T hose thus far unaware of Shovel Dance Collective’s bracing approach to folk should probably note that their third album is not much interested in breaking newcomers in gently. Everything in Readiness kicks off with a three-song suite that lasts more than 10 minutes and takes you, via a series of dramatic sonic jump-cuts, from a grinding one-note drone to a reel that seems to split the difference between trad folk fiddle-playing and the punishing squall of the Velvet Underground’s Black Angel’s Death Song. It then leaps to Tally Ho! Hark Away!, which sets a hunting song first collected in the late 1940s over a blast of what might best be described as ecstatic noise.…