What did a Dance Master from Irish culture do?

Explanation:

Old-style step dancing The dance masters slowly formalized and transformed both solo and social dances. Modern masters of old-style step dancing style can trace the lineage of their steps directly back to 18th century dancers. The Irish dance masters refined and codified indigenous Irish dance traditions.

irish set dancing (also referred to as "country set dancing") are dances based on French quadrilles that were adapted by the Irish by integrating their sean-nós steps and Irish music. ... Each part of the set dance (figure) is danced to a music tempo, mostly reels, jigs, polkas and hornpipes.

Explanation:

12-bar blues chorus = a a b