Winterbloom is Meg Hutchinson, Antje Duvekot, Anne Heaton and Natalia Zukerman. Asia Kepka hide caption

itoggle caption Asia Kepka

The vocal group Trio Mediaeval sings old and new Christmas carols from its native Norway in NPR's Studio 4A. Asa M. Mikkelsen hide caption

itoggle caption Asa M. Mikkelsen