What make an "A part" an "A part" and why do performers often start with the "B part"?
I have noticed that, while most any tabs I've seen tend to agree on the order (and I may just be projecting here) when I listen to recordings posted here there are lots of cases where the performer starts with a different part than most others.
I know that there are no objective "rules" in banjo playing, but is there a theory?