Pearl/Vorg Warp Sound Filter

Per request. This one is buffered effect, so you'll need just 2PDT stomper. Original unit has two NEC C251Cs in it and if you really want, you can score those for ~6 USD a piece from evilbay. However, the build reports state that any dual op-amp will work just as well. It should work just fine with JRC4558, TL072, NE5532 and so on.
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Note thte double links. Those are the blue dots. You know the deal...