Dialogue de l'ombre double
Dialogue de l'ombre double (Dialogue of the double shadow) is a mixed work by Pierre Boulez for clarinet and electroacoustic device composed in 1985. The play is dedicated to Luciano Berio for his sixtieth birthday. There exists a version for bassoon, for saxophone, for transverse flute and for recorder, each made by the performer themself. "Dialogue de l'ombre double" is based on the scene "double shadow" of Claudel's "The Satin Slipper". The clarinetist dialogues with his/her shadow, represented by a part of clarinet pre-recorded on magnetic tape and spatialized by means of loudspeakers  dispersed around the audience. The work was premiered on October 28, 1985 in Florence by Alain Damiens. The version for saxophone was premiered on June 23, 2001 at the Théâtre des Bouffes du Nord, by Vincent David. The version for flute was premiered in May 2002 in San Francisco by Cécile Daroux. In 2015, another version for recorder was premiered by Erik Bosgraaf. The performance lasts about 15 to 20 minutes.