When Jessica Pratt released her debut self-titled album, which she boasts had virtually no post-production, the singer-songwriter was critically praised for her austere guitar and hypnotic voice. It should come as no surprise then that the indie musician is proceeding with caution as she embraces a more complex and refined sound on “Here in the Pitch," her fourth album, out Friday. The 37-year-old has often been compared to pioneering folk musicians like Joni Mitchell and Joan Baez, but she has sometimes resisted these comparisons as reductive. (May 2)