Sweet Emma Barrett, who was at her most powerful in the early '60s, became a symbolic figure with the Preservation Hall Jazz Band, playing in a joyous but obviously weakened and past-her-prime style on world tours. Barrett spent most of her career living and playing in New Orleans, including gigs with Oscar "Papa" Celestin in the 1920s and later with Armand Piron. Sweet Emma, who gained the nickname of "the bell gal" because she wore red garters with bells that made sounds while she played, was purely a local figure until 1961 when she made her finest recording, a Riverside se...