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.
How does a gas pedal work? What happens when I push on the accelerator pedal? This video explains the mechanics of a gas pedal, which utilizes a throttle cable to pull on the throttle linkage, opening the butterfly valve within the throttle body, allowing in more air.