Levon Helm and Joan Baez will appear at the Americana Festival and Conference in Nashville in September. Helm will perform a full concert at the Ryman Auditorium on Sept. 17. Helm is nominated for three awards by the Americana Music Association. He released the Grammy-winning album, Dirt Farmer, in 2007. In addition, Baez will accept the Spirit of Americana Free Speech Award at the Americana Honors & Awards ceremony at the Ryman on Sept. 18. She will receive the award from Steve Earle, who produced Baez’s forthcoming album, Day After Tomorrow, which will be released on Sept. 9.