Music from the Earliest Notations to the Sixteenth Century

6 For a summary of this controversy and a bibliography, see Kenneth Levy, “On Gregorian Orality,” Journal of the American
Musicological Society XLIII (1990): 185–227. The article, but not the bibliography, is reprinted in K. Levy, Gregorian Chant and the
Carolingians (Princeton, N.J.: Princeton University Press, 1998), pp. 141–77. See also James McKinnon, The Advent Project: The
Later-Seventh-Century Creation of the Roman Mass Proper (Berkeley and Los Angeles: University of California Press, 2000).