The final quarter of this four-day, cutting-edge digital-arts fest climaxes at Neumos with a bombastic nocturnal techno feast featuring Alter Ego, Tim Exile, Reagenz, and Jerry Abstract. Before that, hit Volunteer Park in the afternoon for eclectic, cortex-splintering sets by Eddie, Gaslamp Killer, KiloWatts, and Sub Swara; and in between, chill out to the audiovisual splendors of the showcases Ameritronica (Triple Door) and Beauty in Binary (Seattle Asian Art Museum). And realize you've just had a whirlwind tour of electronic music's peaks. (Various venues, www.dbfestival.com. Noon–2 am.)