Seamoon FX builds analog effects pedals centered on a modern reissue of the Funk Machine, a 1970s envelope filter that appeared on numerous funk, R&B, and pop recordings before the original company faded from the market. The brand was revived by bassist and producer Neil Jason, whose session and production credits include work with artists like Paul McCartney, John Lennon, and Eddie Van Halen. After several attempts to recreate the original circuit, Jason and his partners released a compact version of the Funk Machine intended to capture the character of the vintage unit in a more durable, pedalboard-friendly enclosure.

Beyond the flagship Funk Machine envelope filter, the Seamoon FX lineup has expanded to include the Octatron, an all-analog octave pedal aimed at both guitar and bass, the Grind Machine overdrive, and the Skye Machine. The pedals are marketed toward guitarists, bassists, and horn players, reflecting the Funk Machine's origins as an instrument-agnostic filter effect.

Seamoon FX has 2 products cataloged on Equipboard, including Filter Effects Pedals and Harmonizer & Octave Effects Pedals. Their gear is featured by 5 artists, with the strongest followings in Rock, Funk / Soul, and Jazz. Notable users include Leland Sklar, Darryl Jones, and Jerry Barnes.