Global tuning change for all synths.

Hi, Is it possible to de-tune all synths globally in X1? I've got an alto sax. It's and E flat instrument. I'm a terrible saxist and I want to see if I can set it up so my synths are a half step down so it will be easier to play along with. It would be cool if possible. Or at least Z3ta+ 2.1. Thank You!