Sopranos are more sensitive to small differences. What is Ok for alto or tenor, becomes a problem on sop. So a decent (not ridiculously pricy) mouthpiece comes into the frame. I can't quite fathom, Chico222, whether you are still playing the Jupiter or the Yamaha. If the former and the Yamaha is on its way, I would expect you to find a big difference. Yamaha stock mouthpieces do not enjoy a terrific reputation, though, and you may want to try another. That's where the problems start ... and I don't want to get into that one! I know what Dave will say, and my choices are shown in my signature. After that ....