ARISTIDES, QUINTILIANUS, the author of a treatise on music, who lived probably in the 3rd century A.D. According to Meibomius, in whose collection (Antiq. Musicae Auc. Septem, 1652) this work is printed, it contains everything on music that is to be found in antiquity. (See Pauly-Wissowa, Realencyk, ii.