so I already have a Source audio manta, OFD and expression pedal and I have messed around a little bit trying to get a good distorted wha sound but im just not getting what I want ie the "burton"sound and im starting to think I need to stop trying to make my envelope filter into a wha and just get the pedal thats made to do what I want even though I know the manta is capable of a huge aray of sounds but can it do this one?