Sunset Rubdown’s batshit-crazy music boggles the mind and confuses the soul. Your blabbermouthed uncle who sits in his rocking chair telling made-up war stories might listen to it. So might that hipster down the street with a closetful of American Apparel tees and a pair of headphones bigger than your dog. This isn’t music for the masses. Wolf Parade’s Spencer Krug formed Sunset Rubdown as a side project, and with the assistance of three (this time four) other musicians, he’s released three albums under that name. The music often sounds like a mish-mosh, with screeching electric guitar sneaking between playful keys, stampeding drumbeats, and Krug’s hyperventilating vocals. But when the songs lose structure, they come off sloppy and boring. Still, “Idiot Heart” almost makes up for those tunes. Its muted guitar and jagged electric bursts are brought to life by a barrage of bells and playful lyrics about Greek myths and dying in “a decent pair of shoes.” The first few tracks on Dragonslayer are satisfyingly complex — reason enough to (temporarily) sacrifice your sanity.