A piano key assembly for a pianoforte in which weights are mounted on a keystick to have a center of gravity between a first point along said keystick halfway between the pivot point of the keystick and the end struck by the pianist and a second point halfway between the pivot point and the first point and wherein all the weights are located relative to the keystick between the pivot point and the first point. Optionally, holes are made in the keystick between the first point and the end struck by the pianist.