Sopranino folk whistle
by pfh, published
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I had some problems with instruments being too tight, it's quite dependant on good calibration of the printer, so the tolerance all around is 0.35mm, which is fairly generous. It also lets you put something that will tend to prevent leaks in the gap. I'm recommending blue teflon tape. Waxed string would be traditional (or cork, with a larger gap).
I printed one on my Replicator @ at 0.27mm with 10% infill.
It doesn't fit together tightly? Else it came out nice.
I think it's likely a leak somewhere below (or possibly above) those first few holes, either in the join or the wall itself. Try some blue teflon tape or wax in the join, and try coating the bore with something to close any tiny holes. I've used hairspray in the past! I imagine any sort of enamel or paint spray would work.
Taping the end shut will definitely make it sound more easily. However it won't be in tune!
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The generously large holes help with expressive techniques such as sliding, cutting, and tapping. The trick with this kind of instrument is to never stop blowing. It's meant to be raw and wild, it's all about analogue glitch.
In order not to cause pain to people of a delicate disposition, this instrument should be played outdoors.
The joints have 0.35mm clearance all around. They need to form a tight seal. Blue teflon plumbing tape appears to work quite well for this.
Even tiny holes can cause an instrument not to produce sound, or to only produce high muffled sounds. If it isn't working, this is one likely reason.
It is also possible to make this instrument by milling wooden pieces and gluing them together. This is a little more involved than 3D printing, so email me if you are interested in doing this.
I expect to refine this design. The pitch may be slightly off A440. I also expect that various parameters of the whistle shape can be improved on.
This instrument was designed using a software package called "demakein", more information here: logarithmic.net/pfh/design
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