| Dated: | 1960 |
| Instrumentation: | Two / Four-channel tape |
| Timing: | 22' (11'*) |
| Premiere: | May 1960 in Cannes, France |
| Dedicated to: | |
| Commissioned by: | Written for Enrico Fulchignoni's film with the same name. |
| Published: |
| Created at the GRM (Groupe de Recherches Musicales) in Paris. *There are other versions of the work. The third version was composed in 1968 and lasts 11'. Recording available from Electronic Music Foundation Media EMF102 |