Aristides Quintilianus, was the author of an ancient treatise on music, who lived probably in the third century AD.
According Meibomius[?], in whose collection (Antiq. Musicae Auc. Septem, 52) this work is printed, it contains everything on music that is be found in antiquity. (See Pauly-Wissowa, Realencyc. ii. 894.)