21st-octave temperaments

This page collectes temperaments with a period of 1/21 of an octave.

Although 21edo itself is not remarkably accurate for low-complexity harmonics, some temperaments which are multiples of 21, such as 441, 1407, and 1848 are.

Akjayland

Main article: Landscape microtemperaments#Akjayland

Subgroup: 2.3.5.7

Comma list: 250047/250000, [43 -1 -13 -4⟩

Mapping: [⟨21 1 38 102], ⟨0 3 1 -4]]

Mapping generators: ~1323/1280, ~131072/91875

POTE generator: ~131072/91875 = 614.9361

Optimal GPV sequence: Template:Val list

Badness: 0.0309