constructed with readily available and relatively inexpensive modular plastic plumbing... inspired by the traditional Aboriginal instrument, but assembled at the Home Depot!
Step 1: Visit Your Favorite Home Improvement Warehouse
It doesn't have to be Home Depot, but I've found their Aerophones Section.... I mean, Plumbing.... to be rather well organized compared to the competition.
Step 2: Gather Pieces
One - 2" to 3/4" reducer bushing - Mouthpiece
Ten - 2" 90 degree Street Elbow - spiral
One - 3" to 2" reducer - Bell
Its a short shopping list... and its all you'll really need to get started!
In these pictures, I'm assembling it in the aisle at Home Depot... Starting with the mouthpiece, I attach the first elbow... with each added section, you want a slight 'twist' or offset to make a proper spiral. Unless, of course, you don't want to make a spiral... But I'm making a spiral. So here we go.
Step 3: Final Assembly
The white plastic (PVC) pieces have a nasty tendency to loosen up and fall apart over time, so I've glued mine together... which precluded its disassembly for photography. I also made one with black plastic (ABS) which retains good fit and stability even after repeated disassembly... but have since given it to friend, and when I went back to Home Depot to take pictures, they were out of stock... perhaps word is already out and people are making Spiro-Didges? There is a small price difference between the black and the white plastic, I'm not sure if one is always cheaper than the other... if you want to glue it into a permanent shape, it won't matter; but if you want to play around with different shapes, I recommend the black plastic (ABS).
A year or so ago, I made a video with the black Spiro-Didge, showcasing my fantastic skill... *note massive sarcasm in preceding statement*
Spiro-Didge video on MySpaceTV