PIANO TUNING AND MAINTENANCE
If your piano has been regularly tuned (yearly) it should be up to concert pitch and will only need a fine tune. This takes one and a quarter hours.
If it has been much more than a year since your last tuning, your piano may need a pitch raise. This usually takes up to two hours.
Over time, the mechanism inside the piano becomes slacker due to wearing of parts and compression of felt. This slack can be adjusted for by regulation (tightening of the mechanism).