Sociologist working in sound and music since 2003, recently involved mostly in producing and staging sound essays and other experimental forms of radio art and opera which brought him to collaborate with Martin Küchen, Hilary Jeffery, Pete Simonelli, Ralf Meinz, Komuna// Warszawa, Hilary Jeffery, Pete Simonelli, Apartmen House and others. Libera is a producer of conceptual pop label Populista dedicated to mis- and over- interpretation of music as well as series of reinterpretations of music from Polish Radio Experimental Studio (Bôłt Records). He curates various concerts, festivals and anti-festivals, music programs for exhibitons and received honorary mention at 13^th Venice Arhcitecture Biennale. Other regular collaborators include National Art Gallery Zachęta, Centre for Contemporary Art in Warsaw, Polish National Museum (Królikarnia), Galerie West in The Hague, Satelita in Berlin. His essays on music and listening „Doskonale zwyczajna rzeczywistość” were published by Krytyka Polityczna. Libera is a member of art group called „Grupa Budapeszt”.