Composed in the studios of the INA-GRM and recorded live on stage. Composed 1979, and originally released on LP in 1983. This is a recording of a performance of the piece by the famous trio of electroacoustics; TM+. This trio was formed in 1977 with the sole purpose of giving concert performances of electroacoustic music. The members of the TM+ trio are well-known personalities in the electroacoustic community: Laurent Cuniot, Denis Dufour & Yann Geslin).