why does my piano go out of tune?

The primary reason the piano goes out of tune – change of pitch, is due to contraction and expansion of the strings. Reason for this is temperature variation – atmospheric variations, particularly humidity. When the tension in a string changes, the pitch will also change, resulting in a note that is out of tune. Tuning pins can lose tension and slip, thus allowing movement of the strings effecting the tuning of the piano. Check out the services we provide for piano tuning in London