> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fabl.studio/llms.txt
> Use this file to discover all available pages before exploring further.

# Figure 53 QLab

> Run QLab cues from your rundown — start, stop, pause and resume, select cues, move the playhead, load to a position, and set audio levels.

The **QLab** device controls [Figure 53 QLab](https://qlab.app/), the show-control application, so your rundown can fire sound, video, and lighting cues that already live in a QLab workspace.

## Connection

Provide the **host**, the **send port**, and the **reply port**. If the machine holds more than one workspace, name the **workspace ID**; if the workspace is protected, set its **passcode**.

## Commands

| Command          | What it does                                                                        |
| ---------------- | ----------------------------------------------------------------------------------- |
| Transport        | Runs a transport action — start, stop, pause, resume and the rest — on a target cue |
| Select cue       | Selects a cue by number or by unique id                                             |
| Move playhead    | Moves the standby cue to a specific cue number                                      |
| Load to position | Loads a cue and sets its playback position to a time in seconds                     |
| Set audio level  | Sets an audio cue's slider level in dB for a channel, where 0 is the master         |
| Authenticate     | Authenticates to the workspace with its passcode                                    |

Cues can be addressed by number, by unique id, or as the current selection. A raw OSC command is available for any address not listed here.

<Tip>
  Addressing by **unique id** survives renumbering. A cue number is easier to read in a rule, but it changes when someone reorders the workspace — an id does not.
</Tip>

## State and triggers

The device reports its connection state and raises a trigger when the connection changes.