Cindy ReinerSeattle rock-and-soul trio Red Jacket Mine will be releasing a 7-inch, “Listen Up (If the World is Going to Hell),” next month on Fin Records. To tide fans over in the meantime, there’s “Poplar Bluff,” a genial single that boasts easy, mellow instrumentation, a compelling chorus, and the sharpest arrow in the band’s quiver, frontman Lincoln Barr’s sweet, smooth, and unassuming vocals. Barr ominously described the song’s subject matter to me as “a particularly unsavory southeast Missouri town I encountered a few times as a kid.”Listen to “Poplar Bluff” on Red Jacket Mine’s Bandcamp page.