Old Crow Medicine Show

This rootsy Nashville string ensemble started as a group of buskers roaming through Canada before opening for Dolly Parton and becoming a fixture at the Grand Ole Opry and on A Prairie Home Companion. The group’s 1920s-style instrumentation is harmonica-laced and heavy on fiddle, banjo and slide guitar, and its members jam with an Appalachian-like muscle that can evade mainstream counterparts such as Mumford & Sons and the Avett Brothers. At the El Rey in May, they play behind last year's Carry Me Back.