I've been doing some reading (by which I mean window shopping) of different effects, and something about the Boss CEB Chorus jumped out at me. Namely, it has a low pass filter, which allows one to apply chorus only to the higher frequencies, leaving the lows dry and clean, to prevent muddying. So then I had an idea: Why not put one of those filters in an overdrive or distortion pedal, distorting the top and leaving the lows clean? Are there pedals that do this? Am I starting my thinking process on the wrong premises? If so, how?