Periodically your piano will require the adjustment of its mechanical parts to compensate for wear and to keep it functioning at its optimum. These adjustments are called regulation. Because a piano goes out of regulation slowly over time, you may not notice the accumulating sluggishness or uneven performance as it occurs. A well-regulated piano will reward you with a smooth, quick and accurate touch.
Adjusting the piano for an even gradation of volume and tone over the entire range of the keyboard is called voicing. Reshaping worn hammers and needling hammer felt are common procedures used to get the optimal sound from the piano. Your piano may need periodic voicing and this is best done in conjunction with tuning and regulation.