By 1929 , he was conducting at the Festspielhaus , Salzburg and in 1934 he led the Vienna Philharmonic for the first time . He conducted regularly in Ulm and Aachen . In 1929 , he conducted Salome at the Festspielhaus in Salzburg and from 1929 to 1934 Karajan served as first Kapellmeister at the Stadttheater in Ulm .