Some media is audio-only, meaning it has no visual component. Because caption timing is not as important in audio-only media, a transcript is a sufficient alternative format.
Transcripts are typically verbatim, written records of pre-recorded audio. They include information about speaker changes and ambient noises, if that information is relevant. For example, in a recorded discussion about different dog breeds, barking may be key information.
Please read this article by W3C for more information about making audio recordings accessible.
Last modified July 6, 2018