Question: Is there any kind of flute or whistle that is simpler than a simple system flute?
Answer: Well, as it turns out, yes there is. Known as the N’dehou, it is an end blown single note Pygmy flute that is made of bamboo.
Question: What can be done with one note?
Answer: One could mimic birds I suppose, but it turns out that, in the hands of the right person, much can be accomplished with a single note flute. A great exponent of the N’dehou is the Cameroonian composer, writer, and musicologist Francis Bebey (1929-2001). In the video below he demonstrates what a creative musician with a N’dehou might be capable of. In his words, it is a form of conversation that takes place between the flute and the player.
How joyful!
On behalf of 
Sunday August 05 also happens to be Martin’s birthday – he has seen 67 summers and looks 50! Happy birthday and congratulations Martin! Thank you for the many good and great qualities that you offer to the world through what you do and who you are.