On Gary Burton's debut release on Mack Avenue Records, Common Ground, the Grammy-winning pioneer of the four-mallet technique of playing the vibes is not only delivering his first studio album since 2005, but is also introducing his latest band. Well-known throughout his five-decade career for his quartets (beginning with his 1967 group featuring Larry Coryell, Roy Haynes and Steve Swallow), Burton is returning to the configuration for the first time since the mid-'90s.