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The Development of Polyphony. Sources. Musica enchiriadis , Scolia Enchiriadis ( c. 900) manuals for singers and one of the major musical documents of the Middle Ages. Three kinds of organum octave fifth fourth. Organum at the 5th.
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Sources • Musica enchiriadis, Scolia Enchiriadis (c. 900) • manuals for singers and one of the major musical documents of the Middle Ages. • Three kinds of organum • octave • fifth • fourth
Organum at the 5th • vox organalis moves parallel with the vox principalis at the fifth below • octave doubling to form 3 or 4 voices possible
Organum at the 4th • “artifical” polyphony: parts independent to avoid tritones (diabolus in musica!)
Polyphony • Why? • Exaltation and Embellishment • horizontally: trope, sequence — vertically: organum • How? • singers with different natural vocal ranges singing at their most comfortable pitch levels • a practice of organists adopted by singers • organum: originally, any musical instrument, later in particular an organ; used perhaps to describe the precise measurement of pitches in polyphony
Organum • Alleluia • organum • chant • Verse • organum • chant (=Alleluia) • Alleluia • [organum] • chant
St. Marital (9th-12th c.) • In the organums of the monastery of Saint-Martial at Limoges (Aquitaine), the vox principalis andvox organalis exchanged position: • the plainsong part (vox principalis) was reduced to the role of sustaining each tone in the lower voice
St. Marital • the organal part in free melismata in the upper voice • organum purum
Notre Dame • Early in the 12th century the centre of musical activity shifted to the church of Notre-Dame in Paris • Leonin: optimus organista • Magnus liber organi de gradali et antiphonario • 2 voices • Perotin: optimus discantor • Clausula (section) in discantus style (singing apart, syllabic against neumatic) • when words were provided for the added part or parts, a clausula became a motet • incorporating the rhythmic patterns already well-known in secular music and adding more than one part to the cantus firmus
Perotin, Organum triplum “Alleluia Nativitas” W2=WolfenbüttelHerzog August Bibliothek, Codex Guelf. 1099 Helmst., fol. 16r (s. 13 ex.)
Mode — Grouping — Ex. — Rhythmic (medieval—today) Modal Notation
Organum,Rome, Biblio. Apost. Vat., Fondo Ottoboniano Lat. 3025, f. 49
Perotin: Sederunt • Sederunt • organum quadruplum • principes… • chant