I have set to momentary and in the signal chain right before my guitar feeds the fractal. Works well there for me. Although make sure you don't have it set to "dry kill" in this setup. I had that switch flipped at a gig accidentally and it took me forever to figure out that was the problem as there was no sound coming into the Axe.I usually have the Freqout pedal set to Momentary so I can hold down when I want feedback on a particular held note. It makes me wonder if I can throw it in a rack and set up a latching switch on my FC-6 to accomplish this. Is anyone doing anything similar?