Every word counts

Technical specifications

Open captioning is the delivery of a body of text via a computer and cable link to a display, usually a dot matrix screen, triggered in real-time by an operator.

The equipment needed for a captioned performance comprises:

  • Windows computer with Microsoft Word for converting the script into a plain text document, and Stagetext captioning software for formatting the script and outputting it to the display unit during the captioned performance.
  • USB to RS485 converter unit. This terminates in an XLR suitable for house tie lines or audio multicore.
  • Stagetext LED display unit. This is a dot matrix with a configuration of 352 x 64 pixels (11 modules across at 32 dots per module x 4 modules high at 16 dots per module). The LEDs are 3.00mm with 4.57mm pitch. The display case has a rigging point at each end on the top and comes supplied with a ½ ton bow shackle.

Available equipment includes:

1 x laptop computer loaded with captioning program, spellcheck program and converter driver

1 x link to captioning software, spellcheck software, converter driver and technical information

1 x USB A-B cable

1 x USB RS485 interface unit

1 x XLR Y-cord

2 x 2 metre microphone cable
2 x 20 metre microphone cable
1 x drum 100 metre microphone cable

1 x drum 50 metre microphone cable

1 x Stagetext display in transit case


RS232/RS485 converter and RS485 data cabling.

Further information

For more details on purchasing your own captioning equipment, please email enquiries, or call us on 020 7377 0540.


The Arts Council
The Arts Council
The Arts Council