Detail 01
Envelope filter
The filter tracks your attack. Dig in and the sweep opens further; play soft and it barely moves.

Independent shopping perspective
Compact envelope filter that turns picking dynamics into a filter sweep. For funk, disco and rhythm players who want auto-wah without a treadle.

Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
The filter tracks your attack. Dig in and the sweep opens further; play soft and it barely moves.
Detail 02
Roughly half the footprint of a standard-size filter pedal, so it slots into a full row.
Detail 03
Deeper than it is wide. Measure your board's front-to-back space, not just the gap between pedals.
Detail 04
Puts a dedicated envelope filter in reach without stepping up to a multi-knob Q-Tron.
Detail 05
Voiced for guitar-level output. Feeding it a line-level or synth signal will push the tracking off.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
Same filter idea, different control. A wah sweeps when you rock the treadle. This one sweeps off how hard you pick, so it moves on its own with your playing.
It's built as a guitar pedal, so the filter range and input sensitivity are set for guitar output. Bass will trigger it, but the sweep may sit higher than you want.
Early, usually right after tuner and compressor and before drive. It needs a clean dynamic signal to track properly; compressing hard in front of it flattens the response.
This is the compact version of the same family. You get the core envelope filter in a much smaller enclosure rather than the larger unit's full control set.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.