Using a controler as on/off button

Hi, I want to control my B4 VST with my Oxygen61. Ok the slider slider s ar sorted to to the drawbars. But i Want to use controler knobs as On/Off switch for Vibrato / Chorus / Percussion.How does ist work?

How exactly did you imagine using a knob (which, to me at least, is something you turn) to simulate the buttons? Do you want to have one knob for each button, and turned down it is off, and turned up it is on, or what do you want to achieve? I’m pretty sure there are easy solutions in Cantabile for what you want to do, though, I just don’t clearly understand how you want to do it.