Borgo and Pellegrin create complex, multi-layered rhythmic phrases that overlap and interlock, and the result is music that engages both brain and viscera -- even though locating the "one" can be a harder mission than finding a parking space on Black Friday ... A dizzying vortex fed by the currents of 9 vs. 13 beats coalesce in "Cellar Door," which boasts liquid solos from Sprague and Borgo ... Pellegrin's drums straddle the divide between ethnic and orchestral percussion with a level of excitement that is hard to describe ... In all, it's challenging but rewarding music.