StagePlayer is a multitrack Audio Unit (AUv3) instrument built specifically for live performance inside Apple MainStage.

Most backing-track tools are built for the studio. StagePlayer was built for the stage — 16 independent audio tracks and 16 independent MIDI tracks in a single plugin instance, with a transport that runs entirely on its own terms, unaffected by anything else happening in your session.

Beyond playback, StagePlayer drives your entire show's automation: Program Changes, CC automation, and precise MIDI events routed independently, per track, to MainStage's own controls, your lighting rig, your video software, or outboard hardware — all perfectly in time with the music, every single time.

Marker-based looping for rehearsal, a full tempo map, drag-and-drop editing, and project files that travel cleanly between machines round it out — a complete toolset for running a show, in one plugin.

Requires: MainStage 3.6 or later, Apple Silicon Mac, macOS 26 (Tahoe)

Feature list

• 16 independent audio tracks, 16 independent MIDI tracks

• Fully internal transport, decoupled from host behavior

• Per-track MIDI routing: MainStage automation, IAC, or hardware

• Sample-accurate MIDI event editing (Notes, CC, Program Change)

• Marker-based looping, read automatically or added manually

• Full tempo map with multiple tempo changes per project

• Drag-and-drop region editing: cut, copy, paste, trim, move

• Project Consolidate for clean portability between machines

• Full keyboard shortcut set for fast, mouse-free operation

• Built for Apple Silicon, macOS 26+ater.