When i trill from C to D using the first trill key, it sounds out of tune. Any advice?

The trill keys cover tone holes which are in compromise locations for a couple of trills. Because of these compromises they do tend to be out of tune &/or dull-sounding. If you make one trill sharper you make a different trill flatter. T

That is why they are used only for trills where the speed of the notes disguises their imperfection.

Some flute makers manage far better design for the tuning of these notes than others.

The tuning can be adjusted to a different compromise by altering how far the pads open.

if it is the second octave then that is the correct fingering, but if it`s the third octave then the C to D trill fingering is the second trill fingering.

Thanks, Scott. I should have mentioned that too.

Go to http://www.wfg.woodwind.org/flute/ and scroll down to Trill Fingerings and it will give come alternate trill fingerings

hey, but it doesn`t give an altenate for the one you asked sad.

1. Trill faster and no one will notice.
2. "The tuning can be adjusted to a different compromise by altering how far the pads open." That`s what Meme said. I agree. You can make a huge difference with how much you allow the key to open. The more open, the sharper it goes.