Funky automatic filters are one of my favorite alliterations in the guitar effects world. As bizarre as this may sound, these kind of effects seem to bring a level of consciousness to the guitar notes played through them - it's like if that riff was talking to me! The effect in question is also known as an auto-wah, since the filter is triggered by the dynamics of your playing rather than moving a foot pedal back and forth. It's this dynamic triggering of the filter that gives the envelope filter its own unique sound. Notable guitarists using this effect include Frank Zappa, Jerry Garcia, and Pete Townshend. It also sounds beautiful on bass and has been used by Flea and Bootsy Collins on numerous occasions.... Click on the title for more