Industrial Automation
meets the
Broadcast Studio

Save Time

We save your engineers time - and time is money. The TallyEngine GUI gives engineers one place to go for graphical control of video and audio routing, MultiViewer layout selection, UMD source naming, tally logic, and GPIO routing. Tallies and UMD names follow along router crosspoints, so a routable monitor will always have proper tally and source naming.


While this level of flexibility is helpful in busy permanent studio settings, it is invaluable in mobile sports production. The ability to load and save router, UMD, MultiViewer, source name, and tally/GPIO configurations means you can now book a set/shoot/strike along your truck's travel route which you would otherwise have had to pass up - that's money in the bank.

Say Yes

TallyEngine brings the ability to link GPIO-capable broadcast equipment in new ways, giving you the ability to say "Yes" to the client. An intercom key, programmed to trigger a GPO, signals the TallyEngine to key up a radio, providing seamless integration. Switcher GPO can trigger EVS GPI for play, pause, and recue, allowing TDs to build perfect automated transitions feeding from multiple graphics sources.


In any broadcast studio, there are functions which tend to be taken for granted, but which cause havoc if they fail to operate properly. On-air tally and monitor source naming are two such systems - if nobody can tell if what signal is on-air, which cameras are live, whether or not the truck is feeding network, then a simple shoot becomes an evening of crisis and frayed nerves. If the technical crew can't be sure that just because a monitor display says "Camera 4", they're really looking at Camera 4, that's when the mistakes and miscues start to pile up.

TallyEngine systems are aimed at the "hidden necessities" of broadcasting, providing seamless integration of tally, GPIO routing, main router control, and source naming:

  • Tally signals flow as if the router had extra levels just to route tally, meaning that a routable monitor always shows proper tally colors.
  • Tally hardware can be easily configured to match voltage levels of your equipment, preventing the need for extra tally interface devices.
  • Integration of Tally and GPIO signals makes it easy to support inter-device connections - including conversion from levels to pulses, inverting of signals, and complex logical structures.
  • GPIO signals can switch router crosspoints, enabling easier effects builds.
  • Router crosspoint switches can generate tally closures, opening up many options for automation and monitoring.
  • Under-Monitor Displays (UMDs) show source names based on router crosspoints, so that UMDs on any routable monitor always have correct name information.
  • Existing PCs can become control centers for routing, source name control, and tally configuration - software defined button displays are an easy and inexpensive alternative to adding router heads.

Custom Hardware

Sometimes in designing broadcasting systems we encounter problems which have no common off-the-shelf solutions. For those situations, we are happy to work with our customers to create customized hardware and software systems. These can be as simple as a tally output level converter which takes a 5VDC level output and produces relay closures with mating connectors on both sides, or as complex as a 16 by 16 PC-AT Keyboard routing switcher, allowing one-to-one mapping of keyboards to EVS machines. (Later we modified the board to work with either PC-AT or USB 1.1 level signals, both styles are still available.)

We also use conventional industrial controls hardware with custom software for the broadcast studio. One example is the ability to control items from multiple locations easily - this can be accomplished using ethernet-connected touch-screen displays which are readily installed where needed, and are easily programmed for different applications.

Contact TallyEngine with your system interconnection issues - we can work with you to provide a robust, inexpensive solution.