| The idea is that you can put your fuzz (or whatever you like) before the filter, but run a separate clean signal into the 'envelope in' socket. That way the filter gets all your playing dynamics from the clean signal to get a nice envelope, but it actually filters your dirty signal.
If you use a fuzz that has a separate clean out socket (Chunk's Brown Dog, EHX Bass Big Muff, MXR Blowtorch, probably lots of others) then you don't need to do any signal splitting. |