The composer, violinist and educationalist Louis Spohr (1784–1859) caused a sensation as a child already: At the age of 5, he took his first violin lessons and at the age of 15 was employed as chamber musician of the Duke's orchestra. Very soon, his fame as a virtuoso violinist ran ahead of him, and he undertook concert tours throughout Europe. On these trips, he was often accompanied by his first wife, a virtuoso harpist and pianist. For their joint music-making, Spohr wrote a Sonata for violin...