Flanger

The Delay knob sets the average delay time. The Speed and Depth knobs control the modulation.

The higher the Feedback setting, the more pronounced the effect.

If the Stereo button is engaged, the delay times of both stereo channels will be modulated with out-of-phase signals. With low delay settings, this creates a sound similar to a rotating speaker. The Reverse button makes the stereo effect "spin" in the opposite direction.