Remember the insane marble machine instrument that took the internet by storm a few months ago? The designer, Martin Molin of Wintergatan, just built two new instruments and recorded a video where he uses both to perform an original composition titled All Was Well. The first is a rather complex take on a traditional music box that uses punched paper-tape to control individual notes, and the second is something he calls a Modulin. The Modulin sounds a lot like an electronic theremin but seems to have an interface like a stringed instrument. Molin has also started releasing additional videos that explain how to built the music box.