Why It’s Important to Tune Your Piano — New York Piano Works : 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 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. When pianos are tuned regularly, they are easier to tune, stay in good condition, and maintain their value. Piano tuning regularly also avoids damage caused by overstretched strings. It will be more expensive and ...