I assume that when Dweezil Zappa set out to pay tribute to his father Frank with Zappa Plays Zappa 10 years ago, a lot of Frank fans were unsure what they were in for. Frank’s music was, and still is, special — to me it’s like watching Sesame Street while a recording of Carl Sagan runs simultaneously. His tunes fuse funky avant-jazz rock with bizarre wit and noise combinations that make the listener either run for the hills or into Frank’s arms. Yet Dweezil and his band bring what fans (or at least I) feared would be missing from the set, which is the dark and improvised presence that Frank seemed to bring to the stage. Dweezil does appear to be a bit more profit-savvy than his father, who publicly questioned political and social issues and was an excellent orator. Although it is a tribute, when I saw them in 2009, the giant Frank on the screen behind the band felt a little bit more like promotion than homage. But when the band strikes up “Peaches en Regalia,” the funk takes over and any sense of commercialism is squashed.