|July 12th, 2015|
That's a 5' overtone flute in A. It's six times the length of a standard D whistle, so the lowest note it can play is two and a half octaves lower, at 110 Hz. The flute is very narrow for its length, though, so it's extremely quiet playing that note and instead is much more at ease when playing overtones.
The available notes are all multiples of the base frequency:
I'm not very good at playing it, but it sounds like this: mp3.