Le Piano Vivant - Living Piano

In collaboration with the Festival d'Opéra de Québec, TFO (a Canadian French language educational and cultural public television station) brought opera to the people by inviting the public to engage with a new interactive and never-been-seen-before instrument.
The Living Opera Organ is a 12-note, giant keyboard that you play with your feet, featuring opera singers who elegantly belt out their corresponding notes as the different keys are played.

YouTube link
(thanks Cora)