Fine Tuning
Regular tunings are important for the piano to sound its best, regardless of whether it is played often or not. Piano manufacturers recommend tuning your piano a least every six months.
Pitch Raising
Most musical instruments are designed and built to optimally perform and sound their best when tuned to the industry standard of A-440. With the passage of time between tunings the pitch of the piano may fall flat. In most cases a double tuning is required to bring the piano back to concert pitch.