Big Fat Balls - Dynamic Bass Envelope Filter

From the vendor

Make your own dynamic bass envelope filter, very similar to a Bass Balls. Kind of an autowah affair. There's a knob for sensitivity and a toggle switch to kick in some distortion. One of the internal trimmers can be replaced with an external pot if you want more tweakability over the filter instead of set-and-forget. The kit is supplied with vertical-mount pots which have round shafts, so you'll need set-screw fitting knobs. If you want the PCB without parts there's a link for that at the bottom of the page. Partial kit: PCB, all board-mounted components, pots. Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED. Enclosure (pre-drilled) is available as an option with full kits, and will not take a battery. Knobs are not included. Inspired by: Bass Balls Difficulty: Medium PCB size: 50 x 50mm Knobs required: 1, 2 Enclosure: 1590B Direct-connect compatible (4 way) Download the INSTRUCTION PDF