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| == Intervals ==
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| Given the size of the subfourth generator ''g'', any oneirotonic interval can easily be found by noting what multiple of ''g'' it is, and multiplying the size by the number of generators it takes to reach the interval and reducing mod 1200 if necessary. For example, since the major oneirothird is reached by six subfourth generators, [[18edo]]'s major oneirothird is 6*466.67 mod 1200 = 2800 mod 1200 = 400¢, same as the [[12edo]] major third.
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| {| class="wikitable center-all"
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| |-
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| ! Generators
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| ! Notation (1/1 = J)
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| ! Octatonic interval category name
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| ! Generators
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| ! Notation of 2/1 inverse
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| ! Octatonic interval category name
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| |-
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| | colspan="6" style="text-align:left" | The 8-note MOS has the following intervals (from some root):
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| |-
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| | 0
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| | J
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| | perfect unison
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| | 0
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| | J
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| | octave
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| |-
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| | 1
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| | M
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| | perfect oneirofourth (aka minor fourth, falling fourth)
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| | -1
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| | O
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| | perfect oneirosixth (aka major fifth, rising fifth)
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| |-
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| | 2
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| | P
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| | major oneiroseventh
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| | -2
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| | L
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| | minor oneirothird
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| |-
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| | 3
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| | K
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| | major oneirosecond
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| | -3
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| | Q
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| | minor oneiroeighth
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| |-
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| | 4
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| | N
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| | major oneirofifth (aka minor fifth, falling fifth)
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| | -4
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| | N@
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| | minor oneirofifth (aka major fourth, rising fourth)
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| |-
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| | 5
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| | Q&
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| | major oneiroeighth
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| | -5
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| | K@
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| | minor oneirosecond
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| |-
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| | 6
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| | L&
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| | major oneirothird
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| | -6
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| | P@
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| | minor oneiroseventh
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| |-
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| | 7
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| | O&
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| | augmented oneirosixth
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| | -7
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| | M@
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| | diminished oneirofourth
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| |-
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| | colspan="6" style="text-align:left" | The chromatic 13-note MOS (either [[5L 8s]] or [[8L 5s]]) also has the following intervals (from some root):
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| |-
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| | 8
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| | J&
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| | augmented oneirounison (aka oneirochroma)
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| | -8
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| | J@
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| | diminished oneirooctave (aka diminished oneironinth)
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| |-
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| | 9
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| | M&
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| | augmented oneirofourth
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| | -9
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| | O@
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| | diminished oneirosixth
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| |-
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| | 10
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| | P&
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| | augmented oneiroseventh
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| | -10
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| | L@
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| | diminished oneirothird
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| |-
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| | 11
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| | K&
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| | augmented oneirosecond
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| | -11
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| | Q@
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| | diminished oneiroeighth
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| |-
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| | 12
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| | N&
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| | augmented oneirofifth
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| | -12
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| | N@@
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| | diminished oneirofifth
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| |}
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| == Key signatures == | | == Key signatures == |