Printable alto recorder with focus on quality. It is tuned on F with A = 440Hz (modern tuning). It is completely printable on a RepRap printer (I own a Prusa i3).
The instrument is capable of producing two full chromatic octaves, as well as part of a third octave. It doesn't fully work straight out from the printer, though. It requires a bit of work before it plays nice.
The fingering is the modern "baroque" or "English" fingering used in modern recorders. Note that this fingering is slightly different from the one used in school recorders, the "german" fingering. Check this page for the full fingering: http://www.recorder-fingerings.com/en/F.php?t=aBar.2A.2g
If you want to build one, wait a bit until I write an instructable with the full instructions. Thanks for your interest!
Watch it working on this video: https://www.youtube.com/watch?v=PWLCowr-iUc
EDIT: I finished the instructables with instructions to make the recorder. Check it out now: http://www.instructables.com/id/Baroque-Alto-Recorder-in-F/
This instrument requires post processing to work properly! A home 3D printer can't produce the fine details needed straight out of the printer. You'll have to do a bit of filing, sanding and smoothing to get it to work to its fullest.
Check out this instructables for full instructions and details in the making process: http://www.instructables.com/id/Baroque-Alto-Recorder-in-F/