Golden Master has released Harmonic Ratio Arpeggiator – a free microtonal arpeggiator for Reaktor:
This is my first system for making melodies and chords in just intonation: a harmonic arpeggiator.
There are two different tables containing numbers for the numerator and denominator, and these tables can be moved through independently, at different speeds. Midi input triggers notes, but only the time and octave of the input notes is taken, and the rest is controlled by the ratio sequencers.
I have implemented this system in both my Nord g2 modular and in Reaktor, so I can make them work together.
You can preview an example of harmonic ratio arpeggiation below.