How Does A Piano Get Out Of Tune?

Constant changes in the atmosphere will affect your piano. The wood in the soundboard, pin block, and bridges continually change, swelling when it is humid, shrinking when it is dry. This phenomenon, combined with the tension pulling the piano together, causes the strings to stretch and contract. Some strings stretch at a different rate than others. This is how your piano goes out of tune.

© Joel Klar 2013