Nathan Salsburg worked with Rayna Gellert on arranging and performing traditional and original songs for her Old Light collection. You can stream and purchase selected tracks at Bandcamp and buy the full album at Amazon.
A curator of the Alan Lomax archive, Salsburg is doing great work in keeping traditional music alive. He was interviewed on this fascinating episode of WFPK After Dark, which features recordings from the archive. Salsburg also exhibited his talents on this NPR Tiny Desk Concert, and his debut album as a solo performer, Affirmed.