There are around 230 strings on the average piano. Each string on the piano has a unique pitch and frequency that must be tuned to the other strings. The sound quality of your piano is determined by these strings, so they must be maintained properly. Due to stress, these strings can stretch over time, causing the piano to become out of tune. Seasonal Changes in humidity also cause the piano to become out of tune.

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 is the optimization of the mechanical parts of the piano to provide the best response to touch.