For 10 points, name this French musique concrète composer of Poème Electronique and Density 21.5.
Frank Zappa adored this composer, going so far as to spend his birthday money to call him after being inspired by a piece for winds and double bass that lacks this composer's characteristic aggressive percussion. That piece is this composer's only work with multiple movements, each of which opens with a phrase on a solo instrument. This composer of Octandre wrote the influential essay "The Liberation of Sound" about his theory of "sound-masses" and set Paul Verlaine's "Un grand sommeil noir" to music. Another of his works features such unusual instruments as the guiro, sleighbells, sirens, and recordings of roaring lions; that work is called Ionisation. This composer was commissioned to write a "score" to a World Expo installation managed by Iannis Xenakis and designed by Le Corbusier, the Phillips Pavilion, and he also wrote a short work for solo flute that is titled after the mass-to-volume ratio of platinum. For 10 points, name this French musique concrète composer of Poème Electronique and Density 21.5.
Frank Zappa adored this composer, going so far as to spend his birthday money to call him after being inspired by a piece for winds and double bass that lacks this composer's characteristic aggressive percussion.
Edgard {Varèse}