The T-Rex Gull Triple Voice Wah Pedal is switched on and operated using the Pedal controller. To turn the unit on or off, press the Pedal all the way down to activate the ON/OFF button hidden beneath the Pedal. Once you've switched your Gull, you'll want to select a mode via the MODE switch. The 3 modes are -WAH 1: A light wah effect that's perfect for clean guitar sounds and rhythm parts. WAH 2: A class full-out wah you'll recognize from history's great wah-wah solos. YOY: An unusual effect that uses dual-filter technology to add a subtle, breathy high-frequency modulation to the classic wah.
Use the Slope knob to adjust the character of the frequency band you sweep as you operate the Pedal. The higher you set the Slope knob, the more dramatic the wah. The Boost knob is useful tool for making sure you're wah-wah sound is loud enough in the mix.
The higher you set it, the louder you'll be when you kick your Gull into action. Gull operates like a traditional wah-wah when the Hotspot button is in. When the button is out, you get more pedal to work with before the effect reaches its highpoint.