how to play didgeridoo for nicki flute.
That site has lots of info, but some of it makes better sense AFTER you know what to do
The "lip buzz" is definitely a very loose raspberry sound...hold your mouth completely relaxed (but shut) and then start blowing steadily through your closed lips to make a "prprprpr" sound. It actually takes a lot of practice to keep this up for 10-20 minutes in a regular rhythm!
Now the embouchure. You can make a didge out of practically anything, even a vacuum cleaner pipe (wash it first...), but you need to build up the embouchure area. The practice one I saw was made with a beeswax compound - anything will do if you can make it pliable (with heat, kneading etc.) and then set it firm enough that it won't melt from contact with your skin (you're only in loose contact, so beeswax doesn't melt). Try modeling compound etc., as long as it isn't toxic.
Apply your modeling compound or whatever around the top of the pipe, then build up a small "wall" which gradually becomes narrower, leaving quite a big round aperture. You might want one side a bit flatter, just see what suits...at least at the beginning stages, it's by no means crucial to have it "just so". Size...make a ring with your thumb and forefinger and put it right round your mouthso that your fingers are sitting snugly around the sides of your mouth, but there is room above and below your lips - that should be about the right size.
Now get your prprprpr going, and gently bring the embouchure of the didge to your mouth so that the central lip area is within the embouchure circle. At first, you'll probably lose your "buzz" when your lips touch the embouchure, but keep it up...
Once you've got the buzzing going, you can change the tone by using a throat vibrato, or "speaking" into the didge.
Have fun...