The BOSS AW-3 Dynamic Wah pedal gives guitarists a wide range of classic auto-wah and dynamic wah effects. Plus a new Humanizer effect which can simulate human vowel sounds. A Bass input provides a variety of funky wah sounds for bass guitar. The AW-3 Dynamic Wah is the first compact wah pedal to incorporate human voice-type sounds through a Humanizer Mode. Of course, you can also choose from standard up-and-down wah effects, plus a Tempo Mode and resonant synth-like Sharp Mode. Choose from both fixed and auto wah settings using the Manual control or pedal for tempo input. By connecting an optional expression pedal, the AW-3 can also be used for Pedal Wah effects.