There are several forms of this pedal. The earlier versions had a bad, noisy switch. later, that was changed to a switch that won't make noise on stage when you switch it on and off. And then, later still a momentary switch was enabled.
Ahh... I only have a source audio Manta, which I use as a phaser. It is super versatile, but no octave function like the spectrum. And no computer editor interface.