Subdecay PROTEUS: Envelope and Random Sample/Hold Step Filter - YouTube
Guitar Pedal X - GPX Blog - Old Blood Noise Endeavors's ingenious Float Dual Moving Parallel Stereo Filter takes the Filter Pedal Format to new heights
Amplitube X-Vibe Digital Modulation Pedal | eBay
Guitar Pedal X - GPX Blog - Preferred Filter Pedal Selection - at the key practical enclosure sizes
Bob Moog MuRF
Pedal Genie | SubDecay Prometheus DLX | All Your Pedal Wishes, Granted
GFI System Rossie Filter Pedal – Chicago Music Exchange
Zcat Step Filter | Reverb
Rossie Filter FX Pedal | GFI System - Pedal Jungle
Amazon.com: EarthQuaker Devices Spatial Delivery Envelope Filter Guitar Effects Pedal with Sample & Hold : Musical Instruments
Subdecay Prometheus DLX Resonant Filter | guitar pedals for any genre
TWA's new Side Step is a tap tempo expression pedal/LFO
SOLD - GFI System Rossie envelope filter/LFO/step filter | TalkBass.com