This is the first complete survey of the historical pitch standards used by musicians during the last four centuries. Written from a practical perspective and addressed to performers it is the first book to attach frequency values to pitch names and describe where, when, and why various historical pitch levels were used. It surveys a period from the 16th century to the present and focuses on Italy, France, Germany, the northern and southern Netherlands, and the Habsburg Lands, following the developments in the design and function of instruments and how they influenced and were influenced by pitch changes.