It works! youtu.be/S-z3_xKU77Y
While working with Cymon (who doesn't have a MakerBot) and NYCDESIGNER to try and get Cymon's Recorder design to work thingiverse.com/thing:11796 I decided I needed a little more SCIENCE! So I wrote a parametric OpenSCAD script based on the Whistle/Flute from ggwhistles.com/howto/ that allows you to experiment with different hole placement, size, window and lip angles, etc. This flute is much simpler then a recorder (and not nearly as pretty as Cymon's) but it is able to play 6 notes quite clearly and loudly. Now if only I knew how to play the flute...
This is still a work in progress because I think I can get the mouthpiece/lip to print a little easier. It's kind of fiddly to get it just right.