According to The New Penguin Dictionary of Music
, Luciano Berio is an Italian composer, pupil of Dallapiccola; has employed spatial effects, e.g. in "Circles" (text by E.E. Cummings) for voice, harp, and 2 percussion; has also written electronic music, and works allowing free choice by performers. A series of pieces each called "Sequence" (sequenza
) is for different solo instruments - no. 5 for trombone, no. 6 for viola. His Sinfonia (orchestra, organ, piano, harpsichord, chorus, reciters) incorporates a section of Mahler's symphony no. 2.
in an article on Berio's Gesti in "The Recorder and Music Magazine" (November 1966) also says that "Gesti" can be thought of as a little sequenza
I have heard Michala Petri
playing "Gesti" sometime in 1982/3. Unfortunately I cannot say that I particularly enjoyed it (perhaps I am simply too old-fashioned in my taste). I find it interesting that although both Frans Brüggen and Michala Petri have broadcast it and given public performances, neither, as far as I know have actually recorded it.