Alypius of Alexandria
Alypius of Alexandria (Ancient Greek: Ἀλύπιος) was a Greek writer on music who flourished in the 4th century CE. Of his works, only a small fragment has been preserved, under the title of Introduction to Music (Εἰσαγωγὴ Μουσική). == Works == The work of Alypius consists wholly, with the exception of a short introduction, of lists of the symbols used (both for voice and instrument) to denote all the sounds in the forty-five scales produced by taking each of the fifteen modes in the three genera (diatonic, chromatic, enharmonic).