South Louisiana’s musical heritage, rich as it may be, sometimes makes it easy to forget that the northern part of the state had its share of musical fertility as well. Dale Hawkins, James Burton, Bob Luman and Roy Buchanan all played a similar, influential style of blues entangled rock ‘n’ roll that could easily be dubbed “The Shreveport Sound.”

Margaret Lewis, who arrived in Shreveport in 1958 from Levelland, Texas, is a perfect example of the kind of gutsy, soulful singer that the area ...