Fifteen years into their close and literally harmonious relationship, Joey Ryan and Kenneth Pattengale sound as satisfied and enriched as ever by the audience and aura they’ve established in Americana music. The Milk Carton Kids name was a self-effacing joke about how quickly they expected to be forgotten, but it’s been quite the opposite. They’ve earned four Grammy nominations and an Americana Award as Duo/Group of the Year. Audiences still lean in to hear the nuances of their quiet and thoughtful sound. Their seventh album Lost Cause Lover Fool is the latest iteration of their less-is-more approach to folk artistry.