Sounding current in the modern age of free improvisation, this 1973 recording of a live concert at Teatro Beat 72 in Rome, led by outstanding performers, trumpeter Alvin Curran (MEV), clarinetist Roberto Laneri (Prima Materia) and trombonist Giancarlo Schiaffini (Gruppo di improvvisazione Nuova Consonanza), stands as a testament to the free improv movement they helped to expand.

Reissuing composer Luigi Nono's 1990 Edition Rz LP with the addition of 3 works, presenting 6 remarkable symphonic works combining live electronics and voice, intended to expand the technical possibilities of sound and the perceptive faculties of the listener.