53edo: Difference between revisions

Godtone (talk | contribs)
m Theory: include more harmonics and offer short explanation on their possible value
Move higher-limit JI to the approximation section
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=== Prime harmonics ===
=== Prime harmonics ===
{{Harmonics in equal|53|columns=13}}
{{Harmonics in equal|53|columns=13}}
There's also a cluster of usable higher primes starting at 71; even 89 (4.84{{cent}} flat), 97 (4.63{{cent}} sharp) and 101 (2.6{{cent}} sharp) are usable if placed in just the right context.
{{Harmonics in equal|53|columns=4|start=20}}
This make [[53edo]] excellent (for its size) in the 2.3.5.7.11.13.19.23.37.41.71.73.79.83 subgroup, although some higher error primes like 11 and 23 require the right context to be convincing.
Note that the high primes, in rooted (/2<sup>n</sup>) position, essentially act as alternate interpretations of [[LCJI]] intervals, if you want to force a rooted interpretation; namely:


[[71/64]] as ~[[10/9]], [[73/64]] as ~[[8/7]], [[79/64]] as ~[[16/13]], and perhaps most questionably in the context of [[53edo]], [[83/64]] as ~[[13/10]]. (Note that [[8edo]] offers a very good approximation of [[83/64]], so if you are working with a system that maps 13/10 to 3\8 = 450.000{{cent}} it makes more sense to think of 83/64 as the rooted approximation of 13/10 in that context.)
=== Subsets and supersets ===
=== Subsets and supersets ===
53edo is the 16th [[prime edo]], following [[47edo]] and coming before [[59edo]].
53edo is the 16th [[prime edo]], following [[47edo]] and coming before [[59edo]].
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[[File:53-edo spiral.png|588x588px]]
[[File:53-edo spiral.png|588x588px]]


== JI approximation ==
== Approximation to JI ==
53edo provides excellent approximations for the classic 5-limit [[just]] chords and scales, such as the Ptolemy-Zarlino "just major" scale.
53edo provides excellent approximations for the classic 5-limit [[just]] chords and scales, such as the Ptolemy-Zarlino "just major" scale.


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{{15-odd-limit|53}}
{{15-odd-limit|53}}
=== Higher-limit JI ===
There is also a cluster of usable higher primes starting at 71; even 89 (4.84{{cent}} flat), 97 (4.63{{cent}} sharp) and 101 (2.6{{cent}} sharp) are usable if placed in just the right context.
{{Harmonics in equal|53|columns=4|start=20}}
This make [[53edo]] excellent (for its size) in the 2.3.5.7.11.13.19.23.37.41.71.73.79.83 subgroup, although some higher error primes like 11 and 23 require the right context to be convincing.
Note that the high primes, in rooted (/2<sup>n</sup>) position, essentially act as alternate interpretations of [[LCJI]] intervals, if you want to force a rooted interpretation; namely:
[[71/64]] as ~[[10/9]], [[73/64]] as ~[[8/7]], [[79/64]] as ~[[16/13]], and perhaps most questionably in the context of 53edo, [[83/64]] as ~[[13/10]]. (Note that [[8edo]] offers a very good approximation of [[83/64]], so if you are working with a system that maps 13/10 to 3\8 = 450.000{{cent}} it makes more sense to think of 83/64 as the rooted approximation of 13/10 in that context.)


== Regular temperament properties ==
== Regular temperament properties ==