CASPA AND TROLLEY SNATCHA'S DUBSTEP POWER MOVES

The Dub Police North American Tour powers into Seattle tonight, led by London DJ/producer Caspa, the self-proclaimed "dopest ghost in town." On 2009's Everybody's Talking, Nobody's Listening, Caspa combines ruffneck beats and vivid textures with deft dynamics and brazen tunes that stick in your noggin. It's a nice balance of mainstream and underground elements. This year's Alpha Omega boasts a bigger-budget-sounding wallop in the beat department, so those kids in the upper deck can headbang to it with more authority. It's a more accessible collection of stadium-friendly anthems; Caspa smelled all that filthy EDM lucre and couldn't resist fattening up/dumbing down things. Fellow London producer Trolley Snatcha peddles pummeling dubstep whose evil vibrations are so over-the-top, they make Skrillex jealous. With Subscape and J:Kenzo. Neumos, 8 pm, $20, all ages.

FOOTWORK IT OUT TO DJ RASHAD, DJ SPINN, JIMI JAXON

DJs Rashad and Spinn are dominant forces in Chicago's footwork scene (footwork's an accelerated elaboration on that city's ghetto-house genre). Their hyperkinetic, fidgety rhythms and repetitive, staccato R&B vocal samples converge into frenetic workouts for body and soul. Check out Rashad's "Drums Please" from his Rollin' EP or "Double Cup" from the album of the same name for stellar examples of footwork's trademark speedy and intricate beat programming. This music is stripped way the hell down and so ready for action. Seattle DJ/producer Jimi Jaxon has shown impeccable taste in the DJ sets I've seen him do, including opening for Spinn and Ikonika at this year's Decibel Festival and for Bok Bok in May. His left-field, bass-centric, rapid-rhythm selections make him a perfect opener for this bill. Crocodile, 9 pm, $10 adv, all ages.

RUSTIE'S BYZANTINE SONIC SURREALISM

Glasgow, Scotland, producer Rustie cranks out some of the world's most byzantine sonic surrealism. Working in the hectic nexus between avant-hiphop and future-bass music, Rustie creates tracks that somehow reference Squarepusher and ELP, OutKast and Amon Tobin. On the 2011 album Glass Swords, Rustie surfeits your pleasure principles, building each track into a 17-layer cake of sparkling synth textures and origami beat configurations. It's luxurious and kind of taxing, like having sex while trying to solve a difficult trigonometry equation. With Dutty Wilderness. Barboza, 8 pm, $16 adv, 21+.