Gumar and His Magical Midi Band (spelled on their MySpace page with exclamation points in place of i's) are about as wacky as their name suggests. The instrumentation on songs like "Alien Groove Thang" is pretty exuberantly earnest (i.e. these musical pranksters are serious musicians, in the vein of, say, Electric Six). Their support on this Northern bill are less self-aware but no less talented, and most are conveniently found sharing space on Bandcamp comps like Dropping Gems. Cumulatively, they span the breadth of electronic music's figurative cosmos - from the atmospheric, Cuisinart-ed sounds of Citymouth, to Brownbear's subterranean dubstep, to the bifurcated beatsmith-ery of DJAO's high-end/low-end contrasts. Oly duo Ghost Feet, who are also playing, might just make the most ebullient and colorful music of this whole estimable lineup. 

[Northern, with Citymouth, Brownbear, DJAO, Ghost Feet, 8 p.m., all ages, 321 Fourth Ave., Olympia, northernolympia.org]