I don't know if you guys have discovered the wonderful sax 
at D11 if you still have your factory preload programs in place, 
called "Alto Breath". This is a great sounding sax, but unfortunately, 
it does not have a very natural sounding vibrato when you push the 
joystick away from you, and none at all when you pull it toward you.

Here's a little tip I discovered:

Go to Program Mode, and select D11 Alto Breath.
Hit the "Menu" button.
Select the "VDF" box.
Select the "control" tab.
Where is says "Joystick -y VDF MG intensity", change the value 
from "0" to "3".
Play a note of the sax and hold it.
Pull TOWARD YOU the joystick.
Listen to the natural sounding vibrato you just created!

Glen