| Dated: | 1967-1968 |
| Instrumentation: | Orchestra of 98 musicians dispersed among the audience: 3 (+pic),3,3 (+e flat clarinet, +bass-clarinet),5 (+3 contrabassoon) - 6,5,4,1, timpani, 7 percussionists and strings (16,14,12,10,8). |
| Timing: | 15' |
| Premiere: | April 4, 1969 at the Royan Festival. Performance by the Orchestre Philharmonique de l'ORTF, conducted by Charles Bruck |
| Dedicated to: | Francette Xenakis |
| Commissioned by: | |
| Published: | Editions Salabert |