With universal themes such as love, loss, happiness, oppression, suffering and defiance, Gustav Mahler's songs from Des Knaben Wunderhorn are some of the most profound ever written for the voice. Katharina Kammerloher and Arttu Kataja, acclaimed performers from the Berlin State Opera, plumb the depths and shallows of this music with vocal power and striking presence. Eric Schneider accompanies them, transcending the formidable piano part with great drama and expression.