It is a fact that a piano will go out of tune whether it is played or not, due mainly to the constant variations in heat and humidity in the home.

Have your piano tuned as often as you feel necessary, but a minimum of twice yearly.

Your piano should be tuned to Concert Pitch (A 440) to sound its best. Concert pitch A 440 (A above middle C vibrating at 440 times per second) has been universally accepted as the pitch to which all instruments should be tuned.

Loss of string tension caused by tuning neglect will ultimately result in a drop in pitch. A second and sometimes a third tuning may be required to establish A 440 and at the same time provide a stabilized tuning.