A huge step forward compared to the Medici edition is the Antiphonale Monasticum, published in 1934 under the care of the Salesian monks. *V. CORALE* and *NOTAZIONE MUSICALE*.
BIBL.: Amalarius of Metz, *Liber de ordine Antiphonæ*: PL 105; Agobard of Lyon, *De correctione Antiphonæ*: PL 104; A. Gevaert, *Les origines du chant liturgique de l'Église latine*, Ghent 1890; G. Morin, *Les véritables origines du chant grégorien*, Maredsous 1890; A. Gastoué, *Le Graduel et l'Antiphonaire romains*, Lyon 1913; J. Baudot, *L'Antiphonaire*, Paris 1913; F. Cabrol, *Les livres de la liturgie latine*, Paris 1930; P. Alfonzo, *L'Antiphonaire dell'Ufficio Romano*, Subiaco 1935; R. J. Hesbert, *Antiphonale missarum sextuplex*, Brussels 1935. Cf. also *La Paléographie musicale*, a phototypic edition of many Gregorian manuscripts, edited by the monks of Solesmes (from 1890 onwards). Pelagio Visentin.