In 1971, Sam Bush and his Bluegrass Alliance mates - Ebo Walker, Courtney Johnson, and Curtis Burch - formed the New Grass Revival, issuing the band's debut, "New Grass Revival". Walker left soon after, replaced temporarily by Butch Robins, with the quartet solidifying around the arrival of bassist John Cowan. "There were already people that had deviated from Bill Monroe's style of bluegrass," Bush explains. "If anything, we were reviving a newgrass style that had already been started. Our kind of music tended to come from the idea of long jams and rock-&-roll songs."