Education
At 16 she attended Stuttgart"s Academy of Music, graduating to work with Maestro Fernando Germani at the Accademia Nazionale di Santa Cecilia in Rome. She studied with Helmut Walcha in Frankfurt am Main, and later at the Accademia Musicale Chigiana in Siena, Italy, at a time when Siena was crowded with aspiring musicians: Arturo Benedetti Michelangeli, George Enescu, Gaspar Cassado, Nathan Milstein, and Paul van Kempen among them.
Career
She studied music religiously, in a culture of religious music Haas"s concert repertoire includes works by Johann Sebastian Bach, César Franck, Charles Widor, Max Reger, Marcel Dupré, Maurice Duruflé, Olivier Messiaen, and contemporary compositions by Paul Hindemith and Max Baumann. Haas has also taught, including as Professor of Organ at the Robert Schumann Academy in Düsseldorf, where she taught pupils to use their feet "as if they were Speedy Gonzales".
Much of her professional career was spent in Frankfurt am Main, where she was the organist at Saint Leonhard"s Church (1956-1980) and then in Niederrad (1980-1992).
Since retiring these posts Haas plays the organ and harpsichord at home, concentrating on Bach"s Kunst der Fuge, Goldberg Variations, and Leipziger Chorale.