While the qenet system of four of these elements was likely codified in modern Ethiopia, it is often credited to the notation that Saint Yared devised for his 6th-century zema hymnary, the Book of Deggua. For 10 points each:
[10m] Name these musical elements that, in Gregorian chant, include four “authentic” and four “plagal” systems, terminology that was reused for modern-day cadences.
ANSWER: musical modes [or modus; prompt on pentatonic scales]
[10h] This 6th-century Syrian “melodist” developed the eight-mode octoechos of monodic Byzantine chant and refined the kontakion genre of chanted homilies.
ANSWER: Romanos the Melodist [or Romanós o Melodós]
[10e] Kontakia were succeeded by a genre of this name whose composers included Kassia, Andrew of Crete, and Joseph the Hymnographer. Today, this term denotes a genre of imitative music similar to a round.
ANSWER: canon [or kanōn]
<Classical Music>