The Old Blood Noise Procession Reverb V2 is a powerful modulated reverb from a galaxy far, far away. Procession excels in creating amazing, atmospherically, weirdo, sci-fi reverbs. Use the 3-way toggle switch to access Procession’s main three modulations; flange, filter, and trem. Flange is capable of slow swirls and ray gun speeds. Filter adds subtle shifts and squawks. Trem can add luscious waves of tremolo or fast choppy depth. Each of modulation controls can be adjusted using the speed and depth knobs. The Hold switch is a momentary footswitch that when pressed, will lock in whatever note is being played through the reverb effect. This will sustain as long as the hold switch is pressed. If the mix control is set less than 100% wet, you can continue to play over the sustaining reverb signal.