Ms. Kammen has spent well over half her life exploring the worlds of early and traditional music. A member for many years of the early music Ensembles Alcatraz and Project Ars Nova, and Medieval Strings, she has also worked with Folger Consort, Sequentia, Hesperion XX, the Boston Camerata, the Balkan group Kitka, the King's Noyse, the Newberry Consort, the Oregon, California and San Francisco Shakespeare Festivals, and is the founder of Class V Music, an ensemble dedicated to providing music on river rafting trips. She has performed and taught in the United States, Canada, Mexico, Europe, Israel, Morocco, Latvia, Russia and Japan, and on the Colorado, Rogue, Green, Grande Ronde, East Carson and Klamath Rivers.
Ms. Kammen collaborated with singer/storyteller John Fleagle for fifteen years, and performs now with several groups: a medieval ensemble, Fortune's Wheel: a new music group, Ephemeros; an eclectic ethnic band, Panacea; an English Country Dance band, Roguery,the early music ensembles Cançoniér and In Bocca al Lupo, as well as frequent collaborations with performers such as storyteller/harpist Patrick Ball, medieval music expert Margriet Tindemans, and others. She has taught summer music workshops in the woods, coached students at Yale University, Case Western, the University of Oregon at Eugene, and taught seminars at the Fondazione Cini in Venice, Italy and the Scuola Cantorum Basiliensis in Switzerland.
Ms. Kammen has played on several television and movie soundtracks, including O, a modern high school-setting of Othello and The Nativity Story, and has accompanied a diverse array of artists in recording projects, among them singers Azam Ali and Joanna Newsom. Some of her original music can be heard in an independent film about fans of the work of JRR Tolkien.