Ambrosian Chant

Ambrosian chant is monophonic Latin chant, but it carries more melodic ornament and freer leaps than its better-known Gregorian neighbor. Rhythm follows the prosody of the Latin text rather than a metric beat. The repertoire makes heavy use of antiphonal exchange between two choirs, and its modal system preserves features that pre-date the eight-mode system codified for the Roman rite. The cumulative effect is of older Western liturgical sound surviving inside a working modern cathedral.

The tradition is associated with St. Ambrose, fourth-century bishop of Milan, and has been preserved continuously by the Archdiocese of Milan as the Ambrosian Rite. When Charlemagne and his successors pushed the Roman (Gregorian) repertoire as the standard across the West, Milan held on to its own. The rite — and its chant — survived the Council of Trent and the 20th-century liturgical reforms with minor adjustments rather than wholesale replacement.

Compare a piece of Ambrosian chant against a Gregorian setting of the same liturgical text and the differences come into focus: Ambrosian melodies tend to be longer, more ornate and more given to wide leaps. The antiphonal back-and-forth between two halves of the choir creates a spatial dimension that more uniform plainchant doesn't have.

Recordings by the Cappella Musicale del Duomo di Milano (the cathedral's own choir) — for instance their 'Te Deum' — are the standard reference, with the room acoustic of Milan Cathedral built in.

The Cappella Musicale del Duomo di Milano has been an institution of Milan Cathedral for over five centuries, making it one of the oldest continuously active musical ensembles in Europe.