Short piece with 3 flutes, 3 clarinets, 3 bassoons, 4 french horns, 3 trombones, timpani, harp, 3 violas, 3 cellos.
It is based on Messiaen's mode 2 and quartal/quintal harmonies, and several techniques of mass sonority (Ligeti, Xenakis, Penderecki, et...)