Pitch

in music the character of a sound which is dependent on the frequency of the vibrations of the sounding body. The standard pitch adopted by scientists is that of a tone produced by a string vibrating 256 times per second for lower C, or 512 vibrations for upper C, being the eighth and ninth powers respectively of 2. Musicians have, however, decided that better and more brilliant effects are produced by sharpening to a concert pitch, which, for upper C, is placed in England at 538 vibrations per second; in France, at 522; and in Germany, at 528. See Sound