Leopold Jansa received a brief period of musical instruction from Emanuel Aloys Förster after leaving the University of Vienna, where he had initially enrolled to study law. This training took place in Vienna around the late 1810s, before Jansa began his professional concert career. Although short in duration, Förster’s guidance helped prepare Jansa for his development as a violinist and composer.
Förster, a respected Viennese composer and music teacher associated with the Classical school, had significant influence on many musicians of his time, and Jansa benefited from his expertise. The instruction Jansa received from Förster contributed to his readiness for his early appointments, including his service as a chamber musician at the Brunswick court in 1823 and his later work as a prominent performer and educator in Vienna.