Regulation A well-regulated instrument offers the pianist faster repetition, more power, and better control. Techniques for performing advanced piano repertoire are difficult to develop if the action has excessive friction or an inconsistent touch from note to note. When a piano is built, action parts are regulated to factory specifications. After years of playing, the felts compress and the regulating screws and springs need to be adjusted again in order to restore the ideal touch or response of the action. It can be surprising what a difference a proper regulation can make in your expression and the general feel of your piano. If you instrument displays a lack of sensitivity or a decreased dynamic ranges, it's a candidate for regulation. If you notice that the keys are not level...some higher/lower than the rest, the touch is uneven or that the keys are sticking, you probably need a regulation. However, sluggish action or deep grooves in the hammers indicate the need for reconditioning or repair.