<정년퇴임기념 특별 기고문> 귀도, 존, 마르케토의 선법 이론에 대한 연구

Abstract

The present study aims at an investigation of modal theories presented in Guido’s “Micrologus(1026)”, John’s “De Musica(1100)”, and Marchetto’s “Lucidarium(1317 or 1318)”. The modal theories descussed in these treatises are based on the modal theories used from the 9th century. The modes used in the medieval period are called Protus, Deuterus, Tritus and Tetrardus, and each mode is divided into authentic and plagal modes, thus making 8 modes all together. Marchetto divides the modes further into perfect, imperfect, mingled and mixed modes according to the melodic range. Guido and John also talk about the extension of melodic range, but their treatises do not contain detailed explanations. In Guido’s treatise, the theory of the affinities of notes in which the possibility of melodic transpositions up a 5th are described, takes much space. This idea was initially presented in Hucbald’s De Harmonica Institutione in early 10th century. John and Marchetto also agree that the lower ranged melodies can be transposed up a 5th without ruining the interval relations of the melody. But they do not discuss the affinities of notes based on theoretic relations. All three theorists examined for the present research deal with modal functions and thus refer actual chants in order to make their theoretic points clear. Therefore, their treatises are useful for understanding and analyzing medieval chants.