Buddy & Julie Miller helped shaped the songwriting and sonic sensibilities of the Americana scene with the solo and duo albums they released throughout the 1990s and into the 2000s. Then she took a break from the spotlight, while he accepted a series of high-profile gigs as a producer and sideman. Breakdown on 20th Ave. South, their first album together since 2009, marks the return of their beloved collaboration. Much of the album was recorded in their cozy living quarters with very little outside assistance. Its dozen tracks showcase the common language they’ve forged out of Appalachian folk harmonizing, singer-songwriter confessionalism, down-home country soul and ropy roots rock grooves, and, most of all, the interplay between Julie’s penetrating sincerity and Buddy’s empathetically yielding musicianship.