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Welcome to Digital 4.
We offer over 25 years’ experience developing and supplying Theatre Captioning and Opera Surtitling systems for venues throughout the UK and Europe.


Theatre Captioning and Opera Surtitle Displays and Software.

Digital 4 has transformed Theatre Captioning and access to the Theatre for deaf, deafened and hard-of-hearing audiences with hundreds of Caption Units and Captioning Software supplied to venues throughout the UK, Europe, and beyond.

Our Theatre Caption, Opera Surtitle and Theatre Sub-Title systems out-put text to LED Displays, Projectors, LCD Displays, Tablets and Smart-Caption Glasses. Our software can be used for Live-Streaming, Multi-Language output, Automatic Translation, and Automatic Live Speech-to-Text. 

“Many thanks to Digital 4 for their brilliant service! They really listened to what we were trying to do with the screens and found a brilliant way to make it all work. Can’t recommend highly enough.”

Keziah Serreau /Associate Director Kneehigh Theatre

Whether your project is for Theatre Captions, Opera Surtitles or Theatre Sub-titles, Digital 4 can assist from concept and design through to manufacture, supply, installation, training and support.

Captioning Ed Fringe 2023

Latest News

The next generation of Caption Units are now available
Digital 4 in association with Signblazer Ltd has launched the next generation of full-colour LED displays for captioning...Read more