@christoph-hart Thanks to david a long time ago I got something like this working for something else, I reused but it didn't work in this case.
// ******************** Knobs(Sliders) Mappings ********************//
const var knobs = [];
// 1st Parameter Mapping (fx_enabled (bypassed)//
knobs[0] = Content.getComponent("fx1Knob1");
knobs[1] = Content.getComponent("fx1Knob2");
knobs[0].setControlCallback(knobCB);
knobs[1].setControlCallback(knobCB);
inline function knobCB(control, value)
{
for (i = 0; i < 2; i++)
{
if (control == knobs[i]) continue; //Skip the knob that triggered the callback
knobs[i].setValue(value);
}
//Dynamics.setAttribute(setBypassed, value);
Dynamics.setBypassed;
}