Timecode Tool App

Send, receive, view, and convert SMPTE timecode on stage. Generate from a custom start TC, monitor LTC or Art-Net, and route between them — all in one app.

Timecode Tool is a focused utility for live-show technicians who need to generate, monitor, route, or convert SMPTE timecode on iPad, iPhone, and Apple Silicon Mac.

Four modes:

GENERATE • Output LTC audio and Art-Net Timecode driven by system time-of-day, a free-running 1-hour block, or a custom Start Timecode you type in (e.g. 02:03:20:15) that free-runs from that point. • Pick FPS (24, 25, 29.97 NDF, 29.97 DF, 30) including correct SMPTE drop-frame counting. • Send to a specific Art-Net destination IP (unicast or broadcast).

TIMECODE VIEW • A large, glanceable timecode readout for monitoring. • Choose the source: decode LTC from an audio input, or receive Art-Net Timecode over the network. Frame rate and lock state are shown live.

ART-NET → LTC • Receive Art-Net Timecode (UDP 6454) and re-encode it as SMPTE LTC audio out to your selected output device. • Latency-compensation slider advances or retards the encoded LTC to align with downstream devices, with drift tracking and a re-sync control.

LTC → ART-NET • Decode LTC audio from your selected input device / channel and forward every frame as Art-Net Timecode to one or more receivers. • Auto-detects the source frame rate and the SMPTE drop-frame flag.

Cross-cutting features: • Background-audio capable — keeps generating / decoding when the screen is locked or another app is foreground (essential for live-show use). • Audio-session interruption handling: phone calls and Siri don't break the timecode stream — work resumes automatically. • Shows your device's IP addresses for quick configuration. • Works with Class-Compliant USB audio interfaces over USB-C / Lightning on supported iPad and iPhone models.

Timecode Tool does not collect, store, or transmit any personal data.