Talented musical instrument designer Ranjit Bhatnagar has create a vast range of instruments over the years as a hacker and multi-instrumentalist — most notably in his annual Instrument-a-Day February design challenges.
Here is one of his instrument experiments, exploring panpipes. See the photo at bottom for the earlier experiment that got him started — Wienermobile Panpipes by Ranjit:
After I added the tapered mouthpiece to the whistles, and with the hotdog-red ABS, these things remind me of a toy wienermobile I used to have. Thus the name.
This panflute is slightly more practical than the one it’s derived from. The curved shape is easier to use than the circle, and I added a bit of taper to the mouthpiece to make it easier to blow on a single whistle. Still not a practical musical instrument, though!
This one has a diatonic scale (CDEFGABC) instead of chromatic like the other one. I had to learn the OpenSCAD lookup() function for that!