By the end of the 1960s, Scruggs was getting bored with repetition of the classic bluegrass fare. By now, his sons were professional musicians, and he was caught up in their enthusiasm for more contemporary music. He said, "I love bluegrass music, and still like to play it, but I do like to mix in some other music for my own personal satisfaction, because if I don't, I can get a little bogged down and a little depressed". Scruggs also wanted to play concerts in venues that normally featured rock and roll acts. Columbia Records executives told Flatt and Scruggs that they intended to try a new producer, Bob Johnston, instead of their long-time producer Don Law. Johnston had produced Bob Dylan's records. This new association produced "Changin' Times", "Nashville Airplane", and "The Story of Bonnie and Clyde" albums. Flatt was not happy with some of this material — he didn't like singing Bob Dylan songs and refused to perform them, saying "I can't sing Bob Dylan stuff, I mean. Columbia has got Bob Dylan, why did they want me?". Even the success of the "Bonnie and Clyde" album was not enough to prevent their breakup in 1969. After the split, Flatt formed a traditional bluegrass group with Curly Seckler and Marty Stuart called The Nashville Grass, and Scruggs formed the Earl Scruggs Revue with his sons.