From the early 1980s onwards, the Experimental Studio produced Luigi Nono's entire late work, who compared Haller's importance for these compositions to that of Joseph Joachim for Brahms' Violin Concerto. In particular, the late major work Prometeo would not have been realisable in this form without Haller's collaboration. In addition to Nono, Haller also worked with composers such as Pierre Boulez (Répons), Kazimierz Serocki (Pianophonie), Brian Ferneyhough, (Time and Motion Study), Dieter Schnebel (Monotonies) and Emmanuel Nunes (Wandlungen) together.Hans Peter Haller on Sens Critique
