A standard flanger cycles its delay time up and then down again. Through-zero flanging lets the delayed copy pass the dry signal in time, which creates a deep cancellation at the turning point. The Wave control picks an upward cycle, a through-zero cycle at its centre or a downward cycle.

Speed runs from very slow movement to very fast sweeps. Regen adds negative regeneration left of centre and positive regeneration right of centre, with none at the middle. Negative settings sound hollow, while positive settings move towards a phaser-like sweep.

Bypass is true bypass, and the pedal is handmade in Portland, Oregon. The Shepard's End Sub-Zero is a separate model.