Highly melodic EDF: Difference between revisions

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Highly Melodic EDFs are equal division scales with a superabundant or a highly composite number of pitches in a [[perfect fifth]] (3/2).
#REDIRECT [[Highly composite equal division#Highly composite EDF]]
 
Unlike [[highly melodic EDO]]<nowiki/>s, whose harmonic content tends to be random and usually contorted, highly melodic EDFs often correspond to a useful EDO.
 
== Highly melodic EDF-EDO correspondence ==
The following is a table of first 19 highly melodic EDFs and their corresponding EDOs, since first 19 superabundant and highly composite numbers are the same.-
{| class="wikitable"
|+Table of first highly melodic EDF-EDO correspondences
!EDF
!EDO
!log2/log1.5*EDF
(exact EDO)
!Comments
|-
|1
|2
|1.7095112
|Trivial
|-
|2
|3
|3.4190226
|Completely misses the octave.
|-
|4
|[[7edo|7]]
|6.8380452
|
|-
|6
|10
|10.257068
|10edo, but with a heavy stretch
|-
|12
| -
|20.514135
|Completely misses the octave
|-
|24
|[[41edo|41]]
|41.028271
|24edf is equivalent to 41edo. Patent vals match through the 19-limit.
|-
|36
| -
|61.542406
|
|-
|48
|[[82edo|82]]
|82.056542
|48edf is equivalent to 82edo.
|-
|60
|[[103edo|103]]
|102.57067
|Surprisingly, it's a match to 103edo despite 60edf falling halfway between 102 and 103.
|-
|120
|[[205edo|205]]
|205.14135
|
|-
|180
|[[308edo|308]]
|307.71203
|Corresponds to 308edo, but with quite a stretch.
|-
|240
|[[410edo|410]]
|410.28271
|
|-
|360
| -
|615.42406
|Falls halfway between 615 and 616edo. Also, one step is quite close to the [[schisma]].
|-
|720
|[[1231edo|1231]]
|1230.8481
|
|-
|840
|[[1436edo|1436]]
|1435.9895
|
|-
|1260
|2154
|2153.9842
|
|-
|1680
|2872
|2871.9789
|
|-
|2520
|4308
|4397.9685
|
|-
|5040
|8616
|8615.9369
|
|}
 
== Possible usage in Georgian (Kartvelian) music ==
Since [[Kartvelian scales]] are created by dividing the perfect fifth into an arbitrary number of steps, and complementing that with dividing 4/3 into an arbitrary number of steps, EDOs which correspond to highly melodic EDFs have a high density of such scales per their size.

Latest revision as of 04:22, 21 October 2022