The problem is, there is no standard 'sax' sound. Who are you trying to emulate? What type of sax sound or sax playing do you find most pleasing? Clarence Clemons (E-Street Band)? Lester Young? Stan Getz? John Coltrane? Kenny G? Charlie Parker?.....you get the idea, their sounds are so different you'd wonder if they were playing the same instrument.
Gary, I agree with Jimmy McKinney about the sax in the sax DEMO on the Tyros2, however, I would love to know how they did it, as I've never been able to even come close to the sound of the sax in that demo (I have a Tyros2). Did they use a breath controller? Maybe a digital sax midi'd to a Tyros2? I'm not alone either, as I've never heard anyone else get the kind of result demonstrated in that classic demo either. Just sayin'.
"Faith means not wanting to know what is true." [Nietzsche]