This Ludicrous Machine Makes Music with 2,000 Marbles
The Wintergatan Marble Machine is a musical box unlike anything you have ever seen before. It was built by Swedish musician Martin Molin who has long had experience with esoteric instruments. The device comprises 3,000 wooden pieces and over 2,000 steel marbles. As Molin turns the crank, thousands of marbles churn through the machine and activate vibraphone, bass, kick drum, cymbal and other instruments that play a score programmed into a 32 bar loop.
Molin began work on the marble machine in August 2014. It was so complex that the building process took 14 months. The musician shared much of his progress in regular video updates on his YouTube channel. I recommend to visit the channel and watch (and listen) his incredible Wintergatan Marble Machine below.