A multifaceted musician, Brauneis instructed students in many musical subjects, including composition, conducting, guitar, harp, organ, piano, violin, voice, and theory.
Considered Canada's first native musician to be trained in Europe, he was a highly influential teacher and figure in the classical music scene in 19th century Montreal.
After returning to Canada, he served as organist at Notre-Dame Church from 1833 until 1844, and then in the same position at Saint-Jacques Cathedral until 1857 when he was succeeded by Romain-Octave Pelletier I.
[1] For more than 30 years, Brauneis taught music at the Congregation of Notre Dame of Montreal in addition to teaching privately and at other schools.
His daughter, Marie-Josephine Sydney, was married to politician Henry Stanislas Harwood, and his grandson was the well known Canadian gynecologist Louis de Lotbiniere-Harwood.