Vortex Sound Research

Hi guys i need help.

I play in rock band and we are using synth as a preset machine mostly. But now I want to create sound that will be distorted supersaw. I stacked some saws haha and added distortion. Pitch bemd wheel is controling pitch + - octave. Problem is that i dont know how to program mode wheel to silence sound whem I rotate it up. I tried modulate filter frequency but that is not working. What shoud mode wheel modulate and how to silence sound when rotated all the way up.? Sory for bad eng and probably noob question.