This artist conducted a series of concerts in which he filled a concert hall with foam cushions and red rugs. This composer's longest work ends with a sudden crashing chord just after a soprano whispers the word "mort," and sets five poems by Stephane Mallarme. He wrote that the composers who developed twelve-tone music killed it by returning to Classical forms in his polemic "Schoenberg is Dead," and gained prominence after his second piano sonata was premiered by Yvette Grimaud. This composer of Pli selon pli was, along with Karlheinz Stockhausen, the major composer of the Darmstadt School. 
This artist conducted a series of concerts in which he filled a concert hall with foam cushions and red rugs. This composer's longest work ends with a sudden crashing chord just after a soprano whispers the word "mort," and sets five poems by Stephane Mallarme. He wrote that the composers who developed twelve-tone music killed it by returning to Classical forms in his polemic "Schoenberg is Dead," and gained prominence after his second piano sonata was premiered by Yvette Grimaud. This composer of Pli selon pli was, along with Karlheinz Stockhausen, the major composer of the Darmstadt School. One of his compositions is scored for alto and six instruments, including guitar, vibraphone, and Xylorimba, features the sections "The Furious Handicraft" and "Executioners of Solitude," and is based on the poetry of Rene Char. For 10 points, name this avant-garde French composer of The Hammer without a Master.
This artist conducted a series of concerts in which he filled a concert hall with foam cushions and red rugs.
Pierre Boulez