How to CADET: free caption and audio description authoring software from WGBH’s NCAM (lecture session)


Presented at 11:15am in Standley I Lab on Wednesday, November 14, 2018.



  • Bryan Gould, Director , WGBH/NCAM

Session Details

  • Length of Session: 1-hr
  • Format: Lecture
  • Expertise Level: All Levels
  • Type of session: General Conference


WGBH’s NCAM has released CADET (Caption and Description Editing Tool) - free, downloadable software that enables anyone to easily produce high-quality caption files and audio description scripts that are compatible with any media player on any web browser. In addition, new resources from the DIAGRAM Center for accessible digital images.


The National Center for Accessible Media at WGBH (NCAM) has released CADET (Caption and Description Editing Tool.) CADET is a free, high-quality tool that is used by individuals and institutions to easily produce high-quality caption files and audio description scripts that are compatible with any media player on any web browser.

The presentation will highlight CADET’s main features including caption authoring, transcript editing and timing, and output to multiple caption formats. CADET also includes tools for authoring audio description scripts, including unique features that come from WGBH’s decades of experience in audio description.

NCAM is a long-time partner with the DIAGRAM Center and the presentation will also highlight DIAGRAM resources focused on accessible digital images including expanded image description guidelines, the POET image description training tool, and Accessible Peep – a host of resources for educators for creating accessible digital media.


  1. WGBH, with decades of production experience, offers a free tool for creating captions and descriptions
  2. How to author and publish captions and descriptions with CADET
  3. DIAGRAM Center resources for accessible digital images

Disability Areas

Deaf/Hard of Hearing, Vision

Topic Areas

Teaching about Accessibility in Curriculum, Uncategorized, Web/Media/App Access

Speaker Bio(s)

Bryan Gould

Bryan Gould, WGBH/NCAM Director of Accessible Learning and Assessment Technologies. Bryan has been conducting blindness-related research and development projects for over 20 years at WGBH. His projects range from improving access to complex scientific images and high-stakes assessments to amusement park rides and smart phone apps. Bryan’s multiple published guidelines, most notably the STEM Image Description Guidelines, have been adopted by many educational publishers and accessibility organizations and he regularly conducts training sessions on how best to present images, video, and digital experiences to meet the needs of people with visual and print disabilities. Bryan is expert in writing image description for alt text and audio description for video.