- Mouthpiece in the wrong position, move it further in if you are flat, further out if you are sharp.
- Make sure that you are not inadvertantly touching other keys as you move along the scale.
- Manually lift the pads to :welldonemake sure that none are sticking:thankyou:.
- Sax could be damaged - get a repairer to give it the once-over.
You say that you are a newbie, at the risk of sounding patronising if you are brand new then make sure that you are using the correct fingering (left forefinger only and make sure you are not touching any other keys by mistake).