Haas began his formal musical education at the age of 14, and studied composition at the Brno Conservatory from 1919 to 1921 under Jan Kunc and Vilém Petrželka.
Haas began his formal musical education at the age of 14. Haas studied composition at the Brno Conservatory from 1919 to 1921 under Jan Kunc. Haas studied composition at the Brno Conservatory from 1919 to 1921 under Vilém Petrželka.