LTC scan badges

LTCast scans each audio file in the setlist to find embedded LTC timecode. The scan runs in the background after you add files. The result is shown as a small badge on each song card.

Badge states

Pending (gray) — the file is queued for scanning; LTCast will scan it shortly in the background
Scanning (spinning icon) — LTCast is actively reading the file to find LTC signal
Scanned — N segments (green) — LTC found; the number shows how many continuous LTC segments were detected in the file; hover the badge to see frame rate and segment timecodes; click to rescan
No LTC (yellow) — the scan completed but no LTC signal was found; the file plays as regular audio without timecode broadcast
Error (red) — the scan failed due to a read error or unsupported format; click the badge to retry

What counts as a segment

A single audio file can contain multiple LTC segments. A segment is a continuous stretch of decodable LTC frames. Gaps happen when timecode resets mid-file, when there is silence between two timecode regions, or when the signal is interrupted. Each detected segment is listed separately when you hover the scan badge, showing its start time in the audio file, its starting SMPTE address, and its frame rate.

Multiple segments in one file are common when a day's worth of recordings are concatenated into a single file. LTCast handles them — each segment is played back with the correct timecode address when the playhead reaches it.

Rescanning

Click any scan badge to rescan that file. Use this if you replaced the file on disk with an updated version.

Rescan all

The Rescan All button in the setlist toolbar rescans every file in the current setlist variant. This is useful after replacing a batch of files or when you want to verify all scans are current before a show.

Scan and audio output

The LTC scan determines where timecode is embedded in the audio. During playback, LTCast reads the audio from that channel and decodes it in real time. The scan result is cached in the project file — rescanning is only needed if the audio file changes.

If a file shows No LTC but you know it contains timecode, try rescanning. Some files with timecode on a non-standard channel may need manual channel assignment in the per-song settings.

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