"Mountain Stage," the syndicated, weekly public radio series will tape a tribute concert to John Hartford Sept. 24 in downtown Nashville. Artists confirmed include Earl Scruggs, Norman Blake, Kathy Mattea, Riders in the Sky, Jamie Hartford (John's son), Sam Bush, John Cowan, Tim O'Brien, Gillian Welch & David Rawlings and Vassar Clements. Hartford will perform during the concert. The event takes place at 7 p.m. at Legislative Plaza during Fest de Ville, a new three-day arts festival organized by the Tennessee Performing Arts Center (TPAC). The air date of the two-hour special has not been announced. Hartford, the 62-year-old banjo and fiddle player who wrote "Gentle on My Mind," is no stranger to the West Virginia-based radio program. The CD John Hartford: Live From Mountain Stage was released earlier this year on Nashville's Blue Plate label. Diagnosed with lymphatic cancer in 1980, Hartford has been in remission for most of the ensuing years. The last couple of years have been more difficult for him, with immune system and anemia complications. Another tribute concert in Hartford's honor was held in April in North Carolina during MerleFest. Tickets for the upcoming concert are $6 for adults and $4 for children 6-12; kids 5 and under are free.