I have a really sharp A2 on my King Tempo (Couf II), anyone else have this problem as well? Notes above it are sharp as well just not as much. My instructor has a similar problem on his Superba I. Octave pip problem? Key height problem?
The G pad cup that's controlled by the left hand ring finger may be too high. This key controls a lever that opens and closes the lower octave key. Just adding a bit of cork on that lever will lower the G cup and the pitch of the A and effect slightly the notes above A.
I think you would need trial and error, though my gut feeling is opening won't help.
If the problem goes away when you play those upper octave notes without the octave key, then this sort of points to that being the issue, so I would think opening the pip would make it worse, however I'm no expert.
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