Heart Chamber Orchestra - Pixelache from pure on Vimeo.

All musicians put their heart into their performance -- but not all so much as the members of the Heart Chamber Orchestra. In a collaborative performance created by music collective PURE and artist Erich Berger, 12 classical musicians are wired to electrocardiograms; as they perform, software translates the ECG signals to a visualizations that are projected onto the screen. The heartbeats shape the score and create the images, both of which become progressively more powerful as the musicians become more animated.

via FastCo Design