The minor thirds tuning is incidentally the same setup as chromatic button accordions (a.k.a. Bayan's)! https://en.wikipedia.org/wiki/Bayan_(accordion) https:/

The minor thirds tuning is incidentally the same setup as chromatic button accordions (a.k.a. Bayan's)! https://en.wikipedia.org/wiki/Bayan_(accordion) https://en.wikipedia.org/wiki/Bayan_(accordion)