In the words of EarthQuaker Devices:

The Spatial Delivery is an oddball, a voltage controlled envelope filter that allows you to step outside the universe of funk while reinforcing your secret
love affair with auto-wah. It has 3 modes- Up Sweep, Down Sweep and
Sample and Hold. With Range, Resonance and Filter controls you can get
super emphasized filter sweeps in the Up and Down modes. The Range, in
combination with pick attack, controls the sensitivity and reaction time
of the envelope and thus the width of the frequency sweep.