NASHVILLE SOUNDJason Isbell took solo credit on his breakthrough albums Southeastern (2013) and Something More Than Free (2015), while 2017's The Nashville Sound is credited to Jason Isbell & the 400 Unit. Give the album a spin and it doesn't take long to figure out why. While this is as impressive a showcase for Isbell's talents as a songwriter and vocalist as his previous two albums, this set delivers a richer and more eclectic sound, and this time around, the