Digeridoos, Monks, Multiphonics, Chaos Theory

[Ingo Debus]

Ken Balys wrote:
> 
> I get the same effect by whistling at an anatomically neutral pitch
> like say middle C natural and on top of that humming as low a
> note as possible in my throat. If someone cannot hear the low
> humming you are making, it sounds like you are ring modulating
> your own whistle.

This seems to be similar to the technique the trombone player Albert
Mangelsdorff often uses.

Ingo