I have a C flute, which I recently dug out and am relearning.
I've noticed that the first trill key for C-D doesn't work as well for high C-D. There is a change in pitch and quality, much more noticeable than the change for the normal octave C-D trill.
Is there an alternate, easier (than alternating the normal C-D fingerings) way to do a high C-D trill?