Getting to grips with guitar effects can be a complicated business and there are so many different types that it can be difficult to know where to start. This Guitar FX basics series of video lessons is a brief introduction to the most common effects.
This video lesson focuses on autowah. Autowah works on the same principles as ordinary wah-wah (click for a video lesson), but the filter position is determined by how loudly you play rather than the position of the treadle pedal.
Listen to the video below to hear how this sounds.