I am an advanced amateur bassoonist playing a Fox 201 and have begun to have an unstable middle G. Sometimes the sound will be solid, but all too often it comes out as an out-of-tune falsetto. I have tried harder reeds which work initially but then the problem recurs. If I play a scale, every other note is fine, but when I hit the G that one note goes unstable and out of tune. My repairman says that there is nothing wrong with the instrument. I can believe that the problem is the reed or the way I am playing the note, but why is it that I did not have this problem for 20 years and now I have it? I am wondering if anyone else has ever had this problem. Thanks for your advice.