Technicians use many different terms for this process: Double or Triple Tuning, Tension Adjustment and Pitch Raise all mean the same thing, and that is this:
Your piano is designed to sound its best when tuned to A-440 (when the A above middle C vibrates 440 times per second). When your piano varies from A-440, pitch adjustments are required to bring it back to standard.
If a piano has gone without tuning for an extended period, its pitch may have dropped far below A-440.
As a conscientious piano owner, you probably have your piano tuned regularly by a qualified technician. You may, however, notice a deterioration of its performance despite regular tuning. It's important to note that tuning is only the adjustment of the system of strings and pins that determines the pitch of each string. Your piano also requires a periodic servicing called regulation, which attends to the mechanical parts that cause strings to sound when keys are played and af