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Johannes de Grocheio (Grocheo) (c. 1255 – c. 1320) was a Parisian musical theorist of the early fourteenth century. His French name was Jean de Grouchy, but he is more commonly known by his Latinized name. A Master of Arts, he is the author of the treatise ''Ars musicae'' ("The art of music") (c. 1300), an attempt to describe the music of his time as it was practiced in and around Paris. He divides music into three categories: *''Musica simplex'' (popular music; music of the layperson) *''Composita'' (according to metrical rules; music of the educated person) *''Ecclesiastica'' (music of the Church) Grocheio departed from Boethius' taxonomy, which divided music between music of the world, human music, and instrumental music. Almost one-third of Grocheio's treatise is devoted to liturgical and composed music. The rest is devoted to secular music, and Grocheio surveyed its new social importance in a systematic and pedagogical fashion. Grocheio writes, for example, that "a good fiddler generally performs every kind of ''cantus'' and ''cantilena'' (), and every musical form."() Grocheio was also one of the first scholars to define a motet. He believed that the motet was "not intended for the vulgar who do not understand its finer points and derive no pleasure from hearing it: it is meant for educated people and those who look for refinement in art."() == The sociology of music in Grocheio's treatise == Grocheio attempted to address the sociological functions of specific musical forms and genres, and touted music as a cure for the ailments of society, imbuing it with the power to restrain social vices. He believed that when the elderly, the laborers, and the middle classes sang of the hardships endured by the heroes of the ''chansons de geste,'' it helped them to bear their miseries, thus contributing to the welfare of the state. Narrative epics, Grocheio concluded, contributed to the stability of the city because they encouraged citizens of all ages and stations to be satisfied with their lot in life. Conversely, Grocheio believed that trouvère songs inspired kings and noblemen to do great things and to be great: "This kind of song is customarily composed by kings and nobles and sung in the presence of kings and princes of the land so that it may move their minds to boldness and fortitude, magnanimity and liberality…" 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Johannes de Grocheio」の詳細全文を読む スポンサード リンク
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