Left Field Labs hosted a project called Music Drop allowing 3D printing enthusiasts to generate tunes online. The app would produce STLs of music discs to be used in a 3D printed music box.  Unfortunately, LFL has shut down the site to what looks to be for good.

When you thought dragons would never be seen in Westeros again - I generated a disc of the intro music to Game of Thrones and published it along with an egg shape version of the tear drop case.

It's a tricky print, but neat once all the pieces come together. I'll paraphrase the original instructions and parts list, but you may find like I did a few alternatives along the way.

Parts & Supplies:

• 3D printed parts, obviously
• A fork from a music box (a fork that has notes of Ab Bb Db Eb F Ab Bb C Db Eb F F Ab C Db Eb Eb F)
• 2 machine screws with 4 nuts. Original instructions call for 4-40 x ⅜", I think I used M3s x 10mm.
• Super glue
• Sandpaper
• Needle nose pliers
• Patience

Assembly

[Case - getting ready]

On the case, find two holes and place 2 pan head machine screws from the back. Use the screw nuts to hold both screws. As you can see in the picture, I put the screws in the other way with the fork, washers as spacers, through the case and nuts behind it.

[Handle]

Put the knob(small sphere) through the handle and glue the small cap in.
Glue the square of the handle to the square hole on the small gear. (**make sure the pole of the handle is positioned at the center of the small gear.)
Place the handle at the bottom of the case. (*when placing the handle, slightly push the half-circle plate in to avoid breaking the axis of the small gear.) When test-spinning, the handle has to feel smooth and quiet. - if it’s too tight and squeaky, try sanding the handle pole where it spins and touches the case.
After making sure it spins smoothly, glue the cap to fix the handle.

[Disc]

Place the big gear on the pole so that the gear sits on the triangle of the pole. (*match the square under the gear to the triangle.)
Glue the top surface of the gear and place the disc on the pole.
After it’s dried, place the pole in the case and snap the disc between 3 fixers in the case. (*Squeeze the case if necessary)
Place the fork through the screws and align it correctly with the music you created. (*Reference your music grid from the website - note: the website grid is missing 12th, 16th, 17th, 18th notes from the fork)
Screw 2 nuts to hold the fork in place. (*Eventually the order of the screws will be: screw - case plate - nut - fork - nut.)
Enjoy your music drop!