Camp Shalva, the Bobov boys’ camp based in Parksville, NY, was put on the Jewish music map over three decades ago through the enduring compositions of Reb Moshe Goldman. Now it’s in the news again, as Shalva’s head counselor, Reb Shea Rosen of Flatbush — talented instrumentalist and natural storyteller — has put together a new boys’ choir extending far beyond his summer job and Chol Hamoed programs: He wants the boys to have a completely kosher musical outlet all year round.