It's always interesting when "old-timey" music is interpreted by modern players. Sometimes, the traditions are kept tightly intact, guarded like secrets between best friends, while other times they're more like paper boxes, poked and torn at from the inside with broken guitar strings and fingernails so that other styles can stream in. In the case of Abby DeWald and Amanda Barrett of the Ditty Bops, their sophomore album, Moon Over the Freeway, falls nicely somewhere between the two extremes. The music is heavily influenced by Western swing and Andrews Sisters-type harmonies,