The 3D premiere of Star Wars Episode 1 in early 2012 was a cinematographic milestone for the Star Wars saga. To celebrate the milestone, LEGO along with ad agency Serviceplan Munich created a unique 3D LEGO sound installation that actually played the Star Wars main theme song.
The installation comprised of a huge barrel organ on which four Star Wars worlds i.e. Hoth, Tatooine, Endor and the Death Star were built onto it with over 20,000 individual LEGO pieces. When the organ turned, the pieces touched mechanical sensors that in turn struck keys of a built-in keyboard.
You can also play the organ yourself, and hear the original sounds directly via the web at https://legomen.de/entertainment/builders_of_sound.html