Jon Burlingame “Can you believe that’s an online orchestra?” asks composer Laura Karpman.She’s talking about the musical score of HBO’s new “Lovecraft Country,” which debuted Sunday night and is believed to be the first post-pandemic series to be entirely scored, from first episode to last, by musicians recording remotely from their homes.Together with musical partner Raphael Saadiq, Karpman scored the 10-part series in which three African-Americans drive across 1950s America experiencing not