Here's what Dwarfcraft say about the Body Mod pedal
Body Mod is a feature rich but easy to control modulation powerhouse. There are three modes onboard: Chorus, Flange, and Octave. There are the standard Rate and Depth controls, but they also added a Flux control. As the Flux is turned up in the Chorus mode, an upper octave effect can be heard and at full rotation the pitches spiral up and out of range in a bit of audio alchemy.
In Flange mode, the Rate and Depth function just like the Chorus but the Flux knob is a simple resonance dial, allowing players to dial in just the right amount of metallic zing for the occasion. Lastly, the Octave mode provides parallel sub octave and upper octave signals that can both be filtered with the Flux knob.