The Neutron filter from Geofex has a variety of options, though it is more stompbox level. http://www.geofex.com/PCB_layouts/Layouts/neutronpub.pdf -Colin On Jan 25, 2006, at 4:58 PM, dustin sedlacek wrote: > Anyone know where to find some schems for a vactrol filter? I have > found very little information on this on the net. > > -- > Dustin