Tune in to hear Scott Nygaard (known for his work with Laurie Lewis, Tim O'Brien, Darol Anger, the Websters, and Crow Molly) and Teja Gerken (a solo fingerstyle virtuoso) weave their acoustic six-string instrumental magic in the KPFA studio and talk with host Derk Richardson about their music. It's a preview of their Guitar Summit show, which will also feature daring Turkish classical guitarist Mesut Özgen, Friday, February 20, at the Freight & Salvage Coffeehouse in Berkeley.