Sonata for two clarinets

The Sonata for two clarinets, FP 7, is a piece of chamber music composed by Francis Poulenc in 1918. Dedicated to Édouard Souberbielle, its total execution time is about six minutes. It is unusual among clarinet duets in that it is written for B♭ clarinet, which generally plays the melodic themes, and A clarinet, which plays a more supporting role through much of the piece. It is also unusual for music of this period that the clarinetists perform different time signatures simultaneously in parts of the opening movement.