At last I've made my own PVC-flute. So funny, really cool thing. 0.57 meter long tube with 6 finger holes and one embouchure. It was used http://www.cwo.com/~ph_kosel/flutomat.html to calculate drill diameter and hole positions. Pete, thank you very much! The sound is very interesting (and what is more valuable - have correct pitch). Unfortunately my asus notebook once again broke its web-cam drivers so I had no option to make video.