Help with FX mappings

Help with FX mappings

Okay so I just switched to Traktor pro 2 and i would like to be able to use the FX on my Hercules mk4. I have managed to map the FX to the nit but I would like it to were I activate and hold the FX button, I can then use the Tempo knob to control the FX. I’m sorry if this doesn’t make sense, but please help

Not sure to understand what you want but if I’m right, then you need to create a modifier.

make the FX activate the modifier an map the tempo knob to the effect dry/wet when that modifier is active.

Thanks guys