FOOTNOTES
1 [01:10] See "Plainchant.": (ii) The origins of Gregorian chant. Grove Music Online. 23 Jan. 2018 [link].
2 [02:48] The St. Gallen manuscript shown on the video is Codex Sang. 339 [link]. Further manuscripts from that collection are available online here. Two other contemporary sources with more or less similar notation are Codex 239 Laon [link] and Codex 47 Chartres [link].
3 [03:14] In Codex Sang. 381 [link] there are explanations of the letters used along with the neumes.
4 [04:38] In the St. Gallen manuscript, along with the neumes, there are additional signs and letters signifying alteration of pitch, rhythm, agogic nuance or dynamic. See "Notation": III. History of Western notation, 1. Plainchant, (iv) Early notations, (h) Significative letters. Grove Music Online. Retrieved 3 Feb. 2018 [link].
5 [04:50] The examples shown on the video are from the following treatises: 1. Musica enchiriadis. Scolica enchiriadis. Boethius, De institutione musica. Martianus Capella, De nuptiis Philologiae et Mercurii (liber IX, am Schluss unvollständig) - Staatsbibliothek Bamberg Msc.Class.9 [link]; 2. Scolica enchiriadis de arte musica u.a. musiktheoretische Texte - Staatsbibliothek Bamberg Msc.Var.1 [link].
6 [05:03] Bibliothèque nationale de France, Département des manuscrits, Latin 776 [link]
7 [05:33] Graz, Universitätsbibliothek Ms. 807 [link].
8 [06:33] Bibliothèque nationale de France, Département des manuscrits, Latin 1112 [link].
9 [09:10] Giovanni Guidetti, Directorium chori ad usum omnium ecclesiarum, (ed. 1589 [link]; ed. 1618 [used in the video, link]). The new Roman gradual was published in 1614 (also called "The Medicaea") [link]. It was printed using different notation than the edition of Guidetti.
10 [10:16] Graduel de Paris (Paris, 1754) [link]
11 [10:24] François de La Feillée, Méthode nouvelle pour apprendre parfaitement les règles du plain chant (Paris, 1760) [link]. For further reading about the Neo-Gallican chant, in particular focus on rhythm, see the recent article by Christopher Holman, Rhythm and Metre in French Classical Plainchant. (Early Music, cax087 [link])
12 [11:39] The latest accepted version of the chants before the versions of Solemnes was approved by Pope Pius IX; it was a reprinted version of the 17th century Medicea edition (Pustet: Regensburg, 1871) [link].
13 [12:16] Paléographie Musicale: publications from 1889 to 1983 [Wikipedia in German]. [Link to the reproductions of almost all of the volumes]
14 [15:07] See our video about modes in the 16th and 17th centuries.
15 [15:57] The performance shown in the video is by Ensemble PHOENIX, 2008, Israel [Youtube link]