Over the course of a decade, Bang on a Can founding composer Michael Gordon has collaborated with the world-renowned Kronos Quartet on a series of provocative works that have sought to stretch, bend and otherwise reshape the boundaries of modern classical music. Clouded Yellow assembles these works for the first time, perfectly encapsulating the breadth and complexity of this long-standing creative partnership.

Clouded Yellow features four pieces: the title track (composed in 2010), Exalted (2010), The Sad Park (2006) and Potassium (2000). The title of the first refers to the clouded yellow butterfly, which is known in England for its mass migrations; the word “clouded” is also meant to describe the blurred harmonies and melodies of the piece.

Potassium is for amplified string quartet and electronics, with a fuzz box used throughout to lend a mysterious distortion to the sound. The Sad Park is accompanied by recordings of children ages 3 to 4 and their responses to the tragic events of 9/11. Exalted, which also features the Young People’s Chorus of New York City conducted by Francisco Núñez, sets the opening of the Jewish Kaddish in Aramaic, connecting the choral voices of mourning to those of the children in The Sad Park.