Great find, but there's no transcription available, as far as I know. Paléographie Musicale XIII (1925) only has ff. 1-133r, which contain the graduale.
Does someone know of a transcription, or is able to transcribe the chant?
Gregem tuum is also transcribed in the 2015 Salterio Corale of the Abbazia di Praglia (p. 316). See the attachment. In de manuscripts, there are a couple of melodic traditions of this antiphon, all close together but still different in some respects. It seems that the monks of Praglia used a melody close to A-KN 1010, f. 94v. EDIT: So close! The index of the Salterio says A-KN 1013, f. 109v-110r
Vigilemus omnes can also be found in (alas, no digital scans): - Montserrat, Biblioteca de l’Abadia, ms. 72, p. 64 (12th century) - E-Bbc (Barcelona) E-Bbc, Ms. 619, f. 22r (14th century) - Cantoral del Convento de la Concepción de Palma de Mallorca, E-Pm, f. 28r (14th century)
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