I totally agree with Alison. I have a tunable susato high D and it is pretty horrible and out of tune in the high register. The only benefit is that it is loud and useful for competing against melodeons etc and in pub sessions. You have to blow in aparticular way to get it in tune higher up the scale but I'm not happy with it. I'm afraid I've rather reverted to the good old generations plus a good mike or a microvox pickup although I like the sweettones to. I have a wooden whistle which has a recorder like tone - nice for old english tunes or french bourees. I tried out a sharp F metal one and it cut my mouth to ribbons so I wouldn't recommend that either.Is that helpful???
Sarah