Action parts need periodic adjustment to compensate for wear and changes in atmospheric conditions. Making these adjustments is called regulating.Sometimes playing certain notes on your piano just doesn’t feel right. Keys will stick. Hammers will double-strike or not strike at all. Strings will continue to sound after you have released the key. These are all symptoms that your piano needs regulation.
Most new and rebuilt pianoswill need to be regulated to some extent within six months to a year of purchase because of initial settling of cloth parts. Thereafter the frequency of regulation will depend upon the amount of use.A piano in a home played an hour a day might need a full regulation only once every five to ten years, whereas one played all day by a professional might benefit from a full regulation every year.
The cost depends upon the amount of adjusting needed to be made.