Mezzo-soprano Christa Ludwig coaches mezzo-soprano Diana Yodzis and pianist Marek Ruszczynski on Mahler's "Wo die schönen Trompeten blasen" from Des Knaben Wunderhorn. Visit bit.ly/1nxfw1S for more vocal master class videos. As part of The Song Continues, young singers are mentored by one of the most significant and distinguished mezzo-sopranos of the 20th century, Christa Ludwig. Observe this public master class, part of Marilyn Horne's celebration of the art of song.