It's a demo of my dad's new Voice Box (harmonizer/vocoder) as performed by a pair of really talented folks I found via YouTube (I found Jack and Nataly when researching user-generated videos for the new EHX site).Voice Box Demo by Jack Conte and Nataly Dawn
The Voice Box's harmonizer is vaguely like Songsmith, in that you feed it a mic and an instrument, and it can then create multipart vocal harmony -- the vocoder is totally different, it give more of that robotic man-machine sound.
Read more in Music at Boing Boing
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects