Listen to Improvisation: Improvisation online. Improvisation: Improvisation is an English language song and is sung by Frederic Rzewski, Vincent Bouchot and Marianne Pousseur. Improvisation: Improvisation, from the album Pousseur: La Guirlande de Pierre, was released in the year 1995. The duration of the song is 7:06. Download English songs online from JioSaavn.