Born in Croatia, Antun studied piano in Dubrovnik, Ljubljana and Austria.
Winning a scholarship to attend a three-year Master Course in Conducting at Leningrad’s Rimsky-Korsakov Conservatory provided Antun with the opportunity to subsequently work with the Leningrad State Symphony Orchestra, the Veneto Philharmonia, the Slovene and Croatian National Orchestras and other prominent orchestras in Russia and Europe.