Marty Stuart and His Fabulous Superlatives perform a Tiny Desk concert at NPR Music in Washington, D.C. Photo: Estefania Mitre/NPR hide caption toggle caption Photo: Estefania Mitre/NPR Marty Stuart and His Fabulous Superlatives perform a Tiny Desk concert at NPR Music in Washington, D.C. Photo: Estefania Mitre/NPR Hosts Bobby Carter and Anamaria Sayre present a string extravaganza! There's some bluegrass, some country, some folk — and some sounds that we couldn't possibly label even if we tried. We'll hear sets from the unclassifiable Goat Rodeo group, Americana master Rhiannon Giddens and Nashville legend Marty Stuart . Look for Tiny Desk Radio on your local NPR station. Yo-Yo Ma, Stuart Duncan, Edgar Meyer And Chris Thile: Tiny Desk Concert YouTube Rhiannon Giddens: Tiny Desk Concert YouTube Marty Stuart and His Fabulous Superlatives: Tiny Desk Concert YouTube Tiny Desk Radio is produced by Walter Ray Watson, Alina Edwards and Noah Caldwell.…