The word 'dictation' is confusing here. I think you want 'recitation', 'vocalization', 'narration' or just 'reading'. Dictation is speech-to-text, this is text-to-speech.
> Dictation is the transcription of spoken text: one person who is "dictating" speaks and another who is "taking dictation" writes down the words as they are spoken. Among speakers of several languages, dictation is used as a test of language skill, similar to spelling bees in the English-speaking world.