See [http://www.huygens-fokker.org/docs/measures.html Logarithmic Interval Measures]
See [http://www.huygens-fokker.org/docs/measures.html Logarithmic Interval Measures]