Country bass man Peter Sternberg can slip the perfect bottom line into just about any track. The slippery funk-pop syncopation of the Brothers Osborne’s “A Couple Wrongs Makin’ It Alright,” the trad-country tenderness of Donny Fallgatter and Kree Harrison’s duet “Keith Whitley,” and the down-and-dirty bluesiness of Colleen McFarland's “Ten Years” are all in a day’s work for the man who makes the low notes matter.