"Put some blue tack at the bottom of the head (push it with a pencil, for instance). Then scrape the blade a little bit in order to erase the small irregularities, with a nail file. It improves the sound of the high octave."
A place to discuss whistles,their makers and performers/performance. Anything whistle related is ok, keep in mind that opinions could vary in the extreme without one being more worth per se than the other, so keep it nice and polite.See More