NOT KNOWN DETAILS ABOUT PLAY C SHARP DORIAN ON ALTO SAXOPHONE

Minimal C# is ok and I'm able to play all the other notes to the horn in tune without a difficulty. I can carry middle C# nearly tune While using the octave critical and G essential and C# earlier mentioned the workers by using the octave essential along with the E and D keys. I realize I in no way experienced this problem once the sax was new. Sim