There is an existing rudimentary conversion to "plain text". A conversion to SSML, Speech Synthesis Markup Language [1], would be a manageable project for someone with some experience with XSLT.
Then services like online-convert.com (free, used for EPUB input) [2] or Amazon Web Services Polly (pay) [3] may produce a useful audio rendering.
There is an existing rudimentary conversion to "plain text". A conversion to SSML, Speech Synthesis Markup Language [1], would be a manageable project for someone with some experience with XSLT.
Then services like
online-convert.com
(free, used for EPUB input) [2] or Amazon Web Services Polly (pay) [3] may produce a useful audio rendering.[1] https://en.wikipedia.org/wiki/Speech_Synthesis_Markup_Language
[2] https://www.online-convert.com/
[3] https://aws.amazon.com/polly/