Hidden colouration: deep metrical flexibility in Machaut

ABSTRACT This article introduces a metrical adaptation to the contrapunctus method of pitch reduction commonly used to analyse Ars Nova counterpoint. Expanding the medieval concept of colouration from the mensural to the metrical, my contrapuncti highlight the flexible toggling between perfect and imperfect groupings at various rhythmic levels in selected motets by Guillaume de Machaut (c.1300–77). The viewpoint advanced here assumes no a priori metrical grid to parse the musical surface, but rather allows the articulation of sonority, cadence and form to reveal a fluid and unique metrical grouping structure for each piece. With metrical emphases shown as inextricable from contrapuntal and harmonic ones, the metrical contrapunctus captures a more comprehensive picture of Machaut's musical language.