Something ominous lurks in the shadows of Chris Schlarb’s music. On the surface, the atmospheric, guitar-based renderings by the self-proclaimed “composer, truck driver and cult leader” seem soothing. But the push and pull between harmony and friction colors his ambient, pastoral pursuits as if seeking shelter before a storm. There’s an outside folk feel to his John Fahey-inspired appropriations that haunts the ear by what it doesn’t say as much as what it does. For creepy placidity, no one does it better. Schlarb brings his Ouija board soundtracks to Plan 9 Music on Saturday, July 19. The spirit channeling begins at 1 p.m. Free. plan9music.com.