The Flanger effect pedal works by taking the audio signal and mixing it with a delayed, pitch modulated copy of itself. The Flanger is similar to the Chorus effect pedal and can be used to give sounds a sweeping effect.
delay - Allows control of the Flanger’s short delay.
feedback - Allows control over how much of the processed signal is feed back into the effect.
speed(LFO) - Allows adjustment of the speed of the phasing effect.
depth(LFO) - Increases the amplitude of the LFO.