RC Setlist

A source-available extension for Ableton Live that turns the Arrangement’s locators into a live show setlist. It reads the project’s named cue points, builds an ordered setlist, and exposes it as two web views served over WebSocket on the local network: /setlist for the operator (next song, current lyrics, tempo, click, transport guard) and /performance for the stage (large-type next lyrics + QR code for phones on the same LAN). Synchronized .lrc lyrics, tempo and click feedback, and a guarded transport (no accidental stop on a busy stage).

Built on the Ableton Extensions SDK. No cloud, no account, no telemetry — the desktop extension talks to the browser views on port 4444 over LAN only, so it can run on a festival router or even a phone hotspot without anything leaving the room. Open the QR on the operator’s screen, scan it from the stage, and the band reads the rest of the show from a phone.