21edo: Difference between revisions
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{{EDO intro|21}} | {{EDO intro|21}} | ||
== Theory == | == Theory == | ||
{{ | {{Harmonics in equal|steps=21|columns=14}} | ||
21 EDO provides both 7 EDO as a subset and the familiar 400-cent major third, while also giving some higher-limit JI possibilities. The system can be treated as three intertwining 7 EDO or "equi-heptatonic" scales, or as seven 3 EDO ''augmented'' triads. The 7/4 at 971.43¢ is only off in 21 EDO by 2.60 cents from just (968.83¢), which is better than any other EDO <26. | 21 EDO provides both 7 EDO as a subset and the familiar 400-cent major third, while also giving some higher-limit JI possibilities. The system can be treated as three intertwining 7 EDO or "equi-heptatonic" scales, or as seven 3 EDO ''augmented'' triads. The 7/4 at 971.43¢ is only off in 21 EDO by 2.60 cents from just (968.83¢), which is better than any other EDO <26. | ||