The Bixonic Auto Wah is a combo envelope filter and auto wah. The pedal has four knobs that control the effect: Sensitivity, Attack, Tone, and Mix. Sensitivity adjusts the amount of effect based on the dynamics of the guitar player. Attack controls the speed of the wah effect. Tone changes the brightness or darkness of the sound. Mix balances the dry and wet signals. The knobs can also be pushed in to adjust other parameters, such as the frequency range and the resonance of the filter.
The Auto Wah also has a feature that allows the user to save three presets, which can be selected on the pedal or through the use of an external selector. The presets can store different settings of the knobs and the parameters, and can be recalled easily for different songs or styles.