Bassoforte
(vimeo link) Diego Stocco (previously at Neatorama) combined parts from a bass guitar and a piano to make a new musical instrument he calls a bassoforte. http://www.behance.net/gallery/Bassoforte/535175 -via Metafilte...
https://www.neatorama.com/2010/06/19/bassoforte/