2afdo: Difference between revisions
CompactStar (talk | contribs) Created page with "'''2ado''', if the attempt is made to use it as an actual scale, would divide the octave into two arithmetically equal parts. The only intervals in it are 1/1 and the..." |
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''' | {{Infobox AFDO|steps=2}} | ||
'''2afdo''' ([[AFDO|arithmetic frequency division of the octave]]), or '''2odo''' ([[otonal division]] of the octave), if the attempt is made to use it as an actual [[tuning system]], would divide the [[octave]] into two arithmetically equal parts. It is a superset of 1afdo (equivalent to [[1edo]]) and a subset of [[3afdo]]. It is equivalent to [[IFDO|2ifdo]] (2 inverse-arithmetic frequency divisions of the octave), and to the [[1L 1s|monowood]] [[mos scale]] tuned to the just perfect fifth or just perfect fourth. As a [[scale]] it may also be known as [[harmonic mode|mode 2 of the harmonic series]] or the [[overtone scale #Over-n scales|Over-2]] scale. The only non-trivial intervals are the just perfect fifth [[3/2]], since 3/2 is arithmetically halfway between 1/1 and 2/1, and its [[octave complement]] [[4/3]]. | |||
== Intervals == | == Intervals == | ||
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! # | ! # | ||
! Cents | ! Cents | ||
! Ratio | |||
! Decimal | |||
! Interval name | |||
! Audio | |||
|- | |||
| 0 | |||
| 0.0 | |||
| [[1/1]] | |||
| 1.0000 | |||
| perfect unison | |||
| | |||
|- | |- | ||
| 1 | | 1 | ||
| | | 702.0 | ||
| [[3/2]] | |||
| 1.5000 | |||
| just perfect fifth | |||
| [[File:Jid_3_2_pluck_adu_dr220.mp3]] | |||
|- | |- | ||
| 2 | | 2 | ||
| | | 1200.0 | ||
| [[2/1]] | |||
| 2.0000 | |||
| perfect octave | |||
| [[File:Jid_2_1_pluck_adu_dr220.mp3]] | |||
|} | |} | ||
[[Category: | [[Category:IFDO|#]] | ||