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.
Distortion: Distortion pedals are pretty much the same as overdrive pedals, just with more amplifier gain to produce more clipping. More often, the clipping diodes are placed directly in the signal path (hard clipping).