Change tone in an instant, make your guitar sound as if it's crying, and funk up those rhythm sounds - welcome to the wonderful world of wah-wah. What does a wah pedal do? In basic terms, it changes ...

On top of any other guitar effect, Metallica guitarist Kirk Hammett is known for his love of the wah-wah pedal. The rocker's frequent use of wah eventually led to the design of his own signature wah ...