The music machine took 14 months to make, after Molin anticipated it would take two months. After growing difficulties towards the end, the music box is finally complete.

"The closer the machine gets to be finished the harder it gets to finish it. It is strange how that happens, when the finish line is in sight, everything slows down automatically except the avalanche of new unforeseen problems," the Wintergatan team said in an update earlier this year.

"We need to start making music now and spend less time picking up marbles from the floor."