My neighbor has a 3d printer. For five pounds I bought the files to print a high D Qwistle, and emailed them to my neighbor.
Below is the whistle, just off the printer. It prints in multiple pieces: three barrels, a two piece mouthpiece, and three rings. My neighbor said he found that as the files were delivered they are two tight--even when he reduced the size of the tenons by 1%, They were still so tight that he had to really force them together. The tuning slide on this won't budge, for example. So he's tweaking it and printing another

Here's how it sounds: the mistakes are partly because it's new to me and the spacing is a little unfamiliar. I just got it ten minutes ago. It needs to be cleaned up and sanded a bit
Edit: I just noticed that the mp3 file got cut off somehow, and I didn't save it. so the song starts in mid phrase
http://spokeshave.net/music/moloney's.mp3I would say that it tends to clog quickly--you can hear it clearly at the end of the tune--but that may improve with some fine sanding. I'd say so far I don't like the feel of the very thick barrel
Anyway i think it's amazing and cool.