Patternaut
Build the pattern. Break the pattern. Take it to the Tracker.
I make music on a Polyend Tracker, and I built Patternaut to do the fiddly parts on my Mac first. It generates and mutates patterns, then gets them onto the hardware, so I spend less time programming steps and more time playing.
When it ships it will be a one-time purchase. No subscription, no account, nothing sent to a server.
What it does
Patternaut works the way the Tracker does. Sixteen tracks, per-step FX, monophonic voices. You generate a rhythm (Euclidean, probability, swing and humanize) or program the grid by keyboard, then shape it with rotates, transforms, and mutation that can stay subtle or go fully off the rails. Everything is reproducible from a seed, so a pattern you like is a pattern you can get back.
When an idea is ready, Patternaut writes it straight to your SD card as real Tracker files (.mtp patterns, .mt projects, .pti instruments), or plays it into the Tracker live over MIDI while it records. Drop in a 16-bit WAV and it becomes an instrument.
It is not a replacement for the Tracker, and it is not trying to be. It gets ideas ready for the machine and then stays out of the way. It runs locally on your Mac, with no account and nothing sent anywhere.
Try the beta
Patternaut is early. It is in a private TestFlight beta for macOS 14 and later, and I am still shaping it. If you use a Tracker+ or Tracker Mini and want to try it, get in touch.