3Leaf Audio Chromatron Analog State Variable Filter Guitar Effects Pedal w/Poli : Amazon.ca: Musical Instruments, Stage & Studio
3Leaf Audio Chromatron State Variable Filter Guitar Effect Pedal — Truetone Music
Filter electronics. | TalkBass.com
FilterFX – 12dB/oct LP/BP/HP LFO filter with 8 waveshapes – Electric Druid
State Variable Filters
Experimentalists Anonymous DIY Archives
Guitar FX Layouts: Anderton Super Tone Control
operational amplifier - Frequency response of state variable filters - Electrical Engineering Stack Exchange
The digital state variable filter | EarLevel Engineering
State Variable Filters
An Introduction to Envelope Filters | Hochstrasser Electronics
STATE VARIABLE FILTER - Share Project - PCBWay
3Leaf Audio Chromatron – Motor City Guitar
C-Switch vs State-Variable Filter (SVF)
C-Switch vs State-Variable Filter (SVF)
Long Life - Fairfield Circuitry
State Variable Filters
Aktive Elektronik: State Variable Filter
State Variable Filters
3Leaf Audio Chromatron State Variable Filter Guitar Effect Pedal — Truetone Music
State variable filter frequency adjust - MOD WIGGLER
FilterFX – 12dB/oct LP/BP/HP LFO filter with 8 waveshapes – Electric Druid
Filter/booster for electric guitar – vigstrom
Mosaic State Variable Filter - Perfect Circuit
My take on an envelope controlled State Variable Filter - SabroTone
