Dr. Zoppa releases AMI-Polychaos - generative MIDI plugin that turns one held note into four voices of counterpoint

The useful part

Zoppa has released AMI-Polychaos, a generative MIDI plugin for macOS, available as an Audio Unit MIDI effect (Logic Pro) and as a VST3 instrument (Ableton Live and other VST3 hosts). It is not four generators running side by side: one chaotic trajectory is read by four heads, each lagging behind the last, so the four voices are the same orbit seen at four moments. That is what keeps the result related as counterpoint rather than four independent random lines.

How it works

• It comes out of doctoral research in algorithmic composition at UNAM (the AMI system, 2022) and is built with Max/RNBO and JUCE.
• STAGGER rotates each voice's euclidean rhythm, separating the voices in time.
• HARMONY chooses between chromatic transposition of the held chord (CHORD) and a single shared scale (TONAL).
• Six chaotic maps, each with its own character, plus a velocity cycle and a euclidean rhythm per voice.

Details worth keeping

AMI-Polychaos turns a held note into four voices of counterpoint. The plugin generates MIDI, not audio, and is routed into any instrument. A fully functional free 30-day trial is available.