"invariably requires the inner bore to be perturbed by someone who knows what he's doing"

As a whistle player for some years, I'm often perturbed (even the audoience is at times, if not bored!), but the instrument is apparently not affected... :-)

Isn't music really all about perturbing one's inner bore?

I have a Overton 'Low Whistle' which is a fippled pipe with no fingerholes. It is played by overblowing and cupping the hand around the end hole. A mongrel to play... :-()

Robin