“Bela [Fleck] was very supportive when I told him what we were planning and essentially gave it his blessing,” says Blu-Bop band leader and banjoist Hank Smith. “He said those were some of the best years of his life and he was happy that someone else wanted to take up the music and have as much fun with it as he did.” The cheekily named tribute band presents a career retrospective of The Flecktones’ work and hard-to-classify style of buegrass-infused jazz. The band adheres faithfully to the Flecktones’ canon with a dash of ready improv skills. Blu-Bop performs at The Altamont Theatre on Saturday, Jan. 25, at 8 p.m. $7/$10. thealtamont.com.