Playing the piano should be an easy and freeing experience. In order for that to happen, your piano needs to be operating at peak condition. Felts wear out and get compacted over time, putting parts of the piano out of position. Regulation compensates for changes in the 10,000 parts in your piano due to wear, humidity or the ravages of time.
Alignment and lubrication of the keyboard, tightening of screws and alignment and adjustment of action parts are included. Regulation is typically sold by the job needed, or by the day.