Toggling CFX On/Off with Midi or keyboard

I'd love to toggle all 4 CFX with a button on my keyboard/controller.

Also, being able to configure individual FX's to be "push-to-enable", just like the release FX is, would be great.

Backstory: I really wanna have a button on my controller, which i can push and hold to enable a CFX (like Noise) and release to instantly disable it again. This would allow me to add Noise, just like I would by using a Sample in Gate Mode, BUT I would be able to lower/raise the Noise with the Filter knobs on my controller.

(I'm using a DDJ-400 with the latest version of rekordbox)

Thanks!