Luciano Berio (1925- 2003) was one of the most influential composers of the second half of the 20 th century. His huge and diverse output includes at least a handful of works acknowledged by all to be modern masterpieces. His eighteen Sequenzas for solo.
Berio's Sequenzas: Essays on Performance, Composition and Analysis - Janet K. Halfyard - ISBN: 9781138247994. Between 1958 and 2002, Luciano Berio wrote fourteen pieces entitled Sequenza, along with several versions of the same work for different instruments, revisions of the original pieces and also the parallel Chemins series, where one of the Sequenzas is used as the basis for a new.