Dynamic Tonality has released XronoMorph, a free Windows and Mac app for
creating multilayered rhythmic and melodic loops.
Each rhythmic layer is visualized as a polygon inscribed in a circle, and each
polygon can be constructed according to two different mathematical principles:
perfect balance and well-formedness (aka MOS). These principles generalize
polyrhythms, additive, and Euclidean rhythms. Furthermore, rhythms can be
smoothly morphed between, and irrational rhythms with no regular pulse can
also be easily constructed.