CueSync sends OSC to QLab to start, stop, pause, and panic cues in real time — beat- and phrase-accurate playback without a stage manager riding every GO.
QLab's OSC dictionary is built in. CueSync targets /cue/.../start, workspace transport, and panic without plugins.
Start numbered cues, stop or pause playback, or fire a panic on energy changes and phrase transitions.
Cues land on the downbeat or at phrase boundaries — CueSync locks to musical structure, not a stopwatch.
MIDI Show Control (GO/STOP/RESUME/GOTO_CUE) for rigs that standardize on MSC instead of OSC.
Save QLab workspace routing per production and recall it instantly.
QLab connection state, health and circuit-breaker status are always visible, and every failed send raises an operator notification — no silent failures mid-show.
Engineering facts
The load-bearing claims behind CueSync's QLab integration. Numbers, named subsystems, test references — the things you can verify before the show.
Cue control is `/cue/<number>/go`, `/cue/<number>/start` and `/cue/<number>/stop`; transport is the bare `/go`, `/stop`, `/pause`, `/resume`. QLab has no `/cue_lists/<list>/cues/<n>/go` address — that one gets invented often and silently does nothing. Default port 53000. Source: QLabProtocol.kt.
CueSync evaluates beat events from Pioneer PRO DJ LINK on a sub-5 millisecond budget on the cue-evaluation path, and reports the budget-violation rate on screen. End-to-end latency depends on the operator's protocol chain and venue network; the CueSync portion is engineered to a strict sub-5-millisecond budget and continuously regression-tested. The OSC send budget is under 2 milliseconds.
On the Theatre and Production editions CueSync emits MIDI Show Control (GO, STOP, RESUME, GOTO_CUE) alongside OSC, so it slots into the standard theatre cue-light and playback workflows that QLab already anchors.
Different question? Ask us directly.
Other tools that connect here: QLab is often the master; triggering it externally requires custom OSC or MIDI mappings. CueSync fires QLab cues from beat detection and timecode, adding music intelligence to your existing show files.
See also
Download CueSync free and run the built-in demo show — press Space and its cues fire against simulated outputs, no hardware required. Subscribe when you're ready to drive a real rig.
QLab® is a trademark of Figure 53, LLC. CueSync is an independent product and is not affiliated with or endorsed by Figure 53.