Lefterna is the music project of Boban Ristevski, concentrated and based on exploring mostly the ambient/drone and industrial/noise related kinds of music. With elements of minimalism/improvisation/abstraction etc., the music is balancing between the more structured forms and the improvised approach to music. He has released a numerous EPs and albums, collaborations and splits on a diverse labels, such as TIBProd., Neus-318, Striate Cortex, Cae-Sur-A, Haze, Attenuation Circuit, Ostroga, Etched Traumas, Petroglyph Music and others.