Audio Kitchen releases Moof Filter, a Mutator-style envelope filter
September 2, 2026 · 2 sources
Audio Kitchen released the Moof Filter, a filter pedal based on the Mutronics Mutator, on September 2, 2026. The maker lists it as a preorder with shipping estimated for the end of September 20261.
The pedal is an analog guitar and bass low-pass filter. Audio Kitchen says it uses "an upgraded version of the SSM 2045 design" designed by Dave Rossum, the designer of the original filter, and describes the sound as close to the original1. Guitar Pedal X reports that the Mutator used four filters where the Moof has one, and that the Moof has been optimized for guitars and stringed instruments2.
Controls are grouped by function:
| Section | Controls |
|---|---|
| Filter | Cutoff, Res |
| LFO | Depth, Speed |
| Envelope Follower | Sweep, A/R (attack/release switch) |
| Output | Volume |
The envelope follower converts the input signal into a control voltage so the cutoff tracks playing amplitude, with Fast, Medium and Slow attack and release settings1. The internal LFO modulates the cutoff continuously; connecting an external LFO to the rear-panel input defeats it1. An expression pedal input controls cutoff1. The volume control runs from unity gain to about 3.6x gain1. The pedal draws 9VDC at 300mA on a 2.1mm center-negative supply, has a nominal output impedance below 1KOhm, and sits in a die-cast aluminum enclosure measuring about 120mm x 95mm x 55mm and weighing 450g1.
Guitar Pedal X's Stefan Karlsson wrote that he was impressed with the device at Witney and that it "sounds fantastic," while calling it "a little on the pricey side"2.