That's a song called "Little Black Train" recorded in 1930's by a group recognized as the first family of country music, the Carter Family. A.P. Carter wrote it, and he sings it here with his wife, Sarah, and sister-in-law, Maybelle Carter. Fast-forward to the present day. Another member of the family has put her own spin on the song - Maybelle's granddaughter, Carlene Carter.
The Infamous Stringdusters' members have been a major part of the bluegrass world since their debut, Fork in the Road, back in 2007. Now on its sixth studio album, Let It Go, the group has just returned with more great progressive acoustic music.