This composer of Poeme Electronique employed a style he called "micropolyphony" in works like Apparitions and Atmospheres.
Many of this composer's late works utilize a recurring motif of a descending whole-step followed by a descending half-step. He wrote two works accompanied by instrumental septet in which three vocalists sing music mixing together five "emotional positions" in lines consisting of a nonsense language of this composer's invention. He employed a "lamento" motif in the fourth movement of his Horn Trio, which is an homage to Brahms, and in (*) "Autumn in Warsaw" the sixth and last piece in his first book of Etudes. This composer of Aventures wrote a piece scored for 100 metronomes and a piece that opens with the largest cluster chord ever: consisting of every chromatic note within a fiveoctave span. This composer of Poeme Electronique employed a style he called "micropolyphony" in works like Apparitions and Atmospheres. For 10 points, name this late 20th-century Hungarian composer.
Many of this composer's late works utilize a recurring motif of a descending whole-step followed by a descending half-step.
György (Sándor) Ligeti