Record Triggers

Four triggers can start and stop recording. All of them go through the same path as the record button, so the usual safety checks apply whichever one fires.

Trigger	Where	Good for
Main sequence	Project Settings → Show Timing	Most shows — no setup beyond the timing cues you already have
DMX control channel	Preferences → Control → DMX	An explicit channel controlled from the desk
Timecode	Preferences → Control → Timecode	Timecode-only shows
Schedule	Preferences → Schedule	Unattended recording — see Scheduling

Main sequence

In Project Settings → Show Timing, turn on Start and stop recording with these cues. The show-start cue on the main lighting sequence rolls the record, and the show-end cue stops it. They're the same two cue numbers used for the running times. Cues on other lists (followspots, buskers) are ignored.

DMX control channel

ShowRevue listens to one channel over sACN or Art-Net:

• Full (255) starts recording
• 50% (126–128) stops recording

All other levels are ignored. A level has to hold for one second before it acts, so you can fade to a command value and a fade passing through 50% won't stop the recording.

Setup

1. Preferences → Control → DMX → Record Trigger, turn it on.
2. Choose sACN or Art-Net.
3. Enter the universe and the control channel.
4. On a Mac with more than one network interface, pick the one sACN should use — there's a listen interface on the trigger and a send interface on the tally.

The panel shows the live level on the channel, so you can check the desk is reaching ShowRevue while you set it up.

On the desk

Patch the channel as a dimmer channel (8 bit), in a universe the desk is already outputting. Take it to full in the cue where recording should start, to 50% where it should stop, and leave it at zero the rest of the time.

Timecode

Preferences → Control → Timecode records automatically when timecode is received, and stops after timecode has been silent for a set delay. Set the delay longer than any timecode gap inside your show.

Recording tally out

The reverse direction: ShowRevue can send a channel that shows whether it's recording, for the desk to map onto an indicator in a magic sheet or screen layout.

Set it up next to the trigger (Preferences → Control → DMX → Recording Tally Out): protocol, universe, channel, and either Slow pulse (the channel breathes while recording) or Steady 255. The channel sits at 0 when not recording. The Test button sends 8 seconds of the recording output without rolling a take, for checking the desk's indicator during setup.

Use a spare universe. ShowRevue sends the rest of the universe at zero and the sACN priority is settable (default 25, desks default to 100), so on a shared universe the tally defers to any real source. Art-Net has no priority field.

Notes

• A start while already recording does nothing; a stop while stopped does nothing — so it's safe to run more than one trigger at once.
• Triggers are written to the log (categories dmx, tctrigger, seqtrigger) — the place to look if a cue didn't roll the record.
• Show-Ready flags a DMX trigger that's enabled but hearing nothing on its universe.
• Testing with a software sACN transmitter running on the same Mac may show nothing arriving — most tools (sACNView included) send multicast without loopback, so no other app on that machine can hear them. Test from another machine on the network, or from the desk.