Since its inception, S1 has proven to be one of the most reliable sources for experimental sound and art. This weekend further cements the art space's reputation, as it welcomes a wealth of musical talent from around the world for a two-day celebration of electronic pop, drone, noise, and even a bit of performance art. While the full event is worthy of your attention, the can't-miss acts include Stockholm electronic artist CoH, whose scratchy, skittering instrumentals sound like decommissioned robots attempting to communicate; the unbound, computer-based explosions of Cameron Shafii; local hero Gordon Ashworth's emotion-rich compositions that blend American Primitive folk and dark waves of sound; the creepy sonic sculptures of Portlander Bob Desaulniers; and the fractured house beats of Brandon Nickell. ROBERT HAM