21edo: Difference between revisions

@@ Line 17: / Line 17: @@
 ==Theory==
-{| class="wikitable center-all"
+{{Primes in edo|21|columns=9}}
-! colspan="2" | <!-- empty cell -->
-! prime 2
-! prime 3
-! prime 5
-! prime 7
-! prime 11
-! prime 13
-! prime 17
-! prime 19
-|-
-! rowspan="2" | Error
-! absolute (¢)
-| 0.0
-| -16.2
-| +13.7
-| +2.6
-| +20.1
-| +16.6
-| +9.3
-| -11.8
-|-
-! [[Relative error|relative]] (%)
-| 0
-| -28
-| +24
-| +5
-| +35
-| +29
-| +16
-| -21
-|-
-! colspan="2" | [[nearest edomapping]]
-| 21
-| 12
-| 7
-| 17
-| 10
-| 15
-| 2
-| 5
-|}
 -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 968.826 cents is only off in 21-tone by 2.6 cents, which is better than any other EDO &lt;26.