LTCast LTCast
Guide

Run timecode before the music starts

since v0.7.22

A lighting console needs a few seconds of running timecode before it will lock, and writing the first cue is awkward when the song begins on the very first frame. Pre-roll gives you that room: the clock runs, the music stays silent, and the music then arrives exactly on the song's start timecode.

  1. 1

    Switch to the TC GENERATOR tab and set START TC — this is the timecode the music will land on.

  2. 2

    Set the seconds in PRE-ROLL, next to Offset in the transport bar. It is set per song, and the box lights up when it is not zero so you can see at a glance which songs have one.

    The transport bar showing the Offset control and, next to it, PRE-ROLL set to 5 seconds.
  3. 3

    Press play. The timecode starts a few seconds before START TC and counts up; the transport shows the countdown; the music comes in on START TC.

Worth knowing

  • Cues are unaffected. The music still lands on the timecode you set, so everything you have already programmed — here and on the console — points at the same moment in the song.
  • The pre-roll cannot be deeper than the song's own start timecode, because timecode cannot run below zero. If START TC is 00:00:00:00 the box is disabled; set a later start timecode first.
  • Dragging the playhead, resuming from pause, or auto-advancing to the next song never re-runs the pre-roll — it only happens when you press play.

Still stuck? Email [email protected] — happy to help you get a show locked.