"Franz Xaver Hauser (12 January 1794 in Krasowitz, today Krasovice, part of Kondrac, (Benešov District), Czech Republic – 14 August 1870 in Freiburg im Breisgau) was a singer, voice teacher, and music manuscript collector.
At his father's insistence, he first studied medicine, but he then studied singing with Johann Wenzel Tomaschek and composition with oboist Josef Triebensee.
He made his stage debut in 1817 in Prague as Sarastro in Mozart's Magic Flute. He found great success at the opera theaters in Vienna, Leipzig, and Berlin. He retired from the stage in 1838 and taught singing in Vienna. In 1846 he was appointed as director of the newly established conservatory in Munich (now the Hochschule für Musik und Theater München), serving as its director until 1864. He retired in 1865 to Karlsruhe and two years later to Freiburg im Breisgau." - (en.wikipedia.org 26.12.2020)