"[Tonality is the] set of relationships, simultaneous or successive, among the tones of the scale."

"In the passage quoted here from Monteverdi's madrigal [Cruda amarilli, mm.9-19 and 24-30], one sees a tonality determ…"

"For the elements of music, nature provides nothing but a multitude of tones differing in pitch, duration, and intensi…"

"But one will say, 'What is the principal behind these scales, and what, if not acoustic phenomena and the laws of mat…"

"[Tonality is] the art of combining tones in such successions and such harmonies or successions of harmonies, that the…"

"Tonality is the organized relationship of musical sounds, as perceived and interpreted with respect to some central p…"

"[Tonality is] prolonged motion within the framework of a single key-determined progression."

"[Tonality is] contrapuntal progressions … can be key defining and capable of assuming structural significance."

"[Tonality is] directed motion within the framework of a single prolonged sonority."

"The inception of the principle of tonality and certain of its techniques expressing themselves in the construction of…"