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Inspired the use of spreading religion and propagandas through music; as well as using music for education.
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rules for polyphonic music
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Guido of Arezzo invented the treatise Micrologus which is used to sing and write gregorian chants.
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The Ars Cantus Mensurablis is a Trieste or music theory system, that consist of six rhythmic modes
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a art and rhythmic metter written by Phillipe de Vitry
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Ferrara, Italy,
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Written by Giovanni Gabrieli; The earliest piece to include brass instruments