TempoCalculation

This is a misunderstanding! The percentage doesn't show relation to original tempo. It shows the swing, i.e. the relation of the number of ticks of even steps divided with the number of ticks for playing two steps. 66% comes from 6/(6+3). Recalculating tempo should be done by multiplying with (6+3)/(6+6) = 9/12 = 3/4 = 75% . /Johan