Printed the file split_pokeflute_2.stl
It doesn't join up neatly or play properly.
It's a prop not an instrument
Sorry for the connection problem...
As of now I don't really have access to a 3D printer so I can't alter the design to make it fit.
However, other makers (pokemongirl) responded and said that the thing does indeed make a sound( your make uses a mouthpiece from a recorder file).
If you could sand the edges with a file and glue them to fit, it should definitely work (or at least make a sound)