It's difficult to categorize Scrapomatic'sSidewalk Caesarsas anything other than generically "blues-based" but this act, led by Derek Trucks' singer Mike Mattison and guitarist Paul Olsen, is defined by its eclectic qualities. The duo wend their way through a heady, rootsy mix of swamp rock, soul, gospel, Delta blues and even punk based music on their third release. They combine disparate elements with predominantly original compositions to yield an inimitable, even genre breaking gumbo. Is "Long Gone" country, blues, or rock? How about the peppy, hip shaking "The Fire Next Time" or the acoustic, folksy "Drunken Spree"? The truth is that these songs are that and more. The tunes' deceptively simple structure is a moving target, anchored by Mattison's gruff, malleable vocals, Olsen's chameleonic guitar and often obtuse lyrics that convey mood over specific meaning. Percussionist Count M'Butu from Trucks' band and the guitarist himself contribute to a few tracks, yet Scrapomatic's taut, concise material and distinctive sound make this band far more than a spinoff.  Olsen's rather flimsy voice is no match for Mattison's husky attack however when the two combine on "Hook, Line and Sinker," the effect, like the album, is compelling and different from anything else in a musical format that, thankfully, can't be pigeonholed.-- Hal Horowitz