A world premiere by composer Elizabeth Younan anchors an evening exploring how today’s music grows out of—and pushes beyond—the traditions that came before it. Rabia Brooke pairs Younan’s new work with pieces that have shaped her own musical life, creating a program about influence, discovery, and the continual expansion of the violin repertoire. Intricate and luminous, Younan’s music rewards the kind of close listening that The CheckOut makes possible.