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Envelope Follower

The Envelope Follower creates auto-wah type effects.  It works by following the envelope of the audio signal to control a filter or other type of effect.

Effect Variation - The type of envelope follower.  Low pass filter (-24, -18, -12, -6 dB per octave ladder filter), high pass filter, band pass filter, notch filter, comb filter and pan.

Invert Envelope - Inverts the envelope.

Sensitivity - Controls how the envelope follows the signal.  The LED indicates when it's fully opened.

Attack - The time it takes for the envelope follower to start working.

Decay - The time it takes for the envelope follower to stop working.

Depth - The amount the filter or effect is modulated by the envelope.

Filter Frequency - The filter's cutoff frequency.

Filter Resonance - The amount of filter resonance (feedback).  For the notch filter, it controls the bandwidth.

Filter Overload - The amount the filter is overdriven.