There are several reasons why you should consider using text to speech software for your eLearning courses.
Converting words into speech accommodates learning difficulties, develops speech and literacy skills, and allows for different paces to work with.
The eLearning Industry website has an article which shares the best text to speech software for eLearning, so that you can be able to explore your options and select the right text to speech software for you.
elearningindustry.com/top-10-text-to-speech-tts-software-elearning