What makes Sound Hierarchy by Ivo Perelman notable?

'Sound Hierarchy' received critical acclaim for its innovative approach to improvisation and was noted for exploring complex soundscapes. The album contributed to the discourse on free jazz's boundaries, influencing subsequent artists in both the Brazilian and international jazz scenes. Released in 1997, 'Sound Hierarchy' is Ivo Perelman's fourth studio album and showcases his evolution as a prominent voice in avant-garde jazz. This period marked his transition into deeper improvisational territories, establishing him as a significant figure in the Brazilian jazz scene after relocating to the United States.