Phaser
Frequency controls the tonal character of the effect.
Range determines the distance the notches move. High values can lead to noticeable pitch shifts.
Speed controls the speed used to move the notches.
Depth controls how deep the notches are (the deeper the notches, the more intense the effect).
The Stereo button can be used to create a stereo effect by moving the left and right channel notches in opposite directions.