It’s in G but Purcell flattens some of the F sharps to natural, which creates moments of minor, or modal, piquancy. Also it’s in compound time, with a time signature of 6/4, which gives it a lilting rhythm. I think it’s rather beautiful.
Never knew that you could play jazz on a concertina. Charles Wheatstone Please Register or Log in to view the hidden image! concertina, free-reed musical instrument patented by Sir Charles Wheatstone in London in 1829. Hexagonal hand bellows are fastened between two sets of boards that carry the reeds in fraised sockets, as well as the pallet valves and finger buttons, by which air is selectively admitted to the reeds.