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.
Since these types of pedals are considered staple tools for a guitarist, you'll find some or all of them combined into one unit in a multi-effects pedal. These all-in-one floor effects sometimes also include added features like built-in preamps, and many of them have rocker pedals to support volume, EQ and control effects. While considering your options in floor guitar effects, another thing to keep in mind is how you will store and transport them.