Born in Bátaszék, Hungary, in 1894, Zádor demonstrated an early affinity for music (exhibiting great keyboard virtuosity) and at the age of sixteen went to study with Richard Heuberger in Vienna. A year later he moved to Leipzig, where he was a pupil of Max Reger. After completing his doctoral degree at the University of Münster, he returned to Vienna, where he taught at the New Vienna Conservatory through the 1920s. While there, he composed (among other works) a symphony and two operas (both produced by the Budapest Royal Opera). He left the conservatory in 1928 to devote himself full-time to composition and never ceased writing music until his death in 1977. His final catalogue comprised numerous works for orchestra (including four symphonies), several operas, chamber music, piano pieces, choral works, songs and various concertos for what he liked to call “underprivileged” instruments—including trombone, cimbalom, double bass and accordion.