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Successful live production is an art form that requires TV producers to blend human expertise with technology while making split-second decisions. That’s why tally light systems are a vital component, helping to guide everyone and everything through the complexities of live production. Read on to learn how these systems help producers manage and control the multiple cameras, equipment, and phases involved in modern live video broadcasting.   

What is a tally light system? 

A tally light system is a signaling mechanism that enhances communication during live broadcasts involving multiple cameras. A controller uses a series of visual cues to help the production team, from the directors to the camera operators and on-screen talent, play their roles flawlessly.  

Typically, a tally light is a small signal lamp set on top of a video camera or a monitor, often above the lens or the viewfinder. When a camera is live, the tally light turns red, signaling that its feed is being broadcast to let the on-air talent know which camera to address.  

Modern tally light systems have progressed beyond controlling the tally lights and are more accurately described as tally control systems, covering a wide range of equipment and functionality. Today, we can use the tally system to control virtually every aspect of a live broadcast.  

How does a tally light system work? 

A tally light or control system comprises a controller that integrates with your video production systems. It uses a programmable software interface to communicate and control multiple on-set equipment.  

After receiving signals from routers, video switches, and other production equipment, the system interprets them to determine which camera is live. It then uses color-coded indicators to provide the production crew and the on-stage talent with clear visual clues.  

Tally control systems also integrate with other systems to enrich the broadcasting experience. For instance, you may connect them to your graphics systems and update display information, such as overlays, in real time, and even functions outside of production, like controlling studio windows, blinds, or.  

Their wide variety of control interfaces, Ethernet, Serial, , and the visibility of signal flow make tally control systems extraordinarily versatile and able to act as a core element of a production automation workflow.  

A RESTful interface to a logging system may allow tracking of camera usage throughout a broadcast to help the team assess the correct resource allocations for a production, helping to answer questions like, ‘Did we need to rent that ninth camera that was only on air for eight seconds?’   

Serial interfaces allow extensive control of legacy equipment so that it can be redeployed in less sensitive operations to maximize ROI. GPIs are infinitely flexible, from allowing direct interaction with custom circuits for auto failover to receiving basic error statuses for display on a multiviewer. 

The visibility into the accurate signal flow of the system and the versatility of interfaces and logic make a tally control system the beating heart of any production, supporting operators and the wider team. 

Why do TV productions use tally control systems? 

Broadcasters use tally control systems to build efficient video production workflows. It can automate most production processes while allowing your team to function flawlessly.  

Benefits of using a video tally system include:  

• A matchless edge when covering live events such as elections, awards, sports, or breaking news  
• Injecting a “live feel” into regular productions such as games and talk shows with minimal post-production work   
• Building a bespoke video production system with no brand or manufacturer limitations  
• Ability to automate most live production processes while enriching viewer experience  
• Minimizing broadcasting failure to ensure smooth, continuous live broadcasts  

The right choice of a tally control system lets you unlock new heights in your live broadcasting capabilities. Learn more about our tally control systems here.