The Ozark Mountain Daredevils sound could probably be most simply described as country rock, similar to groups like Pure Prarie League, the Marshall Tucker Band and Crosby, Stills, Nash and Young. The enjoyed mainstream popularity in the 70's using mainly country instruments (banjo, fiddle, harmonica) and sweet vocal harmonies to make music outside the traditional country sound. I think their greatest commercial success was a single release in (I think 1974) called "Jackie Blue".