About a year ago I got three Susato whistles, but it took me about eight months of practicing to want to brung them to a gig on account of the upper-octave-syndrome. My ex-boyfriend, who got them for me, said "You just have to be positive!" And that is true. You have to be positive when hitting the high notes. Spit them out! The Chieftain's, Soodlum's, Kerry's and Overton's that I have are much easier. I can almost "slide" into a higher note, but not so with the Susato. With them I have to be very decisive about the high octave.I struggles with them for a long time, but now, I wouldn't want to play any other whistle at a gig or a session. They are loud, and the difference in volume between the low and high octave is not as big as with other whistles I have tried.
Magpie