Wintergatan

Wintergatan (, "the Milky Way", ) is a Swedish folktronica band from Gothenburg. Martin Molin and Marcus Sjöberg were previously part of the former band Detektivbyrån. The band uses a variety of unconventional instruments including the Modulin, a fingerboard-controlled synthesizer built from Doepfer eurorack modules, the Moog Theremini digital theremin, an electric autoharp, a hammered dulcimer,
a self-built punch-card music box, a slide projector, a musical saw, and a typewriter for use as percussion.
The band's members all play various instruments, but have primary specializations. Martin Molin specializes in the vibraphone as well as the electronic instruments that define Wintergatan's sound; Evelina Hägglund specializes in keyboard instruments; David Zandén specializes in bass; and Marcus Sjöberg specializes in drums.
The band released their first track in late 2012, titled "Sommarfågel", and released their debut album "Wintergatan" in 2013. The band toured with the album around Sweden in 2014 and 2016; Julia Jonas substituted for Evelina Hägglund during some 2014 performances.
Marble Machine.
Between December 2014 and March 2016, the band uploaded several YouTube videos featuring Martin Molin documenting the construction of a music box that uses marbles to play instruments. The machine is powered by a hand-crank, and works by raising steel marbles through the machine into multiple feeder tubes, where they are then released from height via programmable release gates, falling and striking a musical instrument below. Instruments played by marbles striking them include a vibraphone, bass guitar, cymbal, and emulated kick drum, high hat and snare drum sounds using contact microphones. The music score is stored on two programmable wheels that utilize Lego Technic beams and stud connectors to trigger armatures to release the marbles. A final music video showing the machine in use was released in 2016, and has been viewed over 171 million times.
Ten months after the debut of the original Marble Machine, the band announced their plans to make a new marble machine for the purpose of touring. The new machine, to be called "Marble Machine X", would solve a multitude of mechanical functionality problems with the original Marble Machine. Martin Molin, the builder of the original Marble Machine, is collaborating with a team of engineers and designers as well as fans for the design and build of the Marble Machine X. The original Marble Machine is now back in his possession after being exhibited in Museum Speelklok in Utrecht, the Netherlands.