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=Edo=
== Edo ==
An '''equal division of the octave''' ('''edo''' or '''EDO''') is a [[Musical tuning|tuning system]] constructed by dividing the [[octave]] in a certain number of [[Equal-step tuning|equal steps]].
An '''equal division of the octave''' ('''edo''' or '''EDO''') is a [[Musical tuning|tuning system]] constructed by dividing the [[octave]] in a certain number of [[Equal-step tuning|equal steps]].


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An edo being an [[equal-step tuning]], it is also an [[Arithmetic tunings|arithmetic]] and a [[Harmonotonic tunings|harmonotonic]] tuning.
An edo being an [[equal-step tuning]], it is also an [[Arithmetic tunings|arithmetic]] and a [[Harmonotonic tunings|harmonotonic]] tuning.


== History ==
=== History ===
For a long time, theorists used the term "equal temperament" for edos designed to approximate low-complexity just intervals. The same term is still used today to designate more generally all rank-1 [[Regular temperament|temperaments]]. For example, [[15edo]] can be referred to as 15-tone equal temperament (15-TET, 15-tET, 15tet, etc.), or more simply 15 equal temperament (15-ET, 15et, etc.).
For a long time, tuning theorists used the term "equal temperament" for edos designed to approximate low-complexity just intervals. The same term is still used today to designate more generally all rank-1 [[Regular temperament|temperaments]]. For example, [[15edo]] can be referred to as 15-tone equal temperament (15-TET, 15-tET, 15tet, etc.), or more simply 15 equal temperament (15-ET, 15et, etc.).


The acronym "EDO" (''EE-dee-oh'') was coined by [[Daniel Anthony Stearns]]<sup>[''year needed'']</sup>. Since then, the [https://en.wikipedia.org/w/index.php?title=Anacronym anacronym] "edo" (''EE-doh''), spelled in lowercase, has become increasingly widespread.
The acronym "EDO" (''EE-dee-oh'') was coined by [[Daniel Anthony Stearns]]<sup>[''year needed'']</sup>. Since then, the [https://en.wikipedia.org/w/index.php?title=Anacronym anacronym] "edo" (''EE-doh''), spelled in lowercase, has become increasingly widespread.
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A few more alternate notations have been devised by some musicians more recently, including "edd" or "EDD" (equal divisions of the [[Ditave]]), "DIV," and "EQ."
A few more alternate notations have been devised by some musicians more recently, including "edd" or "EDD" (equal divisions of the [[Ditave]]), "DIV," and "EQ."
=== Infoboxes ===
{{Infobox ET
| Prime factorization = 2 × 3</sup>
| Step size = 200¢
| Fifth = 4\6 = 800¢
| Major 2nd = 2\6 = 400¢
| Minor 2nd = -2\6 = -400¢
| Augmented 1sn = 4\6 = 800¢
}}
{{Infobox ET
| Prime factorization = 2<sup>2</sup>
| Step size = 300¢
| Fifth = 2\4 = 600¢
| Major 2nd = 0\4 = 0¢
| Minor 2nd = 2\4 = 600¢
| Augmented 1sn = -2\4 = -600¢
}}
{{Infobox ET
| Prime factorization = 3 (prime)
| Step size = 400¢
| Fifth = 2\3 = 800¢
| Major 2nd = 1\3 = 400¢
| Minor 2nd = -1\3 = 400¢
| Augmented 1sn = 1\3 = -400¢
}}
{{Infobox ET
| Prime factorization = 2 (prime)
| Step size = 600¢
| Fifth = 1\2 = 600¢
| Major 2nd = 0\2 = 0¢
| Minor 2nd = 1\2 = 600¢
| Augmented 1sn = -1\2 = -600¢
}}

Revision as of 16:53, 12 July 2021

Edo

An equal division of the octave (edo or EDO) is a tuning system constructed by dividing the octave in a certain number of equal steps.

A tuning with n equal divisions of the octave is usually called "nedo" or "n-EDO." For instance, the predominant tuning system in the world today is 12edo or 12-EDO.

An edo being an equal-step tuning, it is also an arithmetic and a harmonotonic tuning.

History

For a long time, tuning theorists used the term "equal temperament" for edos designed to approximate low-complexity just intervals. The same term is still used today to designate more generally all rank-1 temperaments. For example, 15edo can be referred to as 15-tone equal temperament (15-TET, 15-tET, 15tet, etc.), or more simply 15 equal temperament (15-ET, 15et, etc.).

The acronym "EDO" (EE-dee-oh) was coined by Daniel Anthony Stearns[year needed]. Since then, the anacronym "edo" (EE-doh), spelled in lowercase, has become increasingly widespread.

With the development of equal divisions of non-octave intervals (edonoi), some musicians started using "ed2" or "ED2" in place of "edo" or "EDO," especially when naming a specific tuning.

A few more alternate notations have been devised by some musicians more recently, including "edd" or "EDD" (equal divisions of the Ditave), "DIV," and "EQ."

Infoboxes

← 11edo Sandbox 13edo →
Prime factorization 2 × 3
Step size 100 ¢ (by definition) 
Fifth 7\12 (700 ¢)
(convergent)
Semitones (A1:m2) 1:1 (100 ¢ : 100 ¢)
Consistency limit 9
Distinct consistency limit 5
Special properties
← 11edo Sandbox 13edo →
Prime factorization 22
Step size 100 ¢ (by definition) 
Fifth 7\12 (700 ¢)
(convergent)
Semitones (A1:m2) 1:1 (100 ¢ : 100 ¢)
Consistency limit 9
Distinct consistency limit 5
Special properties
← 11edo Sandbox 13edo →
Prime factorization 3 (prime)
Step size 100 ¢ (by definition) 
Fifth 7\12 (700 ¢)
(convergent)
Semitones (A1:m2) 1:1 (100 ¢ : 100 ¢)
Consistency limit 9
Distinct consistency limit 5
Special properties
← 11edo Sandbox 13edo →
Prime factorization 2 (prime)
Step size 100 ¢ (by definition) 
Fifth 7\12 (700 ¢)
(convergent)
Semitones (A1:m2) 1:1 (100 ¢ : 100 ¢)
Consistency limit 9
Distinct consistency limit 5
Special properties