Odo of Arezzo or Abbot Oddo ( fl. late 10th century) was a medieval monk who worked in Arezzo, active as composer and music theorist. [1]
Little is known about his life, except that he was an Abbot in Arezzo, working under Bishop Donatus of Arezzo. Odo composed a tonary (a book of chants which usually included antiphons and responsories) with a discussion of modes, which survives in twenty manuscripts, four of which contain attributions to Odo. In several of the manuscripts a prologue ascribed in three out of six to Odo is entitled "Formulas quas vobis". [2]
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