on off

My first post on the forum. Sorry if i sound stupid. Ive been thinking about rather than having a volume knob. just a "On/Off" volume switch, how would this be wired, assuming your using a single humbucker pickup (Emg 808x)

Hi guys, I'm new to the forum, I've recently started building a parts caster and have come up against a problem with the midi part of my plan. Using a Graphtech Ghost Piezo pickup and 13 pin jack I'm confused about some of the electronics. To save on controls knobs and switches I was wandering...