This section is from "The Encyclopaedia Britannica". Also available from Amazon: Great Books of the Western World (60 Volumes).
Authentic (from Gr. αὐθέντης, one who does a thing himself), genuine, as opposed to counterfeit, true or original. In music it is one of the terms used for the ecclesiastical modes. The title of Authentics was also used for Justinian's Novells.
 
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