UPDATE 05.19.2010: We're on MAKEblog!!!!1
i've built two didgeridoos, with extension pipes to change the pitch. With a 2nd player, we'll be able to play chords together.
1pm Getting the pipe lengths...
SpeedOfSound = 340 m/s = 13385.826 in/s Freq = (2^(n/12)) � 440 Hz (where n=0 for A4 (440hz)) Length = (SpeedOfSound / 2 * Freq) + interior radius of tube Note | Freq (Hz) | Length (in) ------+----------------+----------- G | 97.9988 | 69.29572751 ((13385.826 / (2 * F) ) + 1) G# | 103.8261 | 65.46278389 A | 110.0000 n=-24 | 61.84466364 A# | 116.5409 | 58.42968569 B | 123.4708 | 55.20635615 C | 130.8127 | 52.16397453 C# | 138.5913 | 49.29255146 D | 146.8323 | 46.58211425 D# | 155.5634 | 44.02381029 E | 164.8137 | 41.60888638 F | 174.6141 | 39.32976165 F# | 184.9972 | 37.17849479 G | 195.9977 | 35.14786375 G# | 207.6523 | 33.23139194 A | 220.0000 n=-12 | 31.42233182
After much measuring and sawing
Worried about chipping paint, I started looking around for the best way to color PVC plastic in a permanent fasion.
I saw a webpage saying you could permanently dye PVC using RIT fabric dye. Great! no paint to chip (or so I thought). So I got a couple bottles of "wine" (deep red/burgandy) color. Found a big box, and put plstic drop cloth in it to make it water tight. filled it up with hot water, poured in the dye and put in the tubes (carefully so they wouldn't splash). Waited 24 hrs...
well. the tubes didn't get dark at all.
I now have a PINK didgeridoo. YUK.
further, the cleanup on the dye was crazy messy. i mean, what do you do with all this super staining red liquid...? down the drain it went. 1 bucket at a time, bailed out and carried through the house (closest drain)...
Ok, time for the backup plan. Krylon Fusion plastic spray paint. And some clear Laquer to protect the finish.
In my ever constant worry about chipping paint...
Added a bumper to the horn end of the base tube (the part you rest on the floor while playing).
Should protect it from chipping/scratching up the red paint...
The white bumper is made from a 2" coupler that I sawed in half
11:30pm Time to paint the stripes on the didj (remember I'm copying this design).
2:13pm Well, that's a lot of stripe painting. was a lot of work, but these are really looking good... I love the base color, how mottled it looks. Just like a bing cherry. Organic is quite a proper look for this instrument...
7:00pm My thought had always been to mark on the tubes what note they were. I thought I would engrave the text using a CNC machine, but gave up that idea for something simpler and more organic... a white paint pen.
So today, I went to the art store and acquired a white oil-based paint pen.
1:00pm Finished off the tubes by applying a few more coats of clear laquer. This should make the Acrylic white/black stripes stronger and resist scratching.
fun project, easy to cut the tubes and get instant gratification blowing sounds into them... the paint was the hard part, and the dye idea was a disasterous dead end. in the end, I think I have a nice set of pipes to play with, and I can't wait to play didj-chords with a 2nd person.
from what little I've played on them, they don't really sound like a real didj, at least, the ones i've heard in person and on youtube all have a much grittier ever changing sound. Most of that is me. I don't really know much technique beyond getting a sound, at the moment. So hopefully I can coax some of those sounds out in the future.
need to learn to play :). I can blow sounds, and do a little circular breathing, but there's some techniques yet to master. and... I still want an alpine horn like Hernan's...
Time to organize the pipes, there are too many, and the cardboard wine box with dividers I had them in was looking ratty.