In the late 1950's and early 60's, Xenakis worked with GRM (Groupe de recherches musicales) in Paris to produce several pieces for electromagnetic tape, including Orient-Occident, a piece often overshadowed by works like Concrete PH and Bohor, which are rightly considered more groundbreaking pieces in Xenakis's early oeuvre, particularly Bohor, with its unique source material, ...
