Quote Originally Posted by Mipi View Post
Thank to all.

I was googling a bit end I'm pretty sure the reed is prone to oscillate on certain frequency (440-480Hz) and this can be shifted a bit with the chanter.
I'm not sure if this helps, but, for a given chanter, it will play in tune in a 20Hz or so range, depending on the reed. Some are wanting to play a lot sharper than others.

For any given reed, at any given time, in any given chanter, there will be one particular frequency that will work best (provide the most in tune notes).

Reeds can be made to pitch at higher or lower frequencies by moving them in or out and taping the sharp notes. This is what we do in the band. If one piper is flat, then we push his reed in. If a piper is sharp, then we back the reed out.