As this manuscript contains the Old Roman repertory of liturgical chant, its differentiae are not part of the octomodal system. In the original Cantus index for this manuscript, differentiae were assigned a letter-number code to indicate the last note of the differentiae within each of the Roman species. For more on this, see the manuscript description on Cantus.
Please note that some of the exemplar images contain 'extra' initial pitches that are not part of the differentia itself, which is only made up of the last six syllables.
Mitchell, Andrew. Inventory of Città del Vaticano (Roma), Biblioteca Apostolica Vaticana, San Pietro B.79. Edited by Debra Lacoste. In: Cantus: A Database for Latin Ecclesiastical Chant: Inventories of Chant Sources. Directed by Debra Lacoste (2011-), Terence Bailey (1997-2010), and Ruth Steiner (1987-1996). Web developer, Jan Kolácek (2011-).
Images: Arch.Cap.S.Pietro.B.79, Biblioteca Apostolica Vaticana, DigiVatLib
Standardized manuscript tonary completed by Rebecca Shaw (Dalhousie University) on April 13, 2018. Edited by Jennifer Bain, Sister Ilaria Culshaw, and Lucia Denk (Dalhousie University) on July 24, 2019 and Rebecca Shaw on August 7, 2019.