Body resonance also -- which provides most of the color of an instrument's sound. For example, middle C on an electric bass guitar (which sounds at 130.8 Hz) of

Body resonance also -- which provides most of the color of an instrument's sound. For example, middle C on an electric bass guitar (which sounds at 130.8 Hz) often sounds "honky" or "thunky" -- this is due to a null in the body resonance. (Not all bass guitars exhibit this.)