The CaliforniWAH from EDEN is a filter pedal designed for electric basses. It features control knobs that fine tune the pedal's "auto-wah" characteristics to your particular touch, playing style, and level of output. For instance, a low-point control adjusts the frequency at which the CaliforniWAH's filter begins to take effect, while a sensitivity knob controls the volume at which the effect is introduced; thus, the frequency of your notes and the velocity of your fingers trigger the wah.

Two other parameters are somewhat interdependent: A voice switch for changing the overall timbre of the wah, and a resonance knob for fine-tuning the EQ of whichever voicing you choose. Furthermore, an effect level control acts similarly to a mix knob, calibrating how much filtered signal is blended with the original tone. A power supply is also included with the pedal.