With each passing year, it seems, Oakland's Yellow Swans approach their synapse-searing electro-noise maelstroms with ever-greater subtlety and flair. Not so long ago, Pete Swanson and Gabriel Mindel Saloman were just two kids stirring up mindless, faceless CD-R rackets via their fledgling Jyrk imprint; today they preside over a growing stable of fellow travelers, tour internationally, appear on the rosters of numerous labels and wield their homemade sound rigs with the skill of surgeons or artistes. Psychic Secession begins with head-ringing tour-de-force "True Union" 20 delirious, multilayered minutes of treated, bell-like tone throb and flurried electronic drone gradually beaten into a thick, feral, foaming whirlpool. Swanson's anguished vocal is a phantom in the screeching, surging din. "I Woke Up" reimagines techno as a ravenous, mutant abomination bolting through a Brazilian rain forest full of tribal drum circles and terrified birds before morphing into a circa-1994 Nine Inch Nails remix. Synched hand-claps and drum-stomps march fearlessly into the dense, intricately percussive brush.