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Old 08-04-2021, 01:19 PM   #4
kovidgoyal
creator of calibre
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Posts: 45,455
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According to this: https://developer.mozilla.org/en-US/...Utterance/text

the limit is 32K characters which calibre already respects. If you can find some reference for a smaller limit, I can change it to that. Or you can experiment yourself, see the function speak_marked_text in tts.pyj
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