Arco e Tasto comprises violinist Jinwoo Lee, concertmaster of Milwaukee Symphony Orchestra, and the highly sought-after collaborative pianist Eunice Kim. On Once Heard, Long Forgotten, the duo shines a long-overdue spotlight on Emilie Mayer and Luise Adolpha Le Beau, two extraordinary women who contributed substantially to German Romantic repertoire. The program features Le Beau’s Violin Sonata, Op. 10, Romance, Op. …