This unusual random modulated delay. Can produce light flange FX or chaotic weird FX.
Speed parameter gives a "scratch" effect when set below 100ms, above it provides all kind of flange (0 to 1000Ms).
With a correct amount for depth, feedback starts to auto-resonate and give some modulated "notes" above 70% (0 to 100Ms).
Amount of feedback.
Amount of Stereo Enhancer effect.