A-team

A-Team is a 2.9.21 temperament generated by a tempered 21/16 where 9 is tuned ~3.91 to ~19.295 cents flat and 21 is tuned ~4.11 to ~9.24 cents flat, following whence 7:3 is tuned ~.2 cents flat to ~10.055 cents sharp. Three 21/16's are equated to one 9/8, which means that the comma 1029/1024 is tempered out. It's natural to equate two 9/8's with one 5/4, tempering out 81/80 and making A-Team a 2.9.21.5 temperament. 13edo, 18edo, and 31edo all support A-Team; 31edo is a nearly optimal tuning for the 2.9.21.5 subgroup interpretation, with the 21/16 generator less than .13 cents flatter than the POTE generator.

Its name is a pun on the 18 notes in its proper scale, which is a 13L 5s MOS.