Comment by eth0up

I had excellent results using a large section of black bamboo, though I forget the exact taxonomy (lako?). I meticulously beat out the segment walls, then with a rasp fastened to a long stick, filed down the ridges. After sanding, I finished it with oil based stain, which necessitated it living outdoors for a while. In the end it proved a fine primitive instrument. I gifted it to someone and miss it. I can attest to the therapeutic effects of mastering the didge.

PVC works, but the acoustics do seem superior with actual plant material. Certainly the feel.

Update: I used beeswax for the gob hole.