The MXR M82 Bass Envelope Filter is an analog bass effects pedal that creates the classic, funky, vowel-like sound often heard in slap bass, funk, R&B, and acid jazz. It responds dynamically to how hard you play, making the tone open up and sweep through different frequencies as each note is struck.
Unlike a conventional EQ pedal, which lets you manually adjust fixed frequency ranges, the M82 uses an envelope-controlled filter that reacts to your playing. The result is a distinctive “wah,” “quack,” or “bwoow” sound without needing to rock a foot-operated wah pedal.
Sound and character
Classic funk quack: Produces a sharp, rubbery, almost vocal-like tone, especially with slap bass.
Expressive filter sweeps: Harder attacks can trigger more pronounced, brighter filter movement.
Warm analog character: Gives your bass a rounded, organic quality rather than a digital or synthetic sound.
Deep low-end retention: Its clean blend control helps preserve the fundamental bass tone beneath the filtered effect.
Adjustable intensity: Can deliver subtle, bubbly movement or a bold, exaggerated wah-like sound.
