They don't do it often, but when they do it's for good reason. Today Austin City Limits announced a rare double shoot on August 21, with Jason Isbell & the 400 Unit and Amanda Shires.

Jason Isbell and the 400 Unit’s,The Nashville Sound, debuted at No. 1 upon its release. As ACL noted in the press release for the tapings,  "Isbell has a gift for taking big, messy human experiences and compressing them into badass little combustible packages made of rhythm, melody and madly efficient language."

Not to be outdone, Isbell's wife and Texas native, Amanda Shires, will also be recording her performance that night. Shires began her career as a teenager playing fiddle with the Texas Playboys. Additionally she’s toured and recorded with music stalwarts such as: John Prine, Billy Joe Shaver, Todd Snider, Justin Townes Earle, Shovels & Rope, and most recently her husband.