Listen to the instrument da Vinci invented but never got to hear

Pianist Slawomir Zubrzycki and the viola organista
Pianist Slawomir Zubrzycki presents the "viola organista" on Oct. 18 in Krakow, Poland. Zubrzycki spent almost four years building the instrument, which is based on a late 15th-century design by Leonardo da Vinci.