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.
Perhaps the most common effects pedal is a distortion or overdrive pedal, which either provides a distorting effect or overdrives the guitarâs signal into the amplifierâa tone that is highly popular in many genres of music.