Ritirata notturna di Madrid

Musica notturna delle strade di Madrid (Night Music of the Streets of Madrid), Opus 30 No. 6 (G. 324), is a quintettino for stringed instruments (ca. 1780), by Luigi Boccherini, the Italian composer in service to the Spanish Court.

source: Wikipedia

The final movement of the quintet is the “Ritirata,” Retreat as sounded by the city garrison to signal the midnight curfew. As the city watch comes closer the music grows louder, and then dies away as the parade passes. In 1975 the La Scala Orchestra asked Luciano Berio for a short opening piece, and Berio layered four versions of the “Ritirata” over each other, magnifying the heterophonous street music into an exuberant processional.

source: LA Phil