Hucbald, Frankish monk and music theorist
Hucbald (c. 850 – 20 June 930; also Hucbaldus or Hubaldus) was a Benedictine monk active as a music theorist, poet, composer, teacher, and hagiographer. He was long associated with the Saint-Amand Abbey, so is often known as Hucbald of St Amand. Deeply influenced by Boethius' De Institutione Musica, Hucbald's (De) Musica, formerly known as De harmonica institutione, aims at reconciling through many notated examples ancient Greek music theory and the contemporary practice of Gregorian chant. Among the leading music theorists of the Carolingian era, he was likely a near contemporary of fellow theorist Aurelian of Réôme, the unknown author of the Musica enchiriadis, as well as the anonymous authors of other music theory texts Commemeratio brevis, Alia musica and De modis.