The Duck Box Envelope Filter is a pedal that is inspired by the Guyatone WR3 Wah Rocker. It features three main controls: Attack, Decay, and Blend. The Attack control adjusts the speed at which the filter effect is applied to the signal. The Decay control determines how quickly the filter effect fades out after the initial attack. The Blend control allows you to mix the filtered signal with the dry signal, giving you control over the intensity of the effect. Additionally, there is a toggle switch that allows you to choose between different filter modes.

Summary created by AI from the original source.