Watch the Lead Wah online guitar lesson by Jeff McErlain from Guitar Effects Survival Guide
Where would rock and roll be with out the wah pedal? One of the earliest fx pedals and certainly most enduring, the wah can add a cool rhythmic or vocal quality to your playing. Frankly it can also help cover up mistakes and can be over used at times. So please don't use it as a crutch! That said, really experiment with what the pedal can do to add a deeper element to your playing. I especially love the vocal quality it can add that I mentioned, we can for vowel sounds with it. Steve Vai is a master of this use of the pedal. Of course Hendrix and Clapton are some of the earliest proponents of the wah.