DUF (Jaka Berger) is one of the most active, creative and versatile drummers, composers and improvisers on the Slovenian music scene in the last fifteen years. In 2006 he released his debut album with Samo Šalamon and Achille Succi for Italian label Splasch records. Since 2014 till today he is regularly publishing music for prepared drums that he is constructing by himself. His albums are regularly reviewed by international media on improvisation and electroacoustic music. He is part of experimental sound installation project Partija/The game with visual artist Matej Stupica, member of bands Ludovik Material and Darla Smoking. Performed in independent theater shows Gremo Vsi!, Novo mesto Readymade and Nein. Toured with EBM legends Borghesia. In 2015 he released an album of graphic composition Treatise by Cornelius Cardew. In 2016 he performed his most complex piece Audible life stream tentet for ten musicians. In 2017 finished a japan tour and released a second album with international VOB trio. Currently he is performing free jazz with Mezei Šalamon Berger trio, Džuklje Berger duo and Šalamon Džukljev Berger – Fresh Dust trio (FMR records UK), Bootleg Unit (FMR records UK), released electro acoustic album dedicated to composer Morton Feldman with pianist Dejan Berden and integrating modular synth into his prepared drumset. Since 2020 Jaka is returning to Cornelius Cardew Treatise composition, he released an album called Breakfast with Cardew that received very good reviews in international media. In 2021 he released a book of poetry remixes and sound translations called Poetrix, that includes poems of the best Slovenian independent writers.