Guido of Arezzo (1 ene 991 año – 1 ene 1033 año)

Descripción:

Italian monk who invented the Guidonian hand to teach boys how to sing chant psalms, considered the inventor of neumatic notation, wrote Micrologus treatise on music; hymn for solmization was "Ut quaent Laxis;" Guido describes a system in which music is organized around groups of six consecutive pitches, hence hexachord.

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