Thanks Dave, I'm going with a yes. Yes the accordion plays minors. The song pieces (of my heart ) 1645 by Keith frank the 6 is a minor. We call that progression, cherry pie.
My rule is now, when a 2 or a 6 is played assume it is a minor .
I pulled the two songs (on the rise) one I hear 1 and quick 5 , the other almost the same ,one chord and quick same minor. Thank you I'm gunna try the quick same minor in those one chord zydeco songs now on.