Collaborative pianist Martin Katz coaches countertenor Brennan Hall and pianist Marek Ruszczynski on Wolf's "Nachtzauber." Visit bit.ly/1nxfw1S for more vocal master class videos. The bond between singer and pianist is essential to a great vocal recital. As part of The Song Continues, young singers and pianists strengthen that musical connection when one of the respected authorities on collaborative piano, Martin Katz, brings them together in this public master class.