This find is truly amazing.
Hailing from Sweden, musician Martin Molin has created an immensely complex device that utilizes the raw force of 2,000 marbles to create layered and dynamic music. Falling through the intricate wooden pulleys, levers, funnels and ladders, the marbles create wonderfully synchronized melodies, bass lines, percussion and more with incredible grace and fluidity.
By turning a simple hand crank, the machine loads marbles into an above filtering system, forcing them into the property cavities. As they fall through the machine, they are divided between a marimba, kick and snare pads. The machine can even be tuned to different keys while playing. 
The machine took Molin 14 months to complete, and began from one 3D-printed, 80 centimeter cube. From there, it grew outwards to become the finished product that we see in the below video.
“The marbles, you know, they behave like water. The nature of water is that it just breaks through everything. After 100,000 years it can make a hole in stone. The marbles act like that, it doesn’t matter what I’m doing to try to tame them. They are just flooding every wall I’m putting up. … I’ll have to fix some escaping marble issues in order to tour.”
Watch the machine in action below, and look forward to Molin’s eventual tour.
Source: Wired
