Diagram of normal sinus rhythm as seen on ECG. In atrial fibrillation the P waves, which represent depolarization of the top of the heart, are absent.
The wah-wah pedal is based on a simple concept but its effect is far more dramatic. Using a powerful filter to sweep through a broad frequency spectrum, the wah pedal boosts and exaggerates specific tones. Creating sounds that range from thick, flubbery bass to scratchy, stinging treble.
Hopefully, this explanation will help clear up the mystery of that third PEDAL. That third pedal is called an Inching Brake. Its function is twofold. It initially acts as a brake and secondly disengages the transmission, allowing the engine speed to increase or decrease without affecting the drive of the forklift.