"All the songs should be a picture you can look at with the aim of screwing with your perspective," Charlie Saufley of Assemble Head in Sunburst Sound told The Stranger last year. At that, these San Franciscans succeed. Like fellow NoCal astral travelers Comets on Fire, Assemble Head unspool serpentine, fuzz-intensive guitar, bass, and keyboard riffs laden with a hallucinogenic payload. Their music doesn't reinvent the psychedelic-rock wheel, but polishes its spokes to a brilliant sheen. (Comet Tavern, 922 E Pike St, 322-9272. 8 pm, $6, 21+.)