With a name inspired by Roman Polanski’s 1968 disturbing treasure Rosemary’s Baby, it’s no surprise Nashville’s All Them Witches have a dark and ominous sound. Formed in 2012, Michael Parks, Jr., Robby Staebler, Ben McLeod and Allan Van Cleave released Our Mother Electricity that same year. Instantly, they began work on their 2013 follow-up, Lightning At The Door, a near-masterpiece recorded live in just a few short days with producer/engineer Andy Putnam at the helm. Their bluesy, psychedelic sound has propelled them to stages with punks Broncho and up-and-comers Windhand, as well as radio station WRLT’s summer “Live on the Green” concert series and Scion’s Rock Fest. The men of ATW claim a supernatural mysticism is at work while they write music: they hit the studio and the music produced comes so naturally, it must be the work of an outside force. Their after-dark slot on the SXSW showcase is set to be a thrilling show all its own.