How many natural frequencies does a piano have?

A piano typically has a large number of natural frequencies due to the multitude of strings it contains. Each string can vibrate at multiple frequencies, corresponding to its fundamental frequency and various harmonics. In total, a standard piano, which usually has 88 keys, can produce hundreds of natural frequencies when considering all the strings and their harmonic series. Thus, the exact number of natural frequencies depends on the specific tuning and configuration of the piano.