A wah with two modes: Auto, an envelope filter that sweeps with your picking dynamics, and Fixed, a parked “cocked-wah” midrange honk — so it works as a saved preset with no expression pedal needed. Resonance and range controls shape the vowel. Light on CPU; runs on every target including 32-bit Pi.

Works standalone or as part of the Hex Chain suite / Hex Forge. Free and open source (GPL-3).

Credit: Ryan Powell