Documentation

Everything you need to get started with LTCue.

System Requirements

You'll also need:

• An audio interface with LTC input
• SMPTE/LTC timecode source

Installation

macOS

1. Download the .dmg from the download page
2. Open the .dmg file
3. Drag LTCue to your Applications folder
4. First launch: Right-click → Open (to bypass Gatekeeper)

Required: Install the libltc library:

brew install libltc

Windows

1. Download the installer from the download page
2. Run the installer
3. Follow the installation prompts
4. Launch LTCue from the Start menu

Resolume OSC Setup

LTCue communicates with Resolume Arena via OSC. Configure Resolume:

1. Open Resolume Arena
2. Go to Preferences → OSC
3. Enable OSC Input on port 7000
4. Enable OSC Output on port 7001
5. Click OK

Audio Setup

1. Open LTCue and go to the Settings tab
2. Select your audio interface from the Device dropdown
3. Select the Channel receiving LTC timecode (0 = first channel)
4. Set the Framerate to match your timecode source (usually 30 fps)

Your First Scan

1. Make sure Resolume Arena is running with a composition loaded
2. Ensure some clips have SMPTE timecode offsets configured
3. Click Scan Resolume in LTCue
4. Wait for the scan to complete
5. Select which layers to monitor using the checkboxes

Engine Modes

Single Engine Mode

One LTC stream triggers clips across all selected layers. Use this for simple shows with a single timecode source.

Dual Engine Mode (Licensed)

Two independent LTC streams, each controlling specific layers. Perfect for:

• A-roll and B-roll on separate timelines
• Main show + backup timecode
• Complex multi-timeline productions

Toggle between modes using the switch in the top-right corner.

Trigger Parameters

Access these in the Settings tab:

Jump Detection

When LTCue detects a timeline jump (scrubbing, looping, or seeking), it automatically:

1. Resets all clip trigger status to "ready"
2. Enters rearm mode for 3 frames
3. Only triggers clips that have been passed

This prevents double-triggering when scrubbing through your timeline.

Layer Selection

Use the layer checkboxes to control which Resolume layers LTCue monitors:

• Only clips in selected layers will appear in the clip table
• Only clips in selected layers will be triggered
• In Dual Engine mode, each engine has its own layer selection

Configuring SMPTE Offsets

For LTCue to trigger a clip, the clip must:

1. Have its transport type set to SMPTE 1 or SMPTE 2
2. Have a SMPTE offset time configured

To set this up in Resolume:

1. Select a clip
2. In the clip properties, find Transport
3. Set transport to SMPTE 1 (or SMPTE 2 for dual engine setups)
4. Set the Offset to when the clip should trigger (HH:MM:SS:FF)

Transport Types

LTCue only triggers clips with these transport types:

• SMPTE 1 — Triggered by Engine 1
• SMPTE 2 — Triggered by Engine 2 (Dual mode)

Clips with other transport types (Timeline, BPM, Denon, Pioneer) are ignored.

Trial Limitations

The free trial includes:

• 1 layer maximum
• 10 clips per layer
• Single engine mode only
• 60-minute session limit

Activating a License

1. Purchase a license from the download page
2. You'll receive a license key via email
3. In LTCue, go to Settings → License
4. Enter your license key and click Activate

License Transfer

To move your license to a new machine:

1. On your old machine: Settings → License → Deactivate
2. On your new machine: Enter your key and click Activate

License terms:

• One license per machine
• Easy transfer to new machines
• Lifetime updates for the major version purchased (v1.x)
• 30-day revalidation (works offline, checks online monthly)

Troubleshooting

No Timecode Displayed

• Check your audio interface is selected in Settings
• Verify the correct channel is selected
• Ensure LTC audio is being sent to that channel
• Try a different framerate setting

Clips Not Triggering

• Verify clips have SMPTE 1 or SMPTE 2 transport type
• Check clip offsets are set correctly in Resolume
• Ensure the layer containing the clip is selected
• Increase the Tolerance setting if timecode is slightly off

Scan Finds No Clips

• Ensure Resolume is running with a composition loaded
• Check OSC is properly configured
• Verify some clips have SMPTE offsets configured

App Won't Launch (macOS)

If macOS blocks the app:

1. Go to System Preferences → Security & Privacy
2. Click "Open Anyway" for LTCue
3. Or right-click the app and select "Open"

Keyboard Shortcuts