Hey Guys! Is it true that the mouthpiece can affect the tuning? I have a Yanigasawa 6, metal, which I have got used to playing and love the sound. But...it has not improved the sharpness after the break (Mid D is especially bad) -so when the bottom octave is in tune the upper ones are way out. It is a problem that I don't have with my Soprano (ironically.)By the way, I have an Earlham Chicargo Alto. Is it possible that another mouthpiece may help - or anythin else?? I am more experienced at playing Sop, so may have a tighter embrochure - but if this was entirely the case then surely the whole Sax would be sharp...Please any experience out there to help....Thanks!