How music boxes are made - GIF

[Ralphxyz]

How are the splines made/added?

[BuffaloJohn]

How are the splines made/added?

The music making parts?

[Ralphxyz]

Yeah, the little pins sticking up on the roll! How are they made/ fixed to the roll?

[BuffaloJohn]

Yeah, the little pins sticking up on the roll! How are they made/ fixed to the roll?

There is a roll of wire, it is held in some form of jaws, it is pushed into the hole. The hole is probably undersized a few thousands, so it goes in and gets wedged there.