Lilian's question on whistles:
I would suspect that Soodlums whistles are mass produced such that
manufacturing tolerances are not held to tight specs. and
inspection is by sampling or non-existant. So there may be slight
burrs at the holes and end on the inside of the tube, or the thing
may be slightly out round, or the diameter might vary from one to
another. They still would look identical to the naked eye.
Handmade, and therefore more expensive instruments, would not
have these 'defects'.
This is only a guess. Anyone try to swab the inside of a
'scratchy' whistle with emory cloth?
Ted [log in to unmask]