2 flutes, clarinet, trumpet, harp, harpsichord, celesta, 2 percussions, violin, viola and cello

Commission: SMCQ, with support from the CCA

Premiere: January 29, 1981, Concert 127 [Ligeti, Burke], Salle Pollack — Pavillon Strathcona — Université McGill, Montréal (Québec)