There were better-known figures than Jo-El Sonnier in the Cajun music tradition of Louisiana. And there were Louisiana musicians such as Doug Kershaw who have taken simplified versions of Cajun music to Nashville and experienced greater success in the world of country music. But no one moved as easily between Cajun and country music as Sonnier, and no one was as well respected as a bridge between musical traditions. A fixture of the traditional Cajun scene, Sonnier also reached the top of the country charts and brought his energetic accordion sounds to recordings by artists ra...