Here's a two part question for historians and performers. 1) At what period did it become codified for fiddle tunes to be played twice through the first part and then twice through the second part (AA:BB), and why ? Was it to facilitate dancing, or make the tunes more musical ??

2) Is there a standard way to sing verse & chorus, which are A & B and make them fit into the AA:BB format on tunes like "Turkey in the Straw" "Old Joe Clark" etc. I realize that if you're playing with a "rehearsed" group, one can work this out, but it seems like every time I'm in a jam with a loose group of fiddlers, banjo players, etc. it gets all balled up about how to make it all come out. I've tried saying "one A & one B on the singing" and also tried singing on the 2nd A & 1st B, and also singing two verses for AA and then doubling up the chorus, BB. But is there a standard way ??