Dual Mouthpiece

by Krrrl, published

Dual Mouthpiece by Krrrl Aug 11, 2010

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Dual Mouthpiece by Krrrl is licensed under the Public Domain license.

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In the spirit of Rahsaan Roland Kirk, we designed a mouthpiece for the Anarchestra that was supposed to play 2 instruments at the same time. Then we printed a prototype on a 3D printer in ABS plastic, and attached it to 2 homemade musical instruments. However, the experiment did not work. We could only get sound from one, but not both, of the instruments (from the pipe with the hole closest to the mouthpiece).

Perhaps we could get the mouthpiece to work by tweaking the design. Specifically, we might add a separator in the middle -- between the arc and the reed holder -- in the throat of the dual mouthpiece. That separator might be as thin as a razor blade, and would be added lengthwise (parallel with the blowing air, in order to avoid creating additional turbulence). Perhaps the 2 resulting new chambers in the throat cylinder would also have to be enlarged, for acoustical reasons.

(If one could print the dual mouthpiece in glass (or maybe see-thru plastic), he might blow smoke through the transparent dual mouthpiece to see the turbulence, and then redefine the design to get rid of that turbulence)

There are other flaws in the design:

  • The slope of the reed holder needs to be adjusted so that the reed fits snugly on the dual mouthpiece, without leaving a gap.

  • The housing of the reed holder section needs a slight bulge around its circumference, so that the metal reed holders can slip over the mouthpiece housing, and securely hold the reed to the mouthpiece.

  • Also the tip of the mouthpiece needs to be rounded slightly, whereas in our design the tip is straight.

Anyone is welcome to download the file and improve the design.

Rahsaan Roland Kirk: http://www.youtube.com/watch?v=aVU34lV3fVc#t=00m22s

Anarchestra: http://www.anarchestra.net/index2.php

More creations on my Posterous blog: http://krrrl.posterous.com/

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As stated before by caster66, this could possibly be used for different reed and instrument types. This can easily be made into a bi-bocal for bassoon, or something similar for oboe.

Considering how old this is this may not get read but you could possibly make this work by going with a different style reed. As was mentioned the air will take the path of least resistance. Why not switch to inline reed styles (i.e. bassoon, oboe, bagpipe chanter or drone) instead of the mouthpiece style you currently have pictured and have one reed in each channel after they have split from each other. I would think you would need a rather soft grade of reed though to be able to activate both reeds using only your breath.

First of all-- you automatically earn awesome points for the Roland Kirk tribute. I too play multiple instruments at the same time. Usually Tenor
amp; Soprano sax. However, whenever I try to bring in an Alto or other instrument in the mix, it becomes very difficult to hold them all. Maybe you could design a 3 neck "brace" or bracket of some type, so that they line up!

wonders if one could make an acrylic reed....

Hey Krrrl,

I'm afraid that making two tubes resonate with one initiator (reed, fipple, lip-buz) appears to be an impossibility. I often play multiple instruments (recorders, shawms, brass) at the same time. In my teens, I tried in vain to make a flute with one fipple make two chambers sound.

Everything I
've experimented with suggests that to get two tubes to resonate, you need two initiators. But you can set those initiators into motion with one mouth.

As I said, it seems to be a physical impossibility, but I don't know enough about physics to have the urge to prove it mathematically. While I th
ink you are jousting at windmills here, I would be very happy if you did make it work :)

Thanks for the feedback. That's what makes it all worthwhile.

I don't think that you can make this work without valves as the air will simply exit through the one instrument that currently offers the least resistence.

I think you would be better off making the junction much larger, more like a bubble with 3 arms. Otherwise you get the pneumatic logic effect that you describe.

Vik :v)