 He continued his studies at the Vienna Academy of Music and Dramatic Art under Hanns Jelinek, and also at the Darmstädter Ferienkurse.After some early neo-classical orchestral works that show his mastery of traditional techniques, Štuhec gradually moved towards the adoption of new techniques in the early 1960s.Although in 1955 he had produced a musique concrète composition in "Biological Transformation", the radical change came with the chamber pieces "Situacija" (1963) and "Silhuete" (1964) and the orchestral "Differentiations" (1964), all of which exhibit his assimilation of 12-note and aleatory procedures.