This would likely be referring to the harmonics of the piano. Tuning a piano involves adjusting the tension of the strings to ensure that the harmonics are in tune with each other, creating a more pleasing and accurate sound.
IS THIS Beat Frequency, harmonics, or resonant frequency.
This would likely refer to the resonant frequency of the piano. Resonant frequency is the natural frequency at which an object vibrates most easily and with the most energy. Adjusting the tension of the strings in a piano to match its resonant frequency can help improve the overall sound quality.
