Departing from a base pitch, Metapath will traverse a slope of note pitches over a specified distance in either current note grid or actual note intervals before changing directions and sloping in the opposite direction over the same distance. Below the distance, base, and slope dials are percentage controls for randomisation of these parameters which are calculated at each pivot point to produce less repetitive pathways. Another slider below slope helps it tend generally more upward or downward towards its final destination.

Beneath this we have the chance of note lengths being tied, a base velocity for all generated notes, and a pattern density to make it less busy. Finally we have the pitch range constraints to narrow the path output. To understand the calculations taken, you might want to set the distance, base and slope randomisation sliders to 0% and see how it behaves.