The lean and mean acoustic incarnation of Tucson’s Wayback Machine, the Trio (Jim, Bev and Shanti) bring decades of harmonizing to an eclectic catalogue of gems by artists like the Grateful Dead, Lucinda Williams, CSN, Los Lobos, Rosie Flores, Aztec Two-Step and the Band, plus local songwriters like Stefan George, Mitzi Cowell, John Coinman and Cathy Rivers.