Troorkh

Christian Lindberg traveled to Paris to meet Xenakis for the first time and audition for him. Xenakis told him he didn't have more time, so he asked Xenakis if he could write a trombone concerto for Lindberg. Xenakis declined the proposition and Lindberg went back home. However, he received a composition for solo trombone, Keren, a few years later, in 1985. It required very high skills to be played, so he manage to work on all the difficult passages and sent a recording of the piece to Xenakis. Xenakis replied to him with great satisfaction that he could finish a trombone concerto for him on June 1991.