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.
Though using a Wah pedal in rehearsal or on a gig can be fun, dealing with a malfunctioning or broken pedal can be an unnecessary problem. Learning how to diagnose and fix simple problems with your Wah pedal can save you both time and money, and teach you about the mechanics of your pedal at the same time.