Have a look at the score

In a highly anticipated piece, Georges Aperghis, the master of musical theatre, delivers an accordion concerto. An instrument that has long been underrated before coming back to the scene thanks to composers like Luciano Berio, who wrote a wonderful Sequenza, or Mauricio Kagel. Georges Aperghis composed this concerto for Teodoro Anzellotti, a virtuoso of contemporary accordion. Popular sounds and experimental effects combine to create an unprecedented musical discourse offering an irresistible dialogue between the soloist and the orchestra.

Interview - Georges Aperghis talking about his accordion concerto