Technical Specifications
The numbers behind CueSync — for production managers, network techs, and anyone speccing a show around it.
Platforms
| macOS | Signed and notarized DMG; native Apple Silicon and Intel builds. |
| Windows | MSI installer (build in progress — check cuesync.live/download for current availability). |
| Runtime | Self-contained — CueSync bundles its own runtime; no Java or other installation required. |
Real-time performance budgets
The timing guarantees CueSync is built and tested against:
| Path | Budget |
|---|---|
| Beat to trigger decision | < 5 ms |
| OSC message send | < 2 ms |
| UI frame time during beat animations | < 16 ms (60 fps) |
| Reconnection backoff | starts at 1 s, caps at 30 s |
Beat information arrives roughly 25 times per second from each connected player, and cue decisions are made on a dedicated real-time path — nothing you do in the interface can delay a cue.
Network requirements
Plan your show network (and firewall rules) around these:
| Traffic | Direction | Transport / ports |
|---|---|---|
| Pioneer PRO DJ LINK | in/out | UDP 50000–50002 (CueSync joins as a virtual CDJ). Don't run rekordbox on the same machine during a show — it claims these ports exclusively. |
| OSC input (triggers, GMA3 bridge) | in | UDP, default port 9001 (Settings → Advanced). Binds loopback-only by default; enable "listen on all interfaces" deliberately. |
| Output protocols | out | Per protocol — see the Protocol Reference port table (OSC/UDP, TCP, Telnet, HTTP). |
| Device discovery | in/out | Multicast (mDNS) plus per-protocol subnet probes. |
| License & updates | out | HTTPS to cuesync.live (certificate-pinned). Activation works offline after the first check-in; shows never depend on internet connectivity. |
Best practice: keep show control (consoles, media servers) and audience/guest Wi-Fi on separate networks. CueSync lets you pick the network interface per subsystem (Pioneer, outputs, Show Companion) so the traffic stays where you put it.
Timecode
| Input sources | CDJ position, MIDI Time Code (quarter-frame and full-frame SysEx), LTC (decoded from an audio input), TCNet — with priority-based source selection and per-source offsets. |
| Output | MTC, LTC, Art-Net timecode, TCNet. |
| Frame rates | 24 · 25 · 29.97 drop-frame · 30 fps. |
| Loss handling | Freewheel — the internal generator carries the show through signal dropouts, clearly badged in Run Mode. |
Audio
| Local playback formats | WAV, AIFF, MP3, M4A/AAC, FLAC, OGG. |
| Analysis | Beat grid, phrase structure, energy curve, key, integrated LUFS + loudness range — all computed on-device. |
| Loudness matching | Optional (Production edition): attenuate-only toward a −23…−9 LUFS target — it never boosts, so it can never clip. |
| Optional ML analysis | Vocal detection via a ~2 MB on-device model, downloaded once and integrity-verified. Audio never leaves the machine. |
Editions
All editions include all 19 output protocols and the same connection-reliability layer. Editions gate workflows:
| Workflow | DJ | Theatre | Production |
|---|---|---|---|
| Pioneer PRO DJ LINK, Track Prep, Auto Pilot, DJ analysis | ✓ | — | ✓ |
| Show Editor, Run Mode, timecode engine, MTC output, Show Companion | — | ✓ | ✓ |
| Cues, Cue Pads, Looks & Scenes, MIDI, venue profiles | ✓ | ✓ | ✓ |
| Loudness automation (matching + Loudness Transition trigger) | — | — | ✓ |
| Venue profile slots | 3 | 25 | unlimited |
The per-trigger edition matrix is in the Trigger Reference.
Show files & data safety
- Show files always open — CueSync migrates show files saved by any earlier release automatically, writing a backup first.
- Atomic saves — a save either completes fully or leaves the previous file untouched.
- Automatic dated backups plus a periodic recovery snapshot restored via the Recovery dialog after an unclean exit.
- Telemetry and error tracking are off by default and opt-in (Settings → Advanced).
Related
- Protocol Reference — transports and default ports per output
- Timecode — configuring sources and output
- Diagnostics — the connection event log and diagnostic bundle export
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