Trying to make flute
Both giving me NaN.
Thisis great http://www.ehow.com/how_7325964_hole-placements-flutes.html
I think this method is only for major scale. Mouth hole placement gives key of flute.
I think I can make same measuring from other mouth hole placements. I don't know how to measure
mouth hole placement for desired keys. I'm not sure how important is pipe length.
I know that longer pipe length makes flute sound lower.