Originally Posted by cptexas
The pumping is a result of our flexing technology
Make sure you have the mod wheel set right. Woodwinds particularly use the mod wheel as a continuous controller to impart dynamic and expression. So make sure the mod wheel is not all the way up and ride the mod wheel as you play sustains. Next, the sustains use the sustain pedal for legatop mode. If you want a smooth transition with no ramping attacks, try depressing the sustain pedal.
Hope this helps,