 She went to Bromberg (today Bydgoszcz) where she started to study singing.Later she went to Berlin where she studied singing with Adolf Deppe and Maria Schwadtke, a student of Marianne Brandt, and to Milan where she studied with Teresa Arkel.Dux made her professional debut in 1906 at the Cologne Opera as Pamina in Mozart's "The Magic Flute".