Reference architecture · macOS · v0.1.0 · in development
Capture continuously. Compose retroactively.
Sirius Looper is a performance looper for serious musicians. Every input is captured to an always-running tape, so the moment is already recorded by the time the gesture to keep it arrives. Mark in. Mark out. Move the in-point backward to catch the pickup note you didn't mark. Compose phrases from material that has already happened, instead of fighting to start a take on the downbeat.
Three things existing loopers can't do.
Every existing looper quantizes time to a single grid, locks you into one meter per loop, and demands you hit Record at the exact moment a phrase begins. Sirius does none of that.
Retroactive capture
The tape was always running. Mark Out closes a region — and you can move the in-point backward to grab the pickup note you didn't mark.
Polymetric phrases
A 4/4 drum loop and a 7/8 ostinato live in one phrase without approximation. Each in its own meter; they meet at phrase boundaries.
Micro-timing preserved
Swing, pocket, the deliberate behind-the-beat feel — captured at substrate precision. Nothing is quantized away. Nothing is smoothed.
Built on first principles.
Time, inside the engine, is concept — not number. The system reasons about positions and relationships symbolically and renders to numerical samples only at the membrane where audio meets the interface. Everything else follows from that decision.
Read the architecture →