Get a cigarette paper and check the seal of the pads in the top stack:
http://www.shwoodwind.co.uk/HandyHints/LeakyPads.htm
It could be that you have one or more pads leaking - probably at the rear of the tone holes.
Other than that it might be an octave key issue.
Regards,
http://www.shwoodwind.co.uk/HandyHints/LeakyPads.htm
It could be that you have one or more pads leaking - probably at the rear of the tone holes.
Other than that it might be an octave key issue.
Regards,