Polyphony, the simultaneous combination of two

Position 1: Consequently, polyphony laid the structural groundwork upon which Renaissance counterpoint and later tonal harmony would be built.

Position 2: Before its emergence, most sacred music consisted of monophonic plainchant, in which all singers performed a single unified melody.

Position 3: This innovation demanded new notational systems to coordinate rhythm across the independent voices, ultimately giving rise to mensural notation.

Position 4: Polyphony, the simultaneous combination of two or more independent melodic lines, fundamentally transformed Western music during the medieval period.

Position 5: Composers such as Léonin and Pérotin at Notre-Dame began layering distinct vocal parts, creating a richer and more complex sonic texture.