"Hemphill played an electric guitar in open D or open G, preferring open D.
Her playing ignores the standard 12-bar blues progressions and relies instead on the open chord tunings and repeated riffs typical of the folk blues of her native Mississippi. Hemphill’s guitar style is often described as idiosyncratic. Her open tunings are rhythm-powered and enhanced by an occasionally hypnotic drone. Her guitar style is overdriven, a little roughed-up and coarsely textured, but very natural sounding. There’s not too much in the way of turnarounds or doubling back. Her songs are driven by a relentless rhythm, powered by a fierce strum - with a slide up one string and down the next for accent. Hemphill plays way up the neck, with both barred and fingered chords, and bends a string when the mood strikes her. The stomping guitar parts act as a rhythmic echo to the words and percussion."
Barbara Flaska - "The High Water Mark Keeps Rising"
via Jessie Mae Hemphill Foundation website