Although a short passage with graphic notation for Luigi Russolo’s Resvigli di una città has survived, not enough documentation is available to make any definitive statements about  the concerts with Luigi Rossolo’s Intonarumori, but going by later Futurist manifestos they most likely also featured some guided improvisations.

“The Futurist ideal is to identify the performer with the creator, to bring improvisation to everyone.”
– Franco Casavola, reporting to the 1924 Futuristic Congress

 

“As song and rhythm, music rises out of an improvised intoxication. Also in current music, the necessity of playing it imposes upon the performer a collaboration with the author in such a way that the performance envelopes a necessary integration of the musical idea. The Futurist ideal is to identify the performer with the creator, to bring improvisation to everyone. The extemporaneous ingenious element of music, conceived as being the real art of elogance, frees music from traditional forms and modes.”
– Musical Improvisation – Bartoccini, Mantia, 1921