Hello RMCC,
A friend of mine wrote this article which may be of interest:
PIERRE BOULEZ
Convulsive beauty in electroacoustic music, by Daniel Barbiero
"What better place to begin than by acknowledging the irony?: Surrealism, the movement that was generally hostile to music, helped inspire one of the twentieth century's major works of electroacoustic music. While Boulez's composition is not a Surrealist work per se, it nevertheless does capture the essence of Andre Breton's phrase and translates the idea behind it into specifically musical terms."
https://www.furious.com/perfect/pierreboulezexplosante.html
Best wishes,
Jason