Wholescale adjustments to all action parts to maximize efficiency
Mechanically, piano parts wear out over time. The wood, felt, and metal components that help each part move can change, creating more work for the fingers of the player. Dynamic possibilities diminish; it is more difficult to play, both loud and soft. Piano regulation means increasing the efficiency and consistency of every action component. Adjusting the starting and stopping point of the keys and hammers, reducing any excessive friction, minimalizing unnecessary hang-ups, all help increase the energy transfer from key to hammer to get the best possible ‘feel.’ Piano manufacturers recommend regulations every 10 years, but will ultimately depend on the prior service and use.