Near the end of the keystroke, the hammer must release from the driving force and fly free to strike the string. If this “escapement” is not properly adjusted, the hammer can block against the string making a very unmusical sound or a note that goes “bonk.” The opposite situation of escapement occurring too early dramatically reduces the dynamic range available to the pianist. Either situation accelerates the wear and deterioration of the action parts. Maintaining proper action regulation will make playing your piano more fun and extend the life of your piano.