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.
How to Dampen the Vibraphone Bars with the Vibraphone Pedal. The most obvious way to dampen the vibraphone bars is with the pedal that moves a felt covered dampening bar away from the bars. When the pedal is depressed the felt dampener is not touching the bars and so the notes will ring.