Go and listen to some morris dancers. The tunes should be played at the same speed and rhythm as the dancers dance, which varies with dance, aspirations and age of dancers, time of day and quality of pub. The fiddle must be detuned by about half a notch, and concertina players just press all the keys at once and squeeze in and out as hard as possible. It is an offence for melodeon players to remember all the tune, and the rule for pipe and tabor is let not the left hand know.