English summary: Olivier Messiaen was one of the great composers and
organists of the twentieth century. The present volume presents his
conversations with Olivier Glandaz, the man responsible for maintaining
his organ, concerning the importance of the instrument and its
repertoire. French description: Olivier Messiaen (1908-1992),
compositeur et organiste, se confie a l'organier Olivier Glandaz.
Pendant plus de vingt ans, celui-ci l'a accompagne pour l'entretien de
son orgue a l'eglise de la Trinite. Ce document inedit revele
l'importance capitale que representait l'orgue, l'instrument et son
repertoire, pour le grand compositeur.