Del McCoury and David Grisman — two pillars of modern bluegrass, one purely traditional, one endlessly exploratory — made three acoustic duo and quartet records across a decade that captured their mutual affection and the unguarded pleasure of two masters playing for their own amusement. Recorded at Grisman's Dawg Studios in California with minimal overdubs and traditional material, the collaborations offered fans a rare window into how these two approached pre-Monroe song repertoire.