Crawma
Crawma, known as the crawma, is a 19-limit (more precisely, 2.17/13.19/13 subgroup) unnoticeable comma. It forms the difference between a stack of four 17/13's and a stack of one octave and one 19/13.
| Interval information |
Nuquadso-atrithu comma
Temperaments
Tempering out this comma in the 19-limit leads to the rank-7 crawmic temperament, or in the 2.17/13.19/13 subgroup, the rank-2 crawic temperament generated by a tempered 17/13.
Terminology
The name crawma was proposed by ground fault as a more distinctive-sounding crow-related name for the comma than "cawma". The word craw has an archaic sense 'to caw, to croak, to crow'.