Together with his brother Julius (violin) and sister Isabella (piano), Jacob played in a trio at local dance halls, inns and cafés, performing popular dance music and operatic arrangements.
Bersama-sama dengan saudaranya Julius (biola) dan Isabella (piano), Jacob bermain dalam sebuah trio di gedung-gedung pertunjukan, penginapan-penginapan, dan kafe-kafe lokal, menampilkan musik dansa dan opera populer.