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.
Other popular effects pedals include a wah-wah pedal (designed for sweeping a guitarâs tone control), fuzz, delay, flanger, phaser, reverb, chorus, compression, looping and boost. Many guitarists also use an EQ pedal to further shape and customize their sound.