This Oaxaca-born, Minnesota-raised singer dips into Mexican, American and other roots traditions on her eighth album, injecting styles from brassy banda to Scottish folk into the set; she even covers Lucinda Williams' wistful "I Envy the Wind" in English and Spanish. The mélange doesn't always work, but when everything clicks, as on duets with Rubén Albarrán ("Perro Negro") and Merc...