Fuzz-Wah Modulation Section ControlsThe Modulation section provides controls for the Low Frequency Oscillator (LFO) and Envelope Follower (ENV) that can be used to modulate the wah filter’s sweep.The Rate control sets either the LFO frequency, or the response time of the envelope follower, depending on the setting of the Mode control.The Type control lets you select either the LFO or the Envelope follower as the modulation source for the wah filter.The Depth control sets the amount of modulation sent by the LFO or envelope follower.