CueSync for Unreal Engine

The official plugin that turns any Unreal Engine 5 project into a live CueSync surface. Drag one actor into your level and your world pulses with the music; pair the control channel and Unreal follows your show like a console — cues, scrubbing, and timecode included.

The Reactive Bus — your world breathes with the music

CueSync streams a continuous, normalized bus into Unreal over OSC: beat phase, bar phase, musical energy, key-derived hue, tempo, energy trend, and phrase. The plugin writes it all into a bundled Material Parameter Collection — read it from any material or Niagara system, no C++ required.

A predictive phase-locked clock smooths the beat between network pulses — your pulse animations render at frame rate, not at packet rate.
Energy and hue glide with critical damping, so a key change moves the palette instead of popping it.
Signature accent events — BurstFX, TriggerDrop, CutToCamera, PlayCameraMove, SetScreenMedia — arrive as Blueprint events you bind your own art to.
Drop-on driver components for lights, Niagara, materials, post-process, camera shake, and transforms get you reacting in minutes.

Authoritative Show Output — Unreal as a first-class CueSync output

Beyond the reactive bus, the desktop can mirror its authoritative cue state to Unreal over a reliable WebSocket control channel. Unreal follows the show the way a console does: what CueSync says is active is exactly what is active in-engine.

State snapshots apply as a replace — any channel no longer owned by a cue is released, so nothing is ever left stuck on.
Jump-safe scrubbing: rewind the show and Unreal reverts cleanly with the timeline.
The plugin reports an active-set hash back to the desktop, which verifies it and self-heals any drift automatically.
Cue crossfades glide the values your Blueprints see, while the authoritative state stays exact for verification.

Timecode Genlock — Level Sequences chase the show

While a show plays, the plugin installs an Unreal timecode provider fed by CueSync's show clock. Level Sequences chase the show position — re-seeking on a jump, scrubbing otherwise — with a short freewheel across momentary gaps.

Drop-frame and NTSC rates are handled (29.97, 23.976, 59.94, and integer rates).
A Sequence Director component wires the chase to your chosen Level Sequence — one property, no Blueprint graph needed.
When the feed stops, the provider freewheels briefly and then reports unsynchronized honestly — never a silent drift.

Monitor and Web Remote — see it, and drive it by hand

A dockable CueSync Monitor panel in the editor shows connection state, live bus meters, and manual controls, so you can build reactions before CueSync is even running. A plugin-served web remote gives a tablet the same bus with tap-tempo when there's no stream.

The Monitor's status is honest: live stream, standalone clock, and waiting states are distinct — no fake green lights.
Manual sliders and accent buttons drive the same bus the OSC stream drives — one source of truth.
The web remote renders labeled controls from a registry your director Blueprints populate — cameras and screens by name, not by number.

Pairing and Security — LAN-local by design

The authoritative channel is opt-in and paired once: the Monitor shows a stable pairing token (with an optional PIN) that you paste into the CueSync output config. No token, no control — the plugin stays a pure reactive receiver.

The pairing token persists across editor restarts, so you pair once per project.
A wrong token or PIN surfaces a clear error in CueSync — never a silent hang.
Repeated failed pairing attempts on a connection are cut off.
Everything is LAN-local; the documentation is explicit that the plugin's ports must never be exposed on a routable interface.

Built for both shows

DJ sets and theatre shows reach Unreal through the paths that fit them: beat-driven and analysis-driven streaming for a DJ set, and timecode-driven cue state with genlock for a scripted show.

DJ edition: beats, energy, and phrase from the live analysis pipeline stream to the bus in real time; fired cues activate over the control channel.
Theatre edition: the show timeline drives position-based cue snapshots and the timecode feed — scrub the show, and Unreal scrubs with it.
One plugin, one contract: the same channels and events work in both, so your Unreal art doesn't care which kind of show is running.

Ready to put your show inside Unreal? Get CueSync and add an Unreal Engine 5 output. Questions about the plugin or early access? Talk to us.