> ## 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.

# Vizrt TriCaster

> Control Vizrt (NewTek) TriCaster live production systems — switch program and preview, transitions, keyers, recording, streaming, media players, and macros — with live state and triggers.

The **Vizrt TriCaster** device controls [Vizrt TriCaster](https://www.vizrt.com/products/tricaster/) live production systems (formerly NewTek) over their HTTP control interface.

## Connection

The agent connects to the TriCaster over the network. Provide the switcher's **host**, and if needed adjust the **port** (default **80**), the **user name** and **password** (both default to `admin` — change them on your switcher for security), and the **status poll interval**.

<Note>
  The TriCaster must have a live session running (not just be powered on) for automation commands to work.
</Note>

## Commands

The TriCaster device supports a broad set of live-production operations, including:

* Set the **program** and **preview** source by name, and **cut** or **auto-transition** — with a selectable transition type and speed
* Control **M/E buses** and **downstream keyers** (transition, or force on/off air)
* Start and stop **recording** and **streaming**, and **grab a still** of the program output
* Control **media players** (DDRs, graphics, stills, and titles) — play, stop, next, previous, and mark in/out
* **Run macros** by name
* Set **audio** volume and mute per source, and **route outputs** (mix/aux) to a source
* **Recall and save** M/E memories
* Push rundown data into on-air **title templates**
* Send a raw switcher shortcut for operations not listed above

## State and triggers

The device reports its connection state and raises triggers your [rules](/automation/rules) can react to, including:

* Connection changes
* A source going **on or off air** (tally)
* **Program** and **preview** source changes
* **Recording** and **streaming** state changes

Trigger data such as the source name and on-air status is available for use in rule actions.