Wild animals have all kinds of ways to make themselves appear larger than they actually are—cats arch their backs, cobras show their hoods, bears rise up on their hind legs. Ratatat, the slight pair of Evan Mast and Mike Stroud, pull off a similar trick, inflating their guitar/synth studio hybrids into arena-sized instrumental jams via the magic of multitracking. Live, the duo sound like an army of axe-men riding on loose grooves and bedroom hiphop beats. (Neumo's, 925 E Pike St, 709-9467. 8 pm, $13, all ages).